Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

42 files changed, 2390 insertions, 0 deletions

diff --git a/config/external/fdlibm/moz.build b/config/external/fdlibm/moz.build
new file mode 100644
index 0000000000..343645f0ce
--- /dev/null
+++ b/config/external/fdlibm/moz.build
@@ -0,0 +1,12 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "JavaScript Engine")
+
+DIRS += [
+    "../../../modules/fdlibm",
+]
diff --git a/config/external/ffi/moz.build b/config/external/ffi/moz.build
new file mode 100644
index 0000000000..ee0dc884e0
--- /dev/null
+++ b/config/external/ffi/moz.build
@@ -0,0 +1,149 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+FINAL_LIBRARY = "js"
+
+if CONFIG["MOZ_SYSTEM_FFI"]:
+    OS_LIBS += CONFIG["MOZ_FFI_LIBS"]
+else:
+    AllowCompilerWarnings()
+    NoVisibilityFlags()
+
+    CONFIGURE_DEFINE_FILES += [
+        "/js/src/ctypes/libffi/fficonfig.h",
+    ]
+    LOCAL_INCLUDES += [
+        "!/js/src/ctypes/libffi",
+        "!/js/src/ctypes/libffi/include",
+        "/js/src/ctypes/libffi/include",
+        "/js/src/ctypes/libffi/src/%s" % CONFIG["FFI_TARGET_DIR"],
+    ]
+
+    DEFINES["TARGET"] = CONFIG["FFI_TARGET"]
+    DEFINES[CONFIG["FFI_TARGET"]] = True
+    DEFINES["FFI_NO_RAW_API"] = True
+    DEFINES["FFI_BUILDING"] = True
+    DEFINES["HAVE_AS_ASCII_PSEUDO_OP"] = True
+    DEFINES["HAVE_AS_STRING_PSEUDO_OP"] = True
+
+    if CONFIG["MOZ_DEBUG"]:
+        DEFINES["FFI_DEBUG"] = True
+        if not CONFIG["MOZ_NO_DEBUG_RTL"]:
+            DEFINES["USE_DEBUG_RTL"] = True
+        SOURCES += [
+            "/js/src/ctypes/libffi/src/debug.c",
+        ]
+
+    if CONFIG["OS_TARGET"] != "WINNT":
+        DEFINES["HAVE_HIDDEN_VISIBILITY_ATTRIBUTE"] = True
+
+    if CONFIG["INTEL_ARCHITECTURE"]:
+        DEFINES["HAVE_AS_X86_PCREL"] = True
+
+    # Don't bother setting EH_FRAME_FLAGS on Windows.
+    # Quoted defines confuse msvcc.sh, and the value isn't used there.
+    if CONFIG["OS_TARGET"] != "WINNT":
+        if CONFIG["FFI_TARGET"] == "ARM":
+            DEFINES["EH_FRAME_FLAGS"] = '"aw"'
+        else:
+            DEFINES["EH_FRAME_FLAGS"] = '"a"'
+
+    # Common source files.
+    SOURCES += [
+        "/js/src/ctypes/libffi/src/closures.c",
+        "/js/src/ctypes/libffi/src/java_raw_api.c",
+        "/js/src/ctypes/libffi/src/prep_cif.c",
+        "/js/src/ctypes/libffi/src/raw_api.c",
+        "/js/src/ctypes/libffi/src/types.c",
+    ]
+
+    # Per-platform sources and flags.
+    ffi_srcs = ()
+    ffi_h_defines = []
+    if CONFIG["FFI_TARGET"] == "X86_WIN64":
+        if CONFIG["CC_TYPE"] == "clang-cl":
+            ffi_srcs = ("ffiw64.c",)
+            # libffi asm needs to be preprocessed for MSVC's assembler
+            GeneratedFile(
+                "win64_intel.asm",
+                inputs=[
+                    "/js/src/ctypes/libffi/src/x86/win64_intel.S",
+                    "!/js/src/ctypes/libffi/fficonfig.h",
+                    "!/js/src/ctypes/libffi/include/ffi.h",
+                ],
+                script="preprocess_libffi_asm.py",
+                flags=["$(DEFINES)", "$(LOCAL_INCLUDES)"],
+            )
+            SOURCES += ["!win64_intel.asm"]
+        else:
+            ffi_srcs = ("ffiw64.c", "win64.S")
+
+    elif CONFIG["FFI_TARGET"] == "X86_64":
+        DEFINES["HAVE_AS_X86_64_UNWIND_SECTION_TYPE"] = True
+        ffi_srcs = ("ffi64.c", "unix64.S", "ffiw64.c", "win64.S")
+
+    elif CONFIG["FFI_TARGET"] == "X86_WIN32" and CONFIG["CC_TYPE"] == "clang-cl":
+        ffi_srcs = ("ffi.c",)
+        # libffi asm needs to be preprocessed for MSVC's assembler
+        GeneratedFile(
+            "sysv_intel.asm",
+            inputs=[
+                "/js/src/ctypes/libffi/src/x86/sysv_intel.S",
+                "!/js/src/ctypes/libffi/fficonfig.h",
+                "!/js/src/ctypes/libffi/include/ffi.h",
+            ],
+            script="preprocess_libffi_asm.py",
+            flags=["$(DEFINES)", "$(LOCAL_INCLUDES)"],
+        )
+        SOURCES += ["!sysv_intel.asm"]
+        ASFLAGS += ["-safeseh"]
+
+    elif CONFIG["FFI_TARGET"] == "ARM_WIN64":
+        ffi_srcs = ("ffi.c",)
+
+        # libffi asm needs to be preprocessed for MSVC's assembler
+        GeneratedFile(
+            "win64_armasm.asm",
+            inputs=[
+                "/js/src/ctypes/libffi/src/aarch64/win64_armasm.S",
+                "!/js/src/ctypes/libffi/fficonfig.h",
+                "!/js/src/ctypes/libffi/include/ffi.h",
+            ],
+            script="preprocess_libffi_asm.py",
+            flags=["$(DEFINES)", "$(LOCAL_INCLUDES)"],
+        )
+        SOURCES += ["!win64_armasm.asm"]
+
+    else:
+        ffi_srcs = ("ffi.c", "sysv.S")
+
+    if CONFIG["FFI_TARGET"] in ("X86_WIN32", "X86_DARWIN") and CONFIG["CC_TYPE"] in (
+        "gcc",
+        "clang",
+    ):
+        DEFINES["SYMBOL_UNDERSCORE"] = True
+
+    if CONFIG["OS_ARCH"] == "Darwin" and CONFIG["TARGET_CPU"] in ("arm", "aarch64"):
+        DEFINES["FFI_EXEC_TRAMPOLINE_TABLE"] = True
+        ffi_h_defines.append("FFI_EXEC_TRAMPOLINE_TABLE")
+
+    elif (
+        CONFIG["OS_ARCH"] in ("Darwin", "FreeBSD", "GNU_kFreeBSD", "OpenBSD", "SunOS")
+        or CONFIG["OS_TARGET"] == "Android"
+    ):
+        DEFINES["FFI_MMAP_EXEC_WRIT"] = True
+
+    SOURCES += [
+        "/js/src/ctypes/libffi/src/%s/%s" % (CONFIG["FFI_TARGET_DIR"], s)
+        for s in sorted(ffi_srcs)
+    ]
+
+    GeneratedFile(
+        "/js/src/ctypes/libffi/include/ffi.h",
+        script="subst_header.py",
+        inputs=["/js/src/ctypes/libffi/include/ffi.h.in"],
+        flags=ffi_h_defines,
+    )
diff --git a/config/external/ffi/preprocess_libffi_asm.py b/config/external/ffi/preprocess_libffi_asm.py
new file mode 100644
index 0000000000..4808c3a7e4
--- /dev/null
+++ b/config/external/ffi/preprocess_libffi_asm.py
@@ -0,0 +1,25 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Souce Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distibuted with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+import shlex
+import subprocess
+
+import buildconfig
+import mozpack.path as mozpath
+
+
+def main(output, input_asm, ffi_h, ffi_config_h, defines, includes):
+    defines = shlex.split(defines)
+    includes = shlex.split(includes)
+    # CPP uses -E which generates #line directives. -EP suppresses them.
+    # -TC forces the compiler to treat the input as C.
+    cpp = buildconfig.substs["CPP"] + ["-EP"] + ["-TC"]
+    input_asm = mozpath.relpath(input_asm, os.getcwd())
+    args = cpp + defines + includes + [input_asm]
+    print(" ".join(args))
+    preprocessed = subprocess.check_output(args)
+    output.write(preprocessed)
diff --git a/config/external/ffi/subst_header.py b/config/external/ffi/subst_header.py
new file mode 100644
index 0000000000..e1448ff889
--- /dev/null
+++ b/config/external/ffi/subst_header.py
@@ -0,0 +1,32 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Souce Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distibuted with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import sys
+
+import buildconfig
+from mozbuild.preprocessor import Preprocessor
+
+
+def main(output, input_file, *defines):
+    pp = Preprocessor()
+    pp.context.update(
+        {
+            "FFI_EXEC_TRAMPOLINE_TABLE": "0",
+            "HAVE_LONG_DOUBLE": "0",
+            "TARGET": buildconfig.substs["FFI_TARGET"],
+            "VERSION": "",
+        }
+    )
+    for d in defines:
+        pp.context.update({d: "1"})
+    pp.do_filter("substitution")
+    pp.setMarker(None)
+    pp.out = output
+    pp.do_include(input_file)
+
+
+if __name__ == "__main__":
+    main(*sys.agv[1:])
diff --git a/config/external/freetype2/moz.build b/config/external/freetype2/moz.build
new file mode 100644
index 0000000000..3d025e1ee4
--- /dev/null
+++ b/config/external/freetype2/moz.build
@@ -0,0 +1,14 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("freetype")
+
+if CONFIG["MOZ_TREE_FREETYPE"]:
+    DIRS += [
+        "/modules/freetype2",
+    ]
+else:
+    OS_LIBS += CONFIG["FT2_LIBS"]
diff --git a/config/external/gkcodecs/gkcodecs.symbols b/config/external/gkcodecs/gkcodecs.symbols
new file mode 100644
index 0000000000..12cb274c70
--- /dev/null
+++ b/config/external/gkcodecs/gkcodecs.symbols
@@ -0,0 +1,158 @@
+# libaom symbols
+aom_codec_av1_cx
+aom_codec_av1_dx
+aom_codec_build_config
+aom_codec_control
+aom_codec_dec_init_ver
+aom_codec_decode
+aom_codec_destroy
+aom_codec_destroy
+aom_codec_enc_config_default
+aom_codec_enc_init_ver
+aom_codec_encode
+aom_codec_err_to_string
+aom_codec_error
+aom_codec_error_detail
+aom_codec_get_caps
+aom_codec_get_cx_data
+aom_codec_get_frame
+aom_codec_peek_stream_info
+aom_codec_set_option
+aom_codec_version
+aom_codec_version_str
+aom_img_free
+aom_img_plane_height
+aom_img_plane_width
+aom_img_wrap
+#if defined(X86_WIN64)
+aom_winx64_fstcw
+#endif
+av1_apply_encoding_flags
+av1_change_config
+av1_convert_sect5obus_to_annexb
+av1_copy_new_frame_enc
+av1_copy_reference_enc
+av1_create_compressor
+av1_get_active_map
+av1_get_compressed_data
+av1_get_global_headers
+av1_get_last_show_frame
+av1_get_preview_raw_frame
+av1_get_quantizer
+av1_initialize_enc
+av1_qindex_to_quantizer
+av1_quantizer_to_qindex
+av1_receive_raw_frame
+av1_remove_compressor
+av1_set_active_map
+av1_set_internal_size
+av1_set_reference_enc
+av1_use_as_reference
+# libogg symbols
+ogg_calloc_func
+ogg_free_func
+ogg_malloc_func
+ogg_page_bos
+ogg_page_granulepos
+ogg_page_serialno
+ogg_realloc_func
+ogg_set_mem_functions
+ogg_stream_check
+ogg_stream_clear
+ogg_stream_eos
+ogg_stream_flush
+ogg_stream_init
+ogg_stream_packetin
+ogg_stream_packetout
+ogg_stream_pagein
+ogg_stream_pageout
+ogg_stream_reset
+ogg_sync_buffer
+ogg_sync_clear
+ogg_sync_init
+ogg_sync_pageseek
+ogg_sync_reset
+ogg_sync_wrote
+# libopus symbols
+opus_decode
+opus_decoder_create
+opus_decoder_ctl
+opus_decoder_destroy
+opus_encode
+opus_encode_float
+opus_encoder_create
+opus_encoder_ctl
+opus_encoder_destroy
+opus_get_version_string
+opus_multistream_decode
+opus_multistream_decode_float
+opus_multistream_decoder_create
+opus_multistream_decoder_ctl
+opus_multistream_decoder_destroy
+opus_multistream_encode
+opus_multistream_encoder_create
+opus_multistream_encoder_ctl
+opus_multistream_encoder_destroy
+opus_packet_get_nb_channels
+opus_packet_get_nb_frames
+opus_packet_get_samples_per_frame
+opus_packet_parse
+opus_strerror
+# libtheora symbols
+th_comment_clear
+th_comment_init
+th_decode_alloc
+th_decode_free
+th_decode_headerin
+th_decode_packetin
+th_decode_ycbcr_out
+th_granule_frame
+th_info_clear
+th_info_init
+th_packet_isheader
+th_packet_iskeyframe
+th_setup_free
+vorbis_block_clear
+vorbis_block_init
+vorbis_comment_clear
+vorbis_comment_init
+vorbis_dsp_clear
+vorbis_info_clear
+vorbis_info_init
+vorbis_packet_blocksize
+vorbis_synthesis
+vorbis_synthesis_blockin
+vorbis_synthesis_headerin
+vorbis_synthesis_init
+vorbis_synthesis_pcmout
+vorbis_synthesis_read
+vorbis_synthesis_restart
+# libvpx symbols
+#ifndef MOZ_SYSTEM_LIBVPX
+vpx_codec_build_config
+vpx_codec_control_
+vpx_codec_dec_init_ver
+vpx_codec_decode
+vpx_codec_destroy
+vpx_codec_enc_config_default
+vpx_codec_enc_config_set
+vpx_codec_enc_init_multi_ver
+vpx_codec_enc_init_ver
+vpx_codec_encode
+vpx_codec_err_to_string
+vpx_codec_error
+vpx_codec_error_detail
+vpx_codec_get_caps
+vpx_codec_get_cx_data
+vpx_codec_get_frame
+vpx_codec_set_frame_buffer_functions
+vpx_codec_version
+vpx_codec_version_str
+vpx_codec_vp8_cx
+vpx_codec_vp8_dx
+vpx_codec_vp9_cx
+vpx_codec_vp9_dx
+vpx_img_alloc
+vpx_img_free
+vpx_img_wrap
+#endif
diff --git a/config/external/gkcodecs/moz.build b/config/external/gkcodecs/moz.build
new file mode 100644
index 0000000000..040f6809de
--- /dev/null
+++ b/config/external/gkcodecs/moz.build
@@ -0,0 +1,18 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# The gkcodecs library contains code from third-party libraries implementing
+# encoding an decoding for particular audio and video codecs.
+#
+# They are compiled in a separate shared library to be able to be available
+# both from libxul (when decoding using the codec integration layer Gecko
+# provides) and from ffmpeg (when decoding and encoding through ffmpeg).
+
+GeckoSharedLibrary("gkcodecs", linkage=None)
+SHARED_LIBRARY_NAME = "gkcodecs"
+SYMBOLS_FILE = "gkcodecs.symbols"
+if CONFIG["MOZ_SYSTEM_LIBVPX"]:
+    DEFINES["MOZ_SYSTEM_LIBVPX"] = True
diff --git a/config/external/icu/common/moz.build b/config/external/icu/common/moz.build
new file mode 100644
index 0000000000..b670c06222
--- /dev/null
+++ b/config/external/icu/common/moz.build
@@ -0,0 +1,34 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("icuuc")
+FINAL_LIBRARY = "icu"
+
+DEFINES["U_COMMON_IMPLEMENTATION"] = True
+
+LOCAL_INCLUDES += ["/intl/icu/source/i18n"]
+
+include("../defs.mozbuild")
+include("sources.mozbuild")
+
+SOURCES += sources
+
+if CONFIG["TARGET_ENDIANNESS"] == "big":
+    HostLibrary("host_icuuc")
+    HOST_DEFINES["U_COMMON_IMPLEMENTATION"] = True
+    HOST_SOURCES += sources
+    HOST_SOURCES += other_sources
+
+# Clang 16 added an error that can be downgraded, but won't be downgradable
+# in clang 17.
+# https://unicode-org.atlassian.net/browse/ICU-22113
+if (
+    CONFIG["CC_TYPE"] in ("clang", "clang-cl")
+    and int(CONFIG["CC_VERSION"].split(".")[0]) == 16
+):
+    SOURCES["/intl/icu/source/common/ubidi.cpp"].flags += [
+        "-Wno-error=enum-constexpr-conversion"
+    ]
diff --git a/config/external/icu/common/sources.mozbuild b/config/external/icu/common/sources.mozbuild
new file mode 100644
index 0000000000..a8ac190241
--- /dev/null
+++ b/config/external/icu/common/sources.mozbuild
@@ -0,0 +1,305 @@
+# THIS FILE IS GENERATED BY /intl/icu_sources_data.py DO NOT EDIT
+sources = [
+    "/intl/icu/source/common/appendable.cpp",
+    "/intl/icu/source/common/bmpset.cpp",
+    "/intl/icu/source/common/brkeng.cpp",
+    "/intl/icu/source/common/brkiter.cpp",
+    "/intl/icu/source/common/bytesinkutil.cpp",
+    "/intl/icu/source/common/bytestream.cpp",
+    "/intl/icu/source/common/bytestrie.cpp",
+    "/intl/icu/source/common/bytestriebuilder.cpp",
+    "/intl/icu/source/common/caniter.cpp",
+    "/intl/icu/source/common/characterproperties.cpp",
+    "/intl/icu/source/common/chariter.cpp",
+    "/intl/icu/source/common/charstr.cpp",
+    "/intl/icu/source/common/cmemory.cpp",
+    "/intl/icu/source/common/cstring.cpp",
+    "/intl/icu/source/common/dictbe.cpp",
+    "/intl/icu/source/common/dictionarydata.cpp",
+    "/intl/icu/source/common/dtintrv.cpp",
+    "/intl/icu/source/common/edits.cpp",
+    "/intl/icu/source/common/emojiprops.cpp",
+    "/intl/icu/source/common/errorcode.cpp",
+    "/intl/icu/source/common/filteredbrk.cpp",
+    "/intl/icu/source/common/filterednormalizer2.cpp",
+    "/intl/icu/source/common/loadednormalizer2impl.cpp",
+    "/intl/icu/source/common/localebuilder.cpp",
+    "/intl/icu/source/common/localematcher.cpp",
+    "/intl/icu/source/common/localeprioritylist.cpp",
+    "/intl/icu/source/common/locavailable.cpp",
+    "/intl/icu/source/common/locbased.cpp",
+    "/intl/icu/source/common/locdispnames.cpp",
+    "/intl/icu/source/common/locdistance.cpp",
+    "/intl/icu/source/common/locdspnm.cpp",
+    "/intl/icu/source/common/locid.cpp",
+    "/intl/icu/source/common/loclikely.cpp",
+    "/intl/icu/source/common/loclikelysubtags.cpp",
+    "/intl/icu/source/common/locmap.cpp",
+    "/intl/icu/source/common/locresdata.cpp",
+    "/intl/icu/source/common/locutil.cpp",
+    "/intl/icu/source/common/lsr.cpp",
+    "/intl/icu/source/common/lstmbe.cpp",
+    "/intl/icu/source/common/messagepattern.cpp",
+    "/intl/icu/source/common/mlbe.cpp",
+    "/intl/icu/source/common/normalizer2.cpp",
+    "/intl/icu/source/common/normalizer2impl.cpp",
+    "/intl/icu/source/common/normlzr.cpp",
+    "/intl/icu/source/common/parsepos.cpp",
+    "/intl/icu/source/common/patternprops.cpp",
+    "/intl/icu/source/common/propname.cpp",
+    "/intl/icu/source/common/punycode.cpp",
+    "/intl/icu/source/common/putil.cpp",
+    "/intl/icu/source/common/rbbi.cpp",
+    "/intl/icu/source/common/rbbi_cache.cpp",
+    "/intl/icu/source/common/rbbidata.cpp",
+    "/intl/icu/source/common/rbbinode.cpp",
+    "/intl/icu/source/common/rbbirb.cpp",
+    "/intl/icu/source/common/rbbiscan.cpp",
+    "/intl/icu/source/common/rbbisetb.cpp",
+    "/intl/icu/source/common/rbbistbl.cpp",
+    "/intl/icu/source/common/rbbitblb.cpp",
+    "/intl/icu/source/common/resbund.cpp",
+    "/intl/icu/source/common/resource.cpp",
+    "/intl/icu/source/common/restrace.cpp",
+    "/intl/icu/source/common/ruleiter.cpp",
+    "/intl/icu/source/common/schriter.cpp",
+    "/intl/icu/source/common/serv.cpp",
+    "/intl/icu/source/common/servlk.cpp",
+    "/intl/icu/source/common/servlkf.cpp",
+    "/intl/icu/source/common/servls.cpp",
+    "/intl/icu/source/common/servnotf.cpp",
+    "/intl/icu/source/common/servrbf.cpp",
+    "/intl/icu/source/common/servslkf.cpp",
+    "/intl/icu/source/common/sharedobject.cpp",
+    "/intl/icu/source/common/simpleformatter.cpp",
+    "/intl/icu/source/common/static_unicode_sets.cpp",
+    "/intl/icu/source/common/stringpiece.cpp",
+    "/intl/icu/source/common/stringtriebuilder.cpp",
+    "/intl/icu/source/common/uarrsort.cpp",
+    "/intl/icu/source/common/ubidi.cpp",
+    "/intl/icu/source/common/ubidi_props.cpp",
+    "/intl/icu/source/common/ubidiln.cpp",
+    "/intl/icu/source/common/ubidiwrt.cpp",
+    "/intl/icu/source/common/ubrk.cpp",
+    "/intl/icu/source/common/ucase.cpp",
+    "/intl/icu/source/common/ucasemap.cpp",
+    "/intl/icu/source/common/ucasemap_titlecase_brkiter.cpp",
+    "/intl/icu/source/common/uchar.cpp",
+    "/intl/icu/source/common/ucharstrie.cpp",
+    "/intl/icu/source/common/ucharstriebuilder.cpp",
+    "/intl/icu/source/common/ucharstrieiterator.cpp",
+    "/intl/icu/source/common/uchriter.cpp",
+    "/intl/icu/source/common/ucln_cmn.cpp",
+    "/intl/icu/source/common/ucmndata.cpp",
+    "/intl/icu/source/common/ucnv.cpp",
+    "/intl/icu/source/common/ucnv_bld.cpp",
+    "/intl/icu/source/common/ucnv_cb.cpp",
+    "/intl/icu/source/common/ucnv_cnv.cpp",
+    "/intl/icu/source/common/ucnv_err.cpp",
+    "/intl/icu/source/common/ucnv_io.cpp",
+    "/intl/icu/source/common/ucnv_u16.cpp",
+    "/intl/icu/source/common/ucnv_u32.cpp",
+    "/intl/icu/source/common/ucnv_u7.cpp",
+    "/intl/icu/source/common/ucnv_u8.cpp",
+    "/intl/icu/source/common/ucnvbocu.cpp",
+    "/intl/icu/source/common/ucnvlat1.cpp",
+    "/intl/icu/source/common/ucnvscsu.cpp",
+    "/intl/icu/source/common/ucol_swp.cpp",
+    "/intl/icu/source/common/ucptrie.cpp",
+    "/intl/icu/source/common/ucurr.cpp",
+    "/intl/icu/source/common/udata.cpp",
+    "/intl/icu/source/common/udatamem.cpp",
+    "/intl/icu/source/common/udataswp.cpp",
+    "/intl/icu/source/common/uenum.cpp",
+    "/intl/icu/source/common/uhash.cpp",
+    "/intl/icu/source/common/uhash_us.cpp",
+    "/intl/icu/source/common/uinit.cpp",
+    "/intl/icu/source/common/uinvchar.cpp",
+    "/intl/icu/source/common/uiter.cpp",
+    "/intl/icu/source/common/ulist.cpp",
+    "/intl/icu/source/common/uloc.cpp",
+    "/intl/icu/source/common/uloc_keytype.cpp",
+    "/intl/icu/source/common/uloc_tag.cpp",
+    "/intl/icu/source/common/umapfile.cpp",
+    "/intl/icu/source/common/umath.cpp",
+    "/intl/icu/source/common/umutablecptrie.cpp",
+    "/intl/icu/source/common/umutex.cpp",
+    "/intl/icu/source/common/unames.cpp",
+    "/intl/icu/source/common/unifiedcache.cpp",
+    "/intl/icu/source/common/unifilt.cpp",
+    "/intl/icu/source/common/unifunct.cpp",
+    "/intl/icu/source/common/uniset.cpp",
+    "/intl/icu/source/common/uniset_closure.cpp",
+    "/intl/icu/source/common/uniset_props.cpp",
+    "/intl/icu/source/common/unisetspan.cpp",
+    "/intl/icu/source/common/unistr.cpp",
+    "/intl/icu/source/common/unistr_case.cpp",
+    "/intl/icu/source/common/unistr_case_locale.cpp",
+    "/intl/icu/source/common/unistr_cnv.cpp",
+    "/intl/icu/source/common/unistr_props.cpp",
+    "/intl/icu/source/common/unistr_titlecase_brkiter.cpp",
+    "/intl/icu/source/common/unormcmp.cpp",
+    "/intl/icu/source/common/uobject.cpp",
+    "/intl/icu/source/common/uprops.cpp",
+    "/intl/icu/source/common/uresbund.cpp",
+    "/intl/icu/source/common/uresdata.cpp",
+    "/intl/icu/source/common/uscript.cpp",
+    "/intl/icu/source/common/uscript_props.cpp",
+    "/intl/icu/source/common/uset.cpp",
+    "/intl/icu/source/common/uset_props.cpp",
+    "/intl/icu/source/common/usetiter.cpp",
+    "/intl/icu/source/common/usprep.cpp",
+    "/intl/icu/source/common/ustack.cpp",
+    "/intl/icu/source/common/ustr_cnv.cpp",
+    "/intl/icu/source/common/ustr_titlecase_brkiter.cpp",
+    "/intl/icu/source/common/ustrcase.cpp",
+    "/intl/icu/source/common/ustrcase_locale.cpp",
+    "/intl/icu/source/common/ustrenum.cpp",
+    "/intl/icu/source/common/ustrfmt.cpp",
+    "/intl/icu/source/common/ustring.cpp",
+    "/intl/icu/source/common/ustrtrns.cpp",
+    "/intl/icu/source/common/utext.cpp",
+    "/intl/icu/source/common/utf_impl.cpp",
+    "/intl/icu/source/common/util.cpp",
+    "/intl/icu/source/common/utrace.cpp",
+    "/intl/icu/source/common/utrie.cpp",
+    "/intl/icu/source/common/utrie2.cpp",
+    "/intl/icu/source/common/utrie2_builder.cpp",
+    "/intl/icu/source/common/utrie_swap.cpp",
+    "/intl/icu/source/common/uts46.cpp",
+    "/intl/icu/source/common/utypes.cpp",
+    "/intl/icu/source/common/uvector.cpp",
+    "/intl/icu/source/common/uvectr32.cpp",
+    "/intl/icu/source/common/uvectr64.cpp",
+    "/intl/icu/source/common/wintz.cpp",
+]
+other_sources = [
+    "/intl/icu/source/common/bytestrieiterator.cpp",
+    "/intl/icu/source/common/cstr.cpp",
+    "/intl/icu/source/common/cwchar.cpp",
+    "/intl/icu/source/common/icudataver.cpp",
+    "/intl/icu/source/common/icuplug.cpp",
+    "/intl/icu/source/common/pluralmap.cpp",
+    "/intl/icu/source/common/propsvec.cpp",
+    "/intl/icu/source/common/resbund_cnv.cpp",
+    "/intl/icu/source/common/ubiditransform.cpp",
+    "/intl/icu/source/common/ucat.cpp",
+    "/intl/icu/source/common/ucnv2022.cpp",
+    "/intl/icu/source/common/ucnv_ct.cpp",
+    "/intl/icu/source/common/ucnv_ext.cpp",
+    "/intl/icu/source/common/ucnv_lmb.cpp",
+    "/intl/icu/source/common/ucnv_set.cpp",
+    "/intl/icu/source/common/ucnvdisp.cpp",
+    "/intl/icu/source/common/ucnvhz.cpp",
+    "/intl/icu/source/common/ucnvisci.cpp",
+    "/intl/icu/source/common/ucnvmbcs.cpp",
+    "/intl/icu/source/common/ucnvsel.cpp",
+    "/intl/icu/source/common/uidna.cpp",
+    "/intl/icu/source/common/unorm.cpp",
+    "/intl/icu/source/common/ures_cnv.cpp",
+    "/intl/icu/source/common/usc_impl.cpp",
+    "/intl/icu/source/common/ushape.cpp",
+    "/intl/icu/source/common/ustr_wcs.cpp",
+    "/intl/icu/source/common/util_props.cpp",
+]
+EXPORTS.unicode += [
+    "/intl/icu/source/common/unicode/appendable.h",
+    "/intl/icu/source/common/unicode/brkiter.h",
+    "/intl/icu/source/common/unicode/bytestream.h",
+    "/intl/icu/source/common/unicode/bytestrie.h",
+    "/intl/icu/source/common/unicode/bytestriebuilder.h",
+    "/intl/icu/source/common/unicode/caniter.h",
+    "/intl/icu/source/common/unicode/casemap.h",
+    "/intl/icu/source/common/unicode/char16ptr.h",
+    "/intl/icu/source/common/unicode/chariter.h",
+    "/intl/icu/source/common/unicode/dbbi.h",
+    "/intl/icu/source/common/unicode/docmain.h",
+    "/intl/icu/source/common/unicode/dtintrv.h",
+    "/intl/icu/source/common/unicode/edits.h",
+    "/intl/icu/source/common/unicode/enumset.h",
+    "/intl/icu/source/common/unicode/errorcode.h",
+    "/intl/icu/source/common/unicode/filteredbrk.h",
+    "/intl/icu/source/common/unicode/icudataver.h",
+    "/intl/icu/source/common/unicode/icuplug.h",
+    "/intl/icu/source/common/unicode/idna.h",
+    "/intl/icu/source/common/unicode/localebuilder.h",
+    "/intl/icu/source/common/unicode/localematcher.h",
+    "/intl/icu/source/common/unicode/localpointer.h",
+    "/intl/icu/source/common/unicode/locdspnm.h",
+    "/intl/icu/source/common/unicode/locid.h",
+    "/intl/icu/source/common/unicode/messagepattern.h",
+    "/intl/icu/source/common/unicode/normalizer2.h",
+    "/intl/icu/source/common/unicode/normlzr.h",
+    "/intl/icu/source/common/unicode/parseerr.h",
+    "/intl/icu/source/common/unicode/parsepos.h",
+    "/intl/icu/source/common/unicode/platform.h",
+    "/intl/icu/source/common/unicode/ptypes.h",
+    "/intl/icu/source/common/unicode/putil.h",
+    "/intl/icu/source/common/unicode/rbbi.h",
+    "/intl/icu/source/common/unicode/rep.h",
+    "/intl/icu/source/common/unicode/resbund.h",
+    "/intl/icu/source/common/unicode/schriter.h",
+    "/intl/icu/source/common/unicode/simpleformatter.h",
+    "/intl/icu/source/common/unicode/std_string.h",
+    "/intl/icu/source/common/unicode/strenum.h",
+    "/intl/icu/source/common/unicode/stringoptions.h",
+    "/intl/icu/source/common/unicode/stringpiece.h",
+    "/intl/icu/source/common/unicode/stringtriebuilder.h",
+    "/intl/icu/source/common/unicode/symtable.h",
+    "/intl/icu/source/common/unicode/ubidi.h",
+    "/intl/icu/source/common/unicode/ubiditransform.h",
+    "/intl/icu/source/common/unicode/ubrk.h",
+    "/intl/icu/source/common/unicode/ucasemap.h",
+    "/intl/icu/source/common/unicode/ucat.h",
+    "/intl/icu/source/common/unicode/uchar.h",
+    "/intl/icu/source/common/unicode/ucharstrie.h",
+    "/intl/icu/source/common/unicode/ucharstriebuilder.h",
+    "/intl/icu/source/common/unicode/uchriter.h",
+    "/intl/icu/source/common/unicode/uclean.h",
+    "/intl/icu/source/common/unicode/ucnv.h",
+    "/intl/icu/source/common/unicode/ucnv_cb.h",
+    "/intl/icu/source/common/unicode/ucnv_err.h",
+    "/intl/icu/source/common/unicode/ucnvsel.h",
+    "/intl/icu/source/common/unicode/uconfig.h",
+    "/intl/icu/source/common/unicode/ucpmap.h",
+    "/intl/icu/source/common/unicode/ucptrie.h",
+    "/intl/icu/source/common/unicode/ucurr.h",
+    "/intl/icu/source/common/unicode/udata.h",
+    "/intl/icu/source/common/unicode/udisplaycontext.h",
+    "/intl/icu/source/common/unicode/uenum.h",
+    "/intl/icu/source/common/unicode/uidna.h",
+    "/intl/icu/source/common/unicode/uiter.h",
+    "/intl/icu/source/common/unicode/uldnames.h",
+    "/intl/icu/source/common/unicode/uloc.h",
+    "/intl/icu/source/common/unicode/umachine.h",
+    "/intl/icu/source/common/unicode/umisc.h",
+    "/intl/icu/source/common/unicode/umutablecptrie.h",
+    "/intl/icu/source/common/unicode/unifilt.h",
+    "/intl/icu/source/common/unicode/unifunct.h",
+    "/intl/icu/source/common/unicode/unimatch.h",
+    "/intl/icu/source/common/unicode/uniset.h",
+    "/intl/icu/source/common/unicode/unistr.h",
+    "/intl/icu/source/common/unicode/unorm.h",
+    "/intl/icu/source/common/unicode/unorm2.h",
+    "/intl/icu/source/common/unicode/uobject.h",
+    "/intl/icu/source/common/unicode/urename.h",
+    "/intl/icu/source/common/unicode/urep.h",
+    "/intl/icu/source/common/unicode/ures.h",
+    "/intl/icu/source/common/unicode/uscript.h",
+    "/intl/icu/source/common/unicode/uset.h",
+    "/intl/icu/source/common/unicode/usetiter.h",
+    "/intl/icu/source/common/unicode/ushape.h",
+    "/intl/icu/source/common/unicode/usprep.h",
+    "/intl/icu/source/common/unicode/ustring.h",
+    "/intl/icu/source/common/unicode/ustringtrie.h",
+    "/intl/icu/source/common/unicode/utext.h",
+    "/intl/icu/source/common/unicode/utf.h",
+    "/intl/icu/source/common/unicode/utf16.h",
+    "/intl/icu/source/common/unicode/utf32.h",
+    "/intl/icu/source/common/unicode/utf8.h",
+    "/intl/icu/source/common/unicode/utf_old.h",
+    "/intl/icu/source/common/unicode/utrace.h",
+    "/intl/icu/source/common/unicode/utypes.h",
+    "/intl/icu/source/common/unicode/uvernum.h",
+    "/intl/icu/source/common/unicode/uversion.h",
+]
diff --git a/config/external/icu/data/convert_icudata.py b/config/external/icu/data/convert_icudata.py
new file mode 100644
index 0000000000..b09affb9d8
--- /dev/null
+++ b/config/external/icu/data/convert_icudata.py
@@ -0,0 +1,20 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import os
+import subprocess
+
+import buildconfig
+
+
+def main(output, data_file):
+    output.close()
+    subprocess.run(
+        [
+            os.path.join(buildconfig.topobjdir, "dist", "host", "bin", "icupkg"),
+            "-tb",
+            data_file,
+            output.name,
+        ]
+    )
diff --git a/config/external/icu/data/icu_data.S b/config/external/icu/data/icu_data.S
new file mode 100644
index 0000000000..6ca4ce5973
--- /dev/null
+++ b/config/external/icu/data/icu_data.S
@@ -0,0 +1,29 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#if defined(_WIN32) && defined(__i386__)
+// Mark the object as SAFESEH-enabled.
+.def @feat.00;
+.scl 3;
+.type 0;
+.endef
+.global @feat.00
+.set @feat.00, 1
+#endif
+
+.global ICU_DATA_SYMBOL
+#if defined(__APPLE__)
+.data
+.const
+#elif defined(__wasi__)
+.section .rodata,"",@
+#else
+.section .rodata
+#endif
+.balign 16
+ICU_DATA_SYMBOL:
+.incbin ICU_DATA_FILE
+#ifdef __wasi__
+.size ICU_DATA_SYMBOL, . - ICU_DATA_SYMBOL
+#endif
diff --git a/config/external/icu/data/icudt73l.dat b/config/external/icu/data/icudt73l.dat
new file mode 100644
index 0000000000..b7c80341a8
--- /dev/null
+++ b/config/external/icu/data/icudt73l.dat
diff --git a/config/external/icu/data/moz.build b/config/external/icu/data/moz.build
new file mode 100644
index 0000000000..88926c94fa
--- /dev/null
+++ b/config/external/icu/data/moz.build
@@ -0,0 +1,40 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Build a library containing the ICU data for use in the JS shell, so that
+# JSAPI consumers don't have to deal with setting ICU's data path.
+Library("icudata")
+
+LOCAL_INCLUDES += ["."]
+
+prefix = ""
+if (CONFIG["OS_ARCH"] == "WINNT" and CONFIG["TARGET_CPU"] == "x86") or CONFIG[
+    "OS_ARCH"
+] == "Darwin":
+    prefix = "_"
+
+data_file = {
+    "little": "icudt%sl.dat" % CONFIG["MOZ_ICU_VERSION"],
+    "big": "icudt%sb.dat" % CONFIG["MOZ_ICU_VERSION"],
+}
+data_dir = {
+    "little": SRCDIR,
+    "big": OBJDIR,
+}
+endianness = CONFIG["TARGET_ENDIANNESS"] or "little"
+DEFINES["ICU_DATA_FILE"] = '"%s/%s"' % (data_dir[endianness], data_file[endianness])
+DEFINES["ICU_DATA_SYMBOL"] = "%sicudt%s_dat" % (prefix, CONFIG["MOZ_ICU_VERSION"])
+SOURCES += [
+    "icu_data.S",
+]
+
+if CONFIG["OS_ARCH"] == "WINNT" and CONFIG["CC_TYPE"] == "clang-cl":
+    USE_INTEGRATED_CLANGCL_AS = True
+
+if CONFIG["TARGET_ENDIANNESS"] == "big":
+    GeneratedFile(
+        data_file["big"], script="convert_icudata.py", inputs=[data_file["little"]]
+    )
diff --git a/config/external/icu/defs.mozbuild b/config/external/icu/defs.mozbuild
new file mode 100644
index 0000000000..d6d75358ef
--- /dev/null
+++ b/config/external/icu/defs.mozbuild
@@ -0,0 +1,75 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Also see <http://www.icu-project.org/repos/icu/tags/latest/icu4c/readme.html#RecBuild> for the
+# recommended build options when compiling ICU.
+# Don't use icu namespace automatically in client code.
+DEFINES["U_USING_ICU_NAMESPACE"] = 0
+# Don't include obsolete header files.
+DEFINES["U_NO_DEFAULT_INCLUDE_UTF_HEADERS"] = 1
+DEFINES["U_HIDE_OBSOLETE_UTF_OLD_H"] = 1
+
+# Remove chunks of the library that we don't need (yet).
+DEFINES["UCONFIG_NO_LEGACY_CONVERSION"] = True
+DEFINES["UCONFIG_NO_TRANSLITERATION"] = True
+DEFINES["UCONFIG_NO_REGULAR_EXPRESSIONS"] = True
+DEFINES["UCONFIG_NO_BREAK_ITERATION"] = True
+
+# We don't need to pass data to and from legacy char* APIs.
+DEFINES["U_CHARSET_IS_UTF8"] = True
+
+# Add 'explicit' keyword to UnicodeString constructors.
+DEFINES["UNISTR_FROM_CHAR_EXPLICIT"] = "explicit"
+DEFINES["UNISTR_FROM_STRING_EXPLICIT"] = "explicit"
+
+# Disable dynamic loading of ICU data as a loadable library.
+DEFINES["U_ENABLE_DYLOAD"] = 0
+
+if not CONFIG["HAVE_LANGINFO_CODESET"]:
+    DEFINES["U_HAVE_NL_LANGINFO_CODESET"] = 0
+
+if CONFIG["MOZ_DEBUG"]:
+    DEFINES["U_DEBUG"] = 1
+
+# ICU requires RTTI
+if CONFIG["CC_TYPE"] in ("clang", "gcc"):
+    CXXFLAGS += ["-frtti"]
+elif CONFIG["OS_TARGET"] == "WINNT":
+    # Remove the -GR- flag so we don't get a bunch of warning spam.
+    COMPILE_FLAGS["OS_CXXFLAGS"] = [
+        f for f in COMPILE_FLAGS["OS_CXXFLAGS"] if f != "-GR-"
+    ] + ["-GR"]
+
+DisableStlWrapping()
+AllowCompilerWarnings()
+
+# We allow compiler warnings, but we can at least cut down on spammy
+# warnings that get triggered for every file.
+if CONFIG["CC_TYPE"] in ("clang", "clang-cl"):
+    CFLAGS += [
+        "-Wno-c++20-compat",
+        "-Wno-comma",
+        "-Wno-implicit-const-int-float-conversion",
+        "-Wno-macro-redefined",
+        "-Wno-microsoft-include",
+        "-Wno-tautological-unsigned-enum-zero-compare",
+        "-Wno-unreachable-code-loop-increment",
+        "-Wno-unreachable-code-return",
+    ]
+    CXXFLAGS += [
+        "-Wno-c++20-compat",
+        "-Wno-comma",
+        "-Wno-implicit-const-int-float-conversion",
+        "-Wno-macro-redefined",
+        "-Wno-microsoft-include",
+        "-Wno-tautological-unsigned-enum-zero-compare",
+        "-Wno-unreachable-code-loop-increment",
+        "-Wno-unreachable-code-return",
+    ]
+
+for k, v in DEFINES.items():
+    if k != "UCONFIG_NO_LEGACY_CONVERSION":
+        HOST_DEFINES[k] = v
diff --git a/config/external/icu/i18n/moz.build b/config/external/icu/i18n/moz.build
new file mode 100644
index 0000000000..098aa7843f
--- /dev/null
+++ b/config/external/icu/i18n/moz.build
@@ -0,0 +1,24 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("icui18n")
+FINAL_LIBRARY = "icu"
+
+DEFINES["U_I18N_IMPLEMENTATION"] = True
+
+LOCAL_INCLUDES += ["/intl/icu/source/common"]
+LOCAL_INCLUDES += ["/mfbt/double-conversion"]
+
+include("../defs.mozbuild")
+include("sources.mozbuild")
+
+SOURCES += sources
+
+if CONFIG["TARGET_ENDIANNESS"] == "big":
+    HostLibrary("host_icui18n")
+    HOST_DEFINES["U_I18N_IMPLEMENTATION"] = True
+    HOST_SOURCES += sources
+    HOST_SOURCES += other_sources
diff --git a/config/external/icu/i18n/sources.mozbuild b/config/external/icu/i18n/sources.mozbuild
new file mode 100644
index 0000000000..b985d9be73
--- /dev/null
+++ b/config/external/icu/i18n/sources.mozbuild
@@ -0,0 +1,344 @@
+# THIS FILE IS GENERATED BY /intl/icu_sources_data.py DO NOT EDIT
+sources = [
+    "/intl/icu/source/i18n/astro.cpp",
+    "/intl/icu/source/i18n/basictz.cpp",
+    "/intl/icu/source/i18n/bocsu.cpp",
+    "/intl/icu/source/i18n/buddhcal.cpp",
+    "/intl/icu/source/i18n/calendar.cpp",
+    "/intl/icu/source/i18n/cecal.cpp",
+    "/intl/icu/source/i18n/chnsecal.cpp",
+    "/intl/icu/source/i18n/choicfmt.cpp",
+    "/intl/icu/source/i18n/coleitr.cpp",
+    "/intl/icu/source/i18n/coll.cpp",
+    "/intl/icu/source/i18n/collation.cpp",
+    "/intl/icu/source/i18n/collationbuilder.cpp",
+    "/intl/icu/source/i18n/collationcompare.cpp",
+    "/intl/icu/source/i18n/collationdata.cpp",
+    "/intl/icu/source/i18n/collationdatabuilder.cpp",
+    "/intl/icu/source/i18n/collationdatareader.cpp",
+    "/intl/icu/source/i18n/collationdatawriter.cpp",
+    "/intl/icu/source/i18n/collationfastlatin.cpp",
+    "/intl/icu/source/i18n/collationfastlatinbuilder.cpp",
+    "/intl/icu/source/i18n/collationfcd.cpp",
+    "/intl/icu/source/i18n/collationiterator.cpp",
+    "/intl/icu/source/i18n/collationkeys.cpp",
+    "/intl/icu/source/i18n/collationroot.cpp",
+    "/intl/icu/source/i18n/collationrootelements.cpp",
+    "/intl/icu/source/i18n/collationruleparser.cpp",
+    "/intl/icu/source/i18n/collationsets.cpp",
+    "/intl/icu/source/i18n/collationsettings.cpp",
+    "/intl/icu/source/i18n/collationtailoring.cpp",
+    "/intl/icu/source/i18n/collationweights.cpp",
+    "/intl/icu/source/i18n/compactdecimalformat.cpp",
+    "/intl/icu/source/i18n/coptccal.cpp",
+    "/intl/icu/source/i18n/curramt.cpp",
+    "/intl/icu/source/i18n/currfmt.cpp",
+    "/intl/icu/source/i18n/currpinf.cpp",
+    "/intl/icu/source/i18n/currunit.cpp",
+    "/intl/icu/source/i18n/dangical.cpp",
+    "/intl/icu/source/i18n/datefmt.cpp",
+    "/intl/icu/source/i18n/dayperiodrules.cpp",
+    "/intl/icu/source/i18n/dcfmtsym.cpp",
+    "/intl/icu/source/i18n/decContext.cpp",
+    "/intl/icu/source/i18n/decimfmt.cpp",
+    "/intl/icu/source/i18n/decNumber.cpp",
+    "/intl/icu/source/i18n/displayoptions.cpp",
+    "/intl/icu/source/i18n/dtfmtsym.cpp",
+    "/intl/icu/source/i18n/dtitvfmt.cpp",
+    "/intl/icu/source/i18n/dtitvinf.cpp",
+    "/intl/icu/source/i18n/dtptngen.cpp",
+    "/intl/icu/source/i18n/dtrule.cpp",
+    "/intl/icu/source/i18n/erarules.cpp",
+    "/intl/icu/source/i18n/ethpccal.cpp",
+    "/intl/icu/source/i18n/fmtable.cpp",
+    "/intl/icu/source/i18n/format.cpp",
+    "/intl/icu/source/i18n/formatted_string_builder.cpp",
+    "/intl/icu/source/i18n/formattedval_iterimpl.cpp",
+    "/intl/icu/source/i18n/formattedval_sbimpl.cpp",
+    "/intl/icu/source/i18n/formattedvalue.cpp",
+    "/intl/icu/source/i18n/fphdlimp.cpp",
+    "/intl/icu/source/i18n/fpositer.cpp",
+    "/intl/icu/source/i18n/gregocal.cpp",
+    "/intl/icu/source/i18n/gregoimp.cpp",
+    "/intl/icu/source/i18n/hebrwcal.cpp",
+    "/intl/icu/source/i18n/indiancal.cpp",
+    "/intl/icu/source/i18n/islamcal.cpp",
+    "/intl/icu/source/i18n/iso8601cal.cpp",
+    "/intl/icu/source/i18n/japancal.cpp",
+    "/intl/icu/source/i18n/listformatter.cpp",
+    "/intl/icu/source/i18n/measfmt.cpp",
+    "/intl/icu/source/i18n/measunit.cpp",
+    "/intl/icu/source/i18n/measunit_extra.cpp",
+    "/intl/icu/source/i18n/measure.cpp",
+    "/intl/icu/source/i18n/msgfmt.cpp",
+    "/intl/icu/source/i18n/nfrs.cpp",
+    "/intl/icu/source/i18n/nfrule.cpp",
+    "/intl/icu/source/i18n/nfsubs.cpp",
+    "/intl/icu/source/i18n/number_affixutils.cpp",
+    "/intl/icu/source/i18n/number_asformat.cpp",
+    "/intl/icu/source/i18n/number_capi.cpp",
+    "/intl/icu/source/i18n/number_compact.cpp",
+    "/intl/icu/source/i18n/number_currencysymbols.cpp",
+    "/intl/icu/source/i18n/number_decimalquantity.cpp",
+    "/intl/icu/source/i18n/number_decimfmtprops.cpp",
+    "/intl/icu/source/i18n/number_fluent.cpp",
+    "/intl/icu/source/i18n/number_formatimpl.cpp",
+    "/intl/icu/source/i18n/number_grouping.cpp",
+    "/intl/icu/source/i18n/number_integerwidth.cpp",
+    "/intl/icu/source/i18n/number_longnames.cpp",
+    "/intl/icu/source/i18n/number_mapper.cpp",
+    "/intl/icu/source/i18n/number_modifiers.cpp",
+    "/intl/icu/source/i18n/number_multiplier.cpp",
+    "/intl/icu/source/i18n/number_notation.cpp",
+    "/intl/icu/source/i18n/number_output.cpp",
+    "/intl/icu/source/i18n/number_padding.cpp",
+    "/intl/icu/source/i18n/number_patternmodifier.cpp",
+    "/intl/icu/source/i18n/number_patternstring.cpp",
+    "/intl/icu/source/i18n/number_rounding.cpp",
+    "/intl/icu/source/i18n/number_scientific.cpp",
+    "/intl/icu/source/i18n/number_simple.cpp",
+    "/intl/icu/source/i18n/number_skeletons.cpp",
+    "/intl/icu/source/i18n/number_symbolswrapper.cpp",
+    "/intl/icu/source/i18n/number_usageprefs.cpp",
+    "/intl/icu/source/i18n/number_utils.cpp",
+    "/intl/icu/source/i18n/numfmt.cpp",
+    "/intl/icu/source/i18n/numparse_affixes.cpp",
+    "/intl/icu/source/i18n/numparse_compositions.cpp",
+    "/intl/icu/source/i18n/numparse_currency.cpp",
+    "/intl/icu/source/i18n/numparse_decimal.cpp",
+    "/intl/icu/source/i18n/numparse_impl.cpp",
+    "/intl/icu/source/i18n/numparse_parsednumber.cpp",
+    "/intl/icu/source/i18n/numparse_scientific.cpp",
+    "/intl/icu/source/i18n/numparse_symbols.cpp",
+    "/intl/icu/source/i18n/numparse_validators.cpp",
+    "/intl/icu/source/i18n/numrange_capi.cpp",
+    "/intl/icu/source/i18n/numrange_fluent.cpp",
+    "/intl/icu/source/i18n/numrange_impl.cpp",
+    "/intl/icu/source/i18n/numsys.cpp",
+    "/intl/icu/source/i18n/olsontz.cpp",
+    "/intl/icu/source/i18n/persncal.cpp",
+    "/intl/icu/source/i18n/pluralranges.cpp",
+    "/intl/icu/source/i18n/plurfmt.cpp",
+    "/intl/icu/source/i18n/plurrule.cpp",
+    "/intl/icu/source/i18n/quantityformatter.cpp",
+    "/intl/icu/source/i18n/rbnf.cpp",
+    "/intl/icu/source/i18n/rbtz.cpp",
+    "/intl/icu/source/i18n/region.cpp",
+    "/intl/icu/source/i18n/reldatefmt.cpp",
+    "/intl/icu/source/i18n/reldtfmt.cpp",
+    "/intl/icu/source/i18n/rulebasedcollator.cpp",
+    "/intl/icu/source/i18n/scriptset.cpp",
+    "/intl/icu/source/i18n/search.cpp",
+    "/intl/icu/source/i18n/selfmt.cpp",
+    "/intl/icu/source/i18n/sharedbreakiterator.cpp",
+    "/intl/icu/source/i18n/simpletz.cpp",
+    "/intl/icu/source/i18n/smpdtfmt.cpp",
+    "/intl/icu/source/i18n/smpdtfst.cpp",
+    "/intl/icu/source/i18n/sortkey.cpp",
+    "/intl/icu/source/i18n/standardplural.cpp",
+    "/intl/icu/source/i18n/string_segment.cpp",
+    "/intl/icu/source/i18n/stsearch.cpp",
+    "/intl/icu/source/i18n/taiwncal.cpp",
+    "/intl/icu/source/i18n/timezone.cpp",
+    "/intl/icu/source/i18n/tmunit.cpp",
+    "/intl/icu/source/i18n/tmutamt.cpp",
+    "/intl/icu/source/i18n/tmutfmt.cpp",
+    "/intl/icu/source/i18n/tzfmt.cpp",
+    "/intl/icu/source/i18n/tzgnames.cpp",
+    "/intl/icu/source/i18n/tznames.cpp",
+    "/intl/icu/source/i18n/tznames_impl.cpp",
+    "/intl/icu/source/i18n/tzrule.cpp",
+    "/intl/icu/source/i18n/tztrans.cpp",
+    "/intl/icu/source/i18n/ucal.cpp",
+    "/intl/icu/source/i18n/ucln_in.cpp",
+    "/intl/icu/source/i18n/ucol.cpp",
+    "/intl/icu/source/i18n/ucol_res.cpp",
+    "/intl/icu/source/i18n/ucol_sit.cpp",
+    "/intl/icu/source/i18n/ucoleitr.cpp",
+    "/intl/icu/source/i18n/udat.cpp",
+    "/intl/icu/source/i18n/udateintervalformat.cpp",
+    "/intl/icu/source/i18n/udatpg.cpp",
+    "/intl/icu/source/i18n/ufieldpositer.cpp",
+    "/intl/icu/source/i18n/uitercollationiterator.cpp",
+    "/intl/icu/source/i18n/ulistformatter.cpp",
+    "/intl/icu/source/i18n/umsg.cpp",
+    "/intl/icu/source/i18n/units_complexconverter.cpp",
+    "/intl/icu/source/i18n/units_converter.cpp",
+    "/intl/icu/source/i18n/units_data.cpp",
+    "/intl/icu/source/i18n/units_router.cpp",
+    "/intl/icu/source/i18n/unum.cpp",
+    "/intl/icu/source/i18n/unumsys.cpp",
+    "/intl/icu/source/i18n/upluralrules.cpp",
+    "/intl/icu/source/i18n/usearch.cpp",
+    "/intl/icu/source/i18n/uspoof.cpp",
+    "/intl/icu/source/i18n/uspoof_impl.cpp",
+    "/intl/icu/source/i18n/utf16collationiterator.cpp",
+    "/intl/icu/source/i18n/utf8collationiterator.cpp",
+    "/intl/icu/source/i18n/utmscale.cpp",
+    "/intl/icu/source/i18n/vtzone.cpp",
+    "/intl/icu/source/i18n/windtfmt.cpp",
+    "/intl/icu/source/i18n/winnmfmt.cpp",
+    "/intl/icu/source/i18n/wintzimpl.cpp",
+    "/intl/icu/source/i18n/zonemeta.cpp",
+]
+other_sources = [
+    "/intl/icu/source/i18n/alphaindex.cpp",
+    "/intl/icu/source/i18n/anytrans.cpp",
+    "/intl/icu/source/i18n/brktrans.cpp",
+    "/intl/icu/source/i18n/casetrn.cpp",
+    "/intl/icu/source/i18n/cpdtrans.cpp",
+    "/intl/icu/source/i18n/csdetect.cpp",
+    "/intl/icu/source/i18n/csmatch.cpp",
+    "/intl/icu/source/i18n/csr2022.cpp",
+    "/intl/icu/source/i18n/csrecog.cpp",
+    "/intl/icu/source/i18n/csrmbcs.cpp",
+    "/intl/icu/source/i18n/csrsbcs.cpp",
+    "/intl/icu/source/i18n/csrucode.cpp",
+    "/intl/icu/source/i18n/csrutf8.cpp",
+    "/intl/icu/source/i18n/double-conversion-bignum-dtoa.cpp",
+    "/intl/icu/source/i18n/double-conversion-bignum.cpp",
+    "/intl/icu/source/i18n/double-conversion-cached-powers.cpp",
+    "/intl/icu/source/i18n/double-conversion-double-to-string.cpp",
+    "/intl/icu/source/i18n/double-conversion-fast-dtoa.cpp",
+    "/intl/icu/source/i18n/double-conversion-string-to-double.cpp",
+    "/intl/icu/source/i18n/double-conversion-strtod.cpp",
+    "/intl/icu/source/i18n/esctrn.cpp",
+    "/intl/icu/source/i18n/fmtable_cnv.cpp",
+    "/intl/icu/source/i18n/funcrepl.cpp",
+    "/intl/icu/source/i18n/gender.cpp",
+    "/intl/icu/source/i18n/inputext.cpp",
+    "/intl/icu/source/i18n/name2uni.cpp",
+    "/intl/icu/source/i18n/nortrans.cpp",
+    "/intl/icu/source/i18n/nultrans.cpp",
+    "/intl/icu/source/i18n/quant.cpp",
+    "/intl/icu/source/i18n/rbt.cpp",
+    "/intl/icu/source/i18n/rbt_data.cpp",
+    "/intl/icu/source/i18n/rbt_pars.cpp",
+    "/intl/icu/source/i18n/rbt_rule.cpp",
+    "/intl/icu/source/i18n/rbt_set.cpp",
+    "/intl/icu/source/i18n/regexcmp.cpp",
+    "/intl/icu/source/i18n/regeximp.cpp",
+    "/intl/icu/source/i18n/regexst.cpp",
+    "/intl/icu/source/i18n/regextxt.cpp",
+    "/intl/icu/source/i18n/rematch.cpp",
+    "/intl/icu/source/i18n/remtrans.cpp",
+    "/intl/icu/source/i18n/repattrn.cpp",
+    "/intl/icu/source/i18n/scientificnumberformatter.cpp",
+    "/intl/icu/source/i18n/strmatch.cpp",
+    "/intl/icu/source/i18n/strrepl.cpp",
+    "/intl/icu/source/i18n/titletrn.cpp",
+    "/intl/icu/source/i18n/tolowtrn.cpp",
+    "/intl/icu/source/i18n/toupptrn.cpp",
+    "/intl/icu/source/i18n/translit.cpp",
+    "/intl/icu/source/i18n/transreg.cpp",
+    "/intl/icu/source/i18n/tridpars.cpp",
+    "/intl/icu/source/i18n/ucsdet.cpp",
+    "/intl/icu/source/i18n/ulocdata.cpp",
+    "/intl/icu/source/i18n/unesctrn.cpp",
+    "/intl/icu/source/i18n/uni2name.cpp",
+    "/intl/icu/source/i18n/uregex.cpp",
+    "/intl/icu/source/i18n/uregexc.cpp",
+    "/intl/icu/source/i18n/uregion.cpp",
+    "/intl/icu/source/i18n/uspoof_build.cpp",
+    "/intl/icu/source/i18n/uspoof_conf.cpp",
+    "/intl/icu/source/i18n/utrans.cpp",
+    "/intl/icu/source/i18n/vzone.cpp",
+    "/intl/icu/source/i18n/zrule.cpp",
+    "/intl/icu/source/i18n/ztrans.cpp",
+]
+EXPORTS.unicode += [
+    "/intl/icu/source/i18n/unicode/alphaindex.h",
+    "/intl/icu/source/i18n/unicode/basictz.h",
+    "/intl/icu/source/i18n/unicode/calendar.h",
+    "/intl/icu/source/i18n/unicode/choicfmt.h",
+    "/intl/icu/source/i18n/unicode/coleitr.h",
+    "/intl/icu/source/i18n/unicode/coll.h",
+    "/intl/icu/source/i18n/unicode/compactdecimalformat.h",
+    "/intl/icu/source/i18n/unicode/curramt.h",
+    "/intl/icu/source/i18n/unicode/currpinf.h",
+    "/intl/icu/source/i18n/unicode/currunit.h",
+    "/intl/icu/source/i18n/unicode/datefmt.h",
+    "/intl/icu/source/i18n/unicode/dcfmtsym.h",
+    "/intl/icu/source/i18n/unicode/decimfmt.h",
+    "/intl/icu/source/i18n/unicode/displayoptions.h",
+    "/intl/icu/source/i18n/unicode/dtfmtsym.h",
+    "/intl/icu/source/i18n/unicode/dtitvfmt.h",
+    "/intl/icu/source/i18n/unicode/dtitvinf.h",
+    "/intl/icu/source/i18n/unicode/dtptngen.h",
+    "/intl/icu/source/i18n/unicode/dtrule.h",
+    "/intl/icu/source/i18n/unicode/fieldpos.h",
+    "/intl/icu/source/i18n/unicode/fmtable.h",
+    "/intl/icu/source/i18n/unicode/format.h",
+    "/intl/icu/source/i18n/unicode/formattednumber.h",
+    "/intl/icu/source/i18n/unicode/formattedvalue.h",
+    "/intl/icu/source/i18n/unicode/fpositer.h",
+    "/intl/icu/source/i18n/unicode/gender.h",
+    "/intl/icu/source/i18n/unicode/gregocal.h",
+    "/intl/icu/source/i18n/unicode/listformatter.h",
+    "/intl/icu/source/i18n/unicode/measfmt.h",
+    "/intl/icu/source/i18n/unicode/measunit.h",
+    "/intl/icu/source/i18n/unicode/measure.h",
+    "/intl/icu/source/i18n/unicode/msgfmt.h",
+    "/intl/icu/source/i18n/unicode/nounit.h",
+    "/intl/icu/source/i18n/unicode/numberformatter.h",
+    "/intl/icu/source/i18n/unicode/numberrangeformatter.h",
+    "/intl/icu/source/i18n/unicode/numfmt.h",
+    "/intl/icu/source/i18n/unicode/numsys.h",
+    "/intl/icu/source/i18n/unicode/plurfmt.h",
+    "/intl/icu/source/i18n/unicode/plurrule.h",
+    "/intl/icu/source/i18n/unicode/rbnf.h",
+    "/intl/icu/source/i18n/unicode/rbtz.h",
+    "/intl/icu/source/i18n/unicode/regex.h",
+    "/intl/icu/source/i18n/unicode/region.h",
+    "/intl/icu/source/i18n/unicode/reldatefmt.h",
+    "/intl/icu/source/i18n/unicode/scientificnumberformatter.h",
+    "/intl/icu/source/i18n/unicode/search.h",
+    "/intl/icu/source/i18n/unicode/selfmt.h",
+    "/intl/icu/source/i18n/unicode/simplenumberformatter.h",
+    "/intl/icu/source/i18n/unicode/simpletz.h",
+    "/intl/icu/source/i18n/unicode/smpdtfmt.h",
+    "/intl/icu/source/i18n/unicode/sortkey.h",
+    "/intl/icu/source/i18n/unicode/stsearch.h",
+    "/intl/icu/source/i18n/unicode/tblcoll.h",
+    "/intl/icu/source/i18n/unicode/timezone.h",
+    "/intl/icu/source/i18n/unicode/tmunit.h",
+    "/intl/icu/source/i18n/unicode/tmutamt.h",
+    "/intl/icu/source/i18n/unicode/tmutfmt.h",
+    "/intl/icu/source/i18n/unicode/translit.h",
+    "/intl/icu/source/i18n/unicode/tzfmt.h",
+    "/intl/icu/source/i18n/unicode/tznames.h",
+    "/intl/icu/source/i18n/unicode/tzrule.h",
+    "/intl/icu/source/i18n/unicode/tztrans.h",
+    "/intl/icu/source/i18n/unicode/ucal.h",
+    "/intl/icu/source/i18n/unicode/ucol.h",
+    "/intl/icu/source/i18n/unicode/ucoleitr.h",
+    "/intl/icu/source/i18n/unicode/ucsdet.h",
+    "/intl/icu/source/i18n/unicode/udat.h",
+    "/intl/icu/source/i18n/unicode/udateintervalformat.h",
+    "/intl/icu/source/i18n/unicode/udatpg.h",
+    "/intl/icu/source/i18n/unicode/udisplayoptions.h",
+    "/intl/icu/source/i18n/unicode/ufieldpositer.h",
+    "/intl/icu/source/i18n/unicode/uformattable.h",
+    "/intl/icu/source/i18n/unicode/uformattednumber.h",
+    "/intl/icu/source/i18n/unicode/uformattedvalue.h",
+    "/intl/icu/source/i18n/unicode/ugender.h",
+    "/intl/icu/source/i18n/unicode/ulistformatter.h",
+    "/intl/icu/source/i18n/unicode/ulocdata.h",
+    "/intl/icu/source/i18n/unicode/umsg.h",
+    "/intl/icu/source/i18n/unicode/unirepl.h",
+    "/intl/icu/source/i18n/unicode/unum.h",
+    "/intl/icu/source/i18n/unicode/unumberformatter.h",
+    "/intl/icu/source/i18n/unicode/unumberoptions.h",
+    "/intl/icu/source/i18n/unicode/unumberrangeformatter.h",
+    "/intl/icu/source/i18n/unicode/unumsys.h",
+    "/intl/icu/source/i18n/unicode/upluralrules.h",
+    "/intl/icu/source/i18n/unicode/uregex.h",
+    "/intl/icu/source/i18n/unicode/uregion.h",
+    "/intl/icu/source/i18n/unicode/ureldatefmt.h",
+    "/intl/icu/source/i18n/unicode/usearch.h",
+    "/intl/icu/source/i18n/unicode/usimplenumberformatter.h",
+    "/intl/icu/source/i18n/unicode/uspoof.h",
+    "/intl/icu/source/i18n/unicode/utmscale.h",
+    "/intl/icu/source/i18n/unicode/utrans.h",
+    "/intl/icu/source/i18n/unicode/vtzone.h",
+]
diff --git a/config/external/icu/icupkg/moz.build b/config/external/icu/icupkg/moz.build
new file mode 100644
index 0000000000..39314fbda7
--- /dev/null
+++ b/config/external/icu/icupkg/moz.build
@@ -0,0 +1,27 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+HostProgram("icupkg")
+
+LOCAL_INCLUDES += [
+    "/intl/icu/source/common",
+    "/intl/icu/source/i18n",
+    "/intl/icu/source/tools/toolutil",
+]
+
+include("../defs.mozbuild")
+include("sources.mozbuild")
+
+HOST_SOURCES += sources
+HOST_SOURCES += [
+    "/intl/icu/source/stubdata/stubdata.cpp",
+]
+
+HOST_USE_LIBS += [
+    "host_icui18n",
+    "host_icutoolutil",
+    "host_icuuc",
+]
diff --git a/config/external/icu/icupkg/sources.mozbuild b/config/external/icu/icupkg/sources.mozbuild
new file mode 100644
index 0000000000..8040087ccd
--- /dev/null
+++ b/config/external/icu/icupkg/sources.mozbuild
@@ -0,0 +1,4 @@
+# THIS FILE IS GENERATED BY /intl/icu_sources_data.py DO NOT EDIT
+sources = [
+    "/intl/icu/source/tools/icupkg/icupkg.cpp",
+]
diff --git a/config/external/icu/moz.build b/config/external/icu/moz.build
new file mode 100644
index 0000000000..296d60d521
--- /dev/null
+++ b/config/external/icu/moz.build
@@ -0,0 +1,22 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("icu")
+
+if CONFIG["MOZ_SYSTEM_ICU"]:
+    OS_LIBS += CONFIG["MOZ_ICU_LIBS"]
+else:
+    DIRS += [
+        "common",
+        "data",
+        "i18n",
+    ]
+    if CONFIG["TARGET_ENDIANNESS"] == "big":
+        DIRS += [
+            "toolutil",
+            "icupkg",
+        ]
+    USE_LIBS += ["icudata"]
diff --git a/config/external/icu/toolutil/moz.build b/config/external/icu/toolutil/moz.build
new file mode 100644
index 0000000000..e8dc827c2b
--- /dev/null
+++ b/config/external/icu/toolutil/moz.build
@@ -0,0 +1,20 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+HostLibrary("host_icutoolutil")
+FINAL_LIBRARY = "icu"
+
+DEFINES["U_TOOLUTIL_IMPLEMENTATION"] = True
+
+LOCAL_INCLUDES += [
+    "/intl/icu/source/common",
+    "/intl/icu/source/i18n",
+]
+
+include("../defs.mozbuild")
+include("sources.mozbuild")
+
+HOST_SOURCES += sources
diff --git a/config/external/icu/toolutil/sources.mozbuild b/config/external/icu/toolutil/sources.mozbuild
new file mode 100644
index 0000000000..1230133e27
--- /dev/null
+++ b/config/external/icu/toolutil/sources.mozbuild
@@ -0,0 +1,27 @@
+# THIS FILE IS GENERATED BY /intl/icu_sources_data.py DO NOT EDIT
+sources = [
+    "/intl/icu/source/tools/toolutil/collationinfo.cpp",
+    "/intl/icu/source/tools/toolutil/dbgutil.cpp",
+    "/intl/icu/source/tools/toolutil/denseranges.cpp",
+    "/intl/icu/source/tools/toolutil/filestrm.cpp",
+    "/intl/icu/source/tools/toolutil/filetools.cpp",
+    "/intl/icu/source/tools/toolutil/flagparser.cpp",
+    "/intl/icu/source/tools/toolutil/package.cpp",
+    "/intl/icu/source/tools/toolutil/pkg_genc.cpp",
+    "/intl/icu/source/tools/toolutil/pkg_gencmn.cpp",
+    "/intl/icu/source/tools/toolutil/pkg_icu.cpp",
+    "/intl/icu/source/tools/toolutil/pkgitems.cpp",
+    "/intl/icu/source/tools/toolutil/ppucd.cpp",
+    "/intl/icu/source/tools/toolutil/swapimpl.cpp",
+    "/intl/icu/source/tools/toolutil/toolutil.cpp",
+    "/intl/icu/source/tools/toolutil/ucbuf.cpp",
+    "/intl/icu/source/tools/toolutil/ucln_tu.cpp",
+    "/intl/icu/source/tools/toolutil/ucm.cpp",
+    "/intl/icu/source/tools/toolutil/ucmstate.cpp",
+    "/intl/icu/source/tools/toolutil/udbgutil.cpp",
+    "/intl/icu/source/tools/toolutil/unewdata.cpp",
+    "/intl/icu/source/tools/toolutil/uoptions.cpp",
+    "/intl/icu/source/tools/toolutil/uparse.cpp",
+    "/intl/icu/source/tools/toolutil/writesrc.cpp",
+    "/intl/icu/source/tools/toolutil/xmlparser.cpp",
+]
diff --git a/config/external/lgpllibs/lgpllibs.symbols b/config/external/lgpllibs/lgpllibs.symbols
new file mode 100644
index 0000000000..2d7c36dae2
--- /dev/null
+++ b/config/external/lgpllibs/lgpllibs.symbols
@@ -0,0 +1,17 @@
+_ZN7mozilla15RLBoxSoundTouch10numSamplesEv
+_ZN7mozilla15RLBoxSoundTouch10putSamplesEPKfj
+_ZN7mozilla15RLBoxSoundTouch10setSettingEii
+_ZN7mozilla15RLBoxSoundTouch11numChannelsEv
+_ZN7mozilla15RLBoxSoundTouch11setChannelsEj
+_ZN7mozilla15RLBoxSoundTouch13setSampleRateEj
+_ZN7mozilla15RLBoxSoundTouch14receiveSamplesEPfj
+_ZN7mozilla15RLBoxSoundTouch18resizeSampleBufferEj
+_ZN7mozilla15RLBoxSoundTouch21numUnprocessedSamplesEv
+_ZN7mozilla15RLBoxSoundTouch5flushEv
+_ZN7mozilla15RLBoxSoundTouch7setRateEd
+_ZN7mozilla15RLBoxSoundTouch8setPitchEd
+_ZN7mozilla15RLBoxSoundTouch8setTempoEd
+_ZN7mozilla15RLBoxSoundTouchC1Ev
+_ZN7mozilla15RLBoxSoundTouchC2Ev
+_ZN7mozilla15RLBoxSoundTouchD1Ev
+_ZN7mozilla15RLBoxSoundTouchD2Ev
diff --git a/config/external/lgpllibs/moz.build b/config/external/lgpllibs/moz.build
new file mode 100644
index 0000000000..1ef140baea
--- /dev/null
+++ b/config/external/lgpllibs/moz.build
@@ -0,0 +1,18 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# The lgpllibs library stores symbols from third-party LGPL licensed libraries,
+# such as libav and libsoundtouch. It fulfills the requirement of dynamically
+# linking these symbols into gecko.
+#
+# Any library added here should also be reflected in the about:license page.
+
+GeckoSharedLibrary("lgpllibs", linkage=None)
+SHARED_LIBRARY_NAME = "lgpllibs"
+
+# For some reason, mingw builds export way too many symbols.
+if CONFIG["TARGET_OS"] == "WINNT" and CONFIG["CC_TYPE"] != "clang-cl":
+    SYMBOLS_FILE = "lgpllibs.symbols"
diff --git a/config/external/moz.build b/config/external/moz.build
new file mode 100644
index 0000000000..2fc8df5799
--- /dev/null
+++ b/config/external/moz.build
@@ -0,0 +1,75 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+external_dirs = []
+
+DIRS += [
+    "gkcodecs",
+    "lgpllibs",
+    "rlbox",
+    "sqlite",
+]
+
+if CONFIG["MOZ_USING_WASM_SANDBOXING"]:
+    DIRS += [
+        "rlbox_wasm2c_sandbox",
+        "wasm2c_sandbox_compiler",
+    ]
+
+if not CONFIG["MOZ_SYSTEM_JPEG"]:
+    external_dirs += ["media/libjpeg"]
+
+DIRS += [
+    "/third_party/msgpack",
+    "/third_party/sipcc",
+]
+
+# There's no "native" brotli or woff2 yet, but probably in the future...
+external_dirs += ["modules/brotli"]
+external_dirs += ["modules/woff2"]
+
+external_dirs += ["modules/xz-embedded"]
+
+if CONFIG["MOZ_VORBIS"]:
+    external_dirs += ["media/libvorbis"]
+
+if not CONFIG["MOZ_SYSTEM_LIBVPX"]:
+    external_dirs += ["media/libvpx"]
+
+if CONFIG["MOZ_AV1"]:
+    external_dirs += ["media/libaom"]
+    external_dirs += ["media/libdav1d"]
+
+if not CONFIG["MOZ_SYSTEM_PNG"]:
+    external_dirs += ["media/libpng"]
+
+if not CONFIG["MOZ_SYSTEM_WEBP"]:
+    external_dirs += ["media/libwebp"]
+
+if CONFIG["TARGET_CPU"] == "arm":
+    external_dirs += ["media/openmax_dl/dl"]
+
+if CONFIG["MOZ_FFVPX"]:
+    external_dirs += ["media/ffvpx"]
+
+if CONFIG["MOZ_JXL"]:
+    external_dirs += ["media/libjxl", "media/highway"]
+
+external_dirs += [
+    "media/kiss_fft",
+    "media/libcubeb",
+    "media/libmkv",
+    "media/libnestegg",
+    "media/libogg",
+    "media/libopus",
+    "media/libtheora",
+    "media/libspeex_resampler",
+    "media/libsoundtouch",
+    "media/mp4parse-rust",
+    "media/psshparser",
+]
+
+DIRS += ["../../" + i for i in external_dirs]
diff --git a/config/external/nspr/_pl_bld.h b/config/external/nspr/_pl_bld.h
new file mode 100644
index 0000000000..57fb0e988f
--- /dev/null
+++ b/config/external/nspr/_pl_bld.h
@@ -0,0 +1,6 @@
+/*
+ * This file was previously generated at build time to set some preprocessor
+ * macros for use by plvrsion.c, but that file will set the values to (empty)
+ * defaults if they're not set, so this is just a stub to avoid having to
+ * generate another header file at build time.
+ */
diff --git a/config/external/nspr/_pr_bld.h b/config/external/nspr/_pr_bld.h
new file mode 100644
index 0000000000..1e36c69f13
--- /dev/null
+++ b/config/external/nspr/_pr_bld.h
@@ -0,0 +1,6 @@
+/*
+ * This file was previously generated at build time to set some preprocessor
+ * macros for use by prvrsion.c, but that file will set the values to (empty)
+ * defaults if they're not set, so this is just a stub to avoid having to
+ * generate another header file at build time.
+ */
diff --git a/config/external/nspr/ds/moz.build b/config/external/nspr/ds/moz.build
new file mode 100644
index 0000000000..d2676e2093
--- /dev/null
+++ b/config/external/nspr/ds/moz.build
@@ -0,0 +1,34 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["MOZ_FOLD_LIBS"]:
+    Library("plds4")
+else:
+    SharedLibrary("plds4")
+    SOURCES += ["/nsprpub/lib/ds/plvrsion.c"]
+    USE_LIBS += ["nspr4"]
+
+# We allow warnings for third-party code that can be updated from upstream.
+# TODO: fix NSPR warnings and remove this
+AllowCompilerWarnings()
+
+DEFINES["_NSPR_BUILD_"] = True
+
+LOCAL_INCLUDES += [
+    "/config/external/nspr",
+    "/nsprpub/pr/include",
+]
+
+EXPORTS.nspr += [
+    "/nsprpub/lib/ds/plarena.h",
+    "/nsprpub/lib/ds/plarenas.h",
+    "/nsprpub/lib/ds/plhash.h",
+]
+
+SOURCES += [
+    "/nsprpub/lib/ds/plarena.c",
+    "/nsprpub/lib/ds/plhash.c",
+]
diff --git a/config/external/nspr/libc/moz.build b/config/external/nspr/libc/moz.build
new file mode 100644
index 0000000000..62bb8814f6
--- /dev/null
+++ b/config/external/nspr/libc/moz.build
@@ -0,0 +1,45 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["MOZ_FOLD_LIBS"]:
+    Library("plc4")
+else:
+    SharedLibrary("plc4")
+    SOURCES += ["/nsprpub/lib/libc/src/plvrsion.c"]
+    USE_LIBS += ["nspr4"]
+
+# We allow warnings for third-party code that can be updated from upstream.
+# TODO: fix NSPR warnings and remove this
+AllowCompilerWarnings()
+
+DEFINES["_NSPR_BUILD_"] = True
+
+LOCAL_INCLUDES += [
+    "/config/external/nspr",
+]
+
+EXPORTS.nspr += [
+    "/nsprpub/lib/libc/include/plbase64.h",
+    "/nsprpub/lib/libc/include/plerror.h",
+    "/nsprpub/lib/libc/include/plgetopt.h",
+    "/nsprpub/lib/libc/include/plstr.h",
+]
+
+SOURCES += [
+    "/nsprpub/lib/libc/src/base64.c",
+    "/nsprpub/lib/libc/src/plerror.c",
+    "/nsprpub/lib/libc/src/plgetopt.c",
+    "/nsprpub/lib/libc/src/strcase.c",
+    "/nsprpub/lib/libc/src/strcat.c",
+    "/nsprpub/lib/libc/src/strchr.c",
+    "/nsprpub/lib/libc/src/strcmp.c",
+    "/nsprpub/lib/libc/src/strcpy.c",
+    "/nsprpub/lib/libc/src/strdup.c",
+    "/nsprpub/lib/libc/src/strlen.c",
+    "/nsprpub/lib/libc/src/strpbrk.c",
+    "/nsprpub/lib/libc/src/strstr.c",
+    "/nsprpub/lib/libc/src/strtok.c",
+]
diff --git a/config/external/nspr/moz.build b/config/external/nspr/moz.build
new file mode 100644
index 0000000000..f2b3d4e8c1
--- /dev/null
+++ b/config/external/nspr/moz.build
@@ -0,0 +1,28 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("nspr")
+
+if CONFIG["MOZ_BUILD_NSPR"]:
+    DIRS += [
+        "pr",
+        "ds",
+        "libc",
+    ]
+    if CONFIG["MOZ_FOLD_LIBS"]:
+        # When folding libraries, nspr is actually in the nss library.
+        USE_LIBS += [
+            "nss",
+        ]
+    else:
+        USE_LIBS += [
+            "nspr4",
+            "plc4",
+            "plds4",
+        ]
+    EXPORTS.nspr += ["prcpucfg.h"]
+else:
+    OS_LIBS += CONFIG["NSPR_LIBS"]
diff --git a/config/external/nspr/pr/moz.build b/config/external/nspr/pr/moz.build
new file mode 100644
index 0000000000..cf1ebf1cc0
--- /dev/null
+++ b/config/external/nspr/pr/moz.build
@@ -0,0 +1,254 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+if CONFIG["MOZ_FOLD_LIBS"]:
+    Library("nspr4")
+else:
+    SharedLibrary("nspr4")
+
+# We allow warnings for third-party code that can be updated from upstream.
+# TODO: fix NSPR warnings and remove this
+AllowCompilerWarnings()
+
+DEFINES["_NSPR_BUILD_"] = True
+if CONFIG["OS_ARCH"] == "Linux":
+    OS_LIBS += CONFIG["REALTIME_LIBS"]
+    DEFINES["LINUX"] = True
+    DEFINES["HAVE_FCNTL_FILE_LOCKING"] = True
+    DEFINES["HAVE_POINTER_LOCALTIME_R"] = True
+    DEFINES["_GNU_SOURCE"] = True
+    SOURCES += ["/nsprpub/pr/src/md/unix/linux.c"]
+    if CONFIG["TARGET_CPU"] == "x86_64":
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_Linux_x86_64.s"]
+    elif CONFIG["TARGET_CPU"] == "x86":
+        DEFINES["i386"] = True
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_Linux_x86.s"]
+    elif CONFIG["TARGET_CPU"] == "ppc":
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_Linux_ppc.s"]
+elif CONFIG["OS_TARGET"] in ("FreeBSD", "OpenBSD", "NetBSD"):
+    DEFINES["HAVE_BSD_FLOCK"] = True
+    DEFINES["HAVE_SOCKLEN_T"] = True
+    DEFINES["HAVE_POINTER_LOCALTIME_R"] = True
+    DEFINES[CONFIG["OS_TARGET"].upper()] = True
+    SOURCES += ["/nsprpub/pr/src/md/unix/%s.c" % CONFIG["OS_TARGET"].lower()]
+elif CONFIG["OS_TARGET"] == "Darwin":
+    OS_LIBS += ["-framework CoreServices"]
+    # See also IncreaseDescriptorLimits in toolkit/xre/nsAppRunner.cpp
+    DEFINES["FD_SETSIZE"] = 4096
+    DEFINES["_DARWIN_UNLIMITED_SELECT"] = True
+    DEFINES["HAS_CONNECTX"] = True
+    DEFINES["DARWIN"] = True
+    DEFINES["HAVE_BSD_FLOCK"] = True
+    DEFINES["HAVE_SOCKLEN_T"] = True
+    DEFINES["HAVE_POINTER_LOCALTIME_R"] = True
+    SOURCES += [
+        "/nsprpub/pr/src/md/unix/darwin.c",
+        "/nsprpub/pr/src/md/unix/os_Darwin.s",
+    ]
+    DEFINES["HAVE_CRT_EXTERNS_H"] = True
+elif CONFIG["OS_TARGET"] == "SunOS":
+    DEFINES["HAVE_FCNTL_FILE_LOCKING"] = True
+    DEFINES["HAVE_SOCKLEN_T"] = True
+    DEFINES["_PR_HAVE_OFF64_T"] = True
+    DEFINES["_PR_INET6"] = True
+    DEFINES["SOLARIS"] = True
+    SOURCES += ["/nsprpub/pr/src/md/unix/solaris.c"]
+    if CONFIG["TARGET_CPU"] == "x86_64":
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_SunOS_x86_64.s"]
+    elif CONFIG["TARGET_CPU"] == "x86":
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_SunOS_x86.s"]
+    elif CONFIG["TARGET_CPU"] == "sparc64":
+        ASFLAGS += ["-x", "assembler-with-cpp", "-D_ASM"]
+        SOURCES += ["/nsprpub/pr/src/md/unix/os_SunOS_sparcv9.s"]
+elif CONFIG["OS_TARGET"] == "WINNT":
+    OS_LIBS += [
+        "advapi32",
+        "wsock32",
+        "ws2_32",
+        "mswsock",
+        "winmm",
+    ]
+    DEFINES["XP_PC"] = True
+    DEFINES["WIN32"] = True
+    # For historical reasons we use the WIN95 NSPR target instead of
+    # WINNT.
+    DEFINES["WIN95"] = True
+    DEFINES["WINNT"] = False
+    DEFINES["_PR_GLOBAL_THREADS_ONLY"] = True
+    if not CONFIG["DEBUG"]:
+        DEFINES["DO_NOT_WAIT_FOR_CONNECT_OVERLAPPED_OPERATIONS"] = True
+    if CONFIG["TARGET_CPU"] == "x86_64":
+        DEFINES["_AMD64_"] = True
+    elif CONFIG["TARGET_CPU"] == "x86":
+        DEFINES["_X86_"] = True
+    elif CONFIG["TARGET_CPU"] == "aarch64":
+        DEFINES["_ARM64_"] = True
+    else:
+        error("Unsupported TARGET_CPU value: %s" % CONFIG["TARGET_CPU"])
+else:
+    error(
+        'Not a supported OS_TARGET for NSPR in moz.build: "%s". Use --with-system-nspr'
+        % CONFIG["OS_TARGET"]
+    )
+
+
+LOCAL_INCLUDES += [
+    "/config/external/nspr",
+    "/nsprpub/pr/include",
+    "/nsprpub/pr/include/private",
+]
+
+SOURCES += [
+    "/nsprpub/pr/src/io/prpolevt.c",  # conflicting definition of PRFilePrivate
+    "/nsprpub/pr/src/misc/praton.c",  # duplicate definition of index_hex
+]
+
+UNIFIED_SOURCES += [
+    "/nsprpub/pr/src/io/prfdcach.c",
+    "/nsprpub/pr/src/io/priometh.c",
+    "/nsprpub/pr/src/io/pripv6.c",
+    "/nsprpub/pr/src/io/prlayer.c",
+    "/nsprpub/pr/src/io/prlog.c",
+    "/nsprpub/pr/src/io/prmapopt.c",
+    "/nsprpub/pr/src/io/prmmap.c",
+    "/nsprpub/pr/src/io/prmwait.c",
+    "/nsprpub/pr/src/io/prprf.c",
+    "/nsprpub/pr/src/io/prscanf.c",
+    "/nsprpub/pr/src/io/prstdio.c",
+    "/nsprpub/pr/src/linking/prlink.c",
+    "/nsprpub/pr/src/malloc/prmalloc.c",
+    "/nsprpub/pr/src/malloc/prmem.c",
+    "/nsprpub/pr/src/md/prosdep.c",
+    "/nsprpub/pr/src/memory/prseg.c",
+    "/nsprpub/pr/src/memory/prshma.c",
+    "/nsprpub/pr/src/misc/pratom.c",
+    "/nsprpub/pr/src/misc/prdtoa.c",
+    "/nsprpub/pr/src/misc/prenv.c",
+    "/nsprpub/pr/src/misc/prerr.c",
+    "/nsprpub/pr/src/misc/prerror.c",
+    "/nsprpub/pr/src/misc/prerrortable.c",
+    "/nsprpub/pr/src/misc/prinit.c",
+    "/nsprpub/pr/src/misc/prinrval.c",
+    "/nsprpub/pr/src/misc/pripc.c",
+    "/nsprpub/pr/src/misc/prlog2.c",
+    "/nsprpub/pr/src/misc/prnetdb.c",
+    "/nsprpub/pr/src/misc/prrng.c",
+    "/nsprpub/pr/src/misc/prsystem.c",
+    "/nsprpub/pr/src/misc/prtime.c",
+    "/nsprpub/pr/src/misc/prtpool.c",
+    "/nsprpub/pr/src/threads/prcmon.c",
+    "/nsprpub/pr/src/threads/prrwlock.c",
+    "/nsprpub/pr/src/threads/prtpd.c",
+]
+
+if CONFIG["OS_TARGET"] != "WINNT":
+    DEFINES["_PR_PTHREADS"] = True
+    UNIFIED_SOURCES += [
+        "/nsprpub/pr/src/md/unix/unix.c",
+        "/nsprpub/pr/src/md/unix/unix_errors.c",
+        "/nsprpub/pr/src/md/unix/uxproces.c",
+        "/nsprpub/pr/src/md/unix/uxrng.c",
+        "/nsprpub/pr/src/md/unix/uxshm.c",
+        "/nsprpub/pr/src/pthreads/ptio.c",
+        "/nsprpub/pr/src/pthreads/ptmisc.c",
+        "/nsprpub/pr/src/pthreads/ptsynch.c",
+        "/nsprpub/pr/src/pthreads/ptthread.c",
+    ]
+else:
+    SOURCES += [
+        # ntinrval.c needs windows.h without WIN32_LEAN_AND_MEAN, so it can't be
+        # unified after any file that pulled in windows.h in lean-and-mean mode.
+        "/nsprpub/pr/src/md/windows/ntinrval.c",
+        # w32poll.c needs a custom value of FD_SETSIZE for winsock.h.
+        "/nsprpub/pr/src/md/windows/w32poll.c",
+        # w95sock.c needs winsock2.h which conflicts with winsock.h.
+        "/nsprpub/pr/src/md/windows/w95sock.c",
+    ]
+    UNIFIED_SOURCES += [
+        "/nsprpub/pr/src/io/prdir.c",
+        "/nsprpub/pr/src/io/prfile.c",
+        "/nsprpub/pr/src/io/prio.c",
+        "/nsprpub/pr/src/io/prsocket.c",
+        "/nsprpub/pr/src/md/windows/ntgc.c",
+        "/nsprpub/pr/src/md/windows/ntmisc.c",
+        "/nsprpub/pr/src/md/windows/ntsec.c",
+        "/nsprpub/pr/src/md/windows/ntsem.c",
+        "/nsprpub/pr/src/md/windows/w32ipcsem.c",
+        "/nsprpub/pr/src/md/windows/w32rng.c",
+        "/nsprpub/pr/src/md/windows/w32shm.c",
+        "/nsprpub/pr/src/md/windows/w95cv.c",
+        "/nsprpub/pr/src/md/windows/w95dllmain.c",
+        "/nsprpub/pr/src/md/windows/w95io.c",
+        "/nsprpub/pr/src/md/windows/w95thred.c",
+        "/nsprpub/pr/src/md/windows/win32_errors.c",
+        "/nsprpub/pr/src/misc/pripcsem.c",
+        "/nsprpub/pr/src/threads/combined/prucpu.c",
+        "/nsprpub/pr/src/threads/combined/prucv.c",
+        "/nsprpub/pr/src/threads/combined/prulock.c",
+        "/nsprpub/pr/src/threads/combined/prustack.c",
+        "/nsprpub/pr/src/threads/combined/pruthr.c",
+        "/nsprpub/pr/src/threads/prcthr.c",
+        "/nsprpub/pr/src/threads/prdump.c",
+        "/nsprpub/pr/src/threads/prmon.c",
+        "/nsprpub/pr/src/threads/prsem.c",
+    ]
+
+EXPORTS.nspr += [
+    "/nsprpub/pr/include/nspr.h",
+    "/nsprpub/pr/include/pratom.h",
+    "/nsprpub/pr/include/prbit.h",
+    "/nsprpub/pr/include/prclist.h",
+    "/nsprpub/pr/include/prcmon.h",
+    "/nsprpub/pr/include/prcvar.h",
+    "/nsprpub/pr/include/prdtoa.h",
+    "/nsprpub/pr/include/prenv.h",
+    "/nsprpub/pr/include/prerr.h",
+    "/nsprpub/pr/include/prerror.h",
+    "/nsprpub/pr/include/prinet.h",
+    "/nsprpub/pr/include/prinit.h",
+    "/nsprpub/pr/include/prinrval.h",
+    "/nsprpub/pr/include/prio.h",
+    "/nsprpub/pr/include/pripcsem.h",
+    "/nsprpub/pr/include/prlink.h",
+    "/nsprpub/pr/include/prlock.h",
+    "/nsprpub/pr/include/prlog.h",
+    "/nsprpub/pr/include/prlong.h",
+    "/nsprpub/pr/include/prmem.h",
+    "/nsprpub/pr/include/prmon.h",
+    "/nsprpub/pr/include/prmwait.h",
+    "/nsprpub/pr/include/prnetdb.h",
+    "/nsprpub/pr/include/prpdce.h",
+    "/nsprpub/pr/include/prprf.h",
+    "/nsprpub/pr/include/prproces.h",
+    "/nsprpub/pr/include/prrng.h",
+    "/nsprpub/pr/include/prrwlock.h",
+    "/nsprpub/pr/include/prshm.h",
+    "/nsprpub/pr/include/prshma.h",
+    "/nsprpub/pr/include/prsystem.h",
+    "/nsprpub/pr/include/prthread.h",
+    "/nsprpub/pr/include/prtime.h",
+    "/nsprpub/pr/include/prtpool.h",
+    "/nsprpub/pr/include/prtrace.h",
+    "/nsprpub/pr/include/prtypes.h",
+    "/nsprpub/pr/include/prvrsion.h",
+    "/nsprpub/pr/include/prwin16.h",
+]
+
+EXPORTS.nspr.md += [
+    "/nsprpub/pr/include/md/_darwin.cfg",
+    "/nsprpub/pr/include/md/_freebsd.cfg",
+    "/nsprpub/pr/include/md/_linux.cfg",
+    "/nsprpub/pr/include/md/_netbsd.cfg",
+    "/nsprpub/pr/include/md/_openbsd.cfg",
+    "/nsprpub/pr/include/md/_solaris.cfg",
+    "/nsprpub/pr/include/md/_win95.cfg",
+]
+
+EXPORTS.nspr.private += [
+    "/nsprpub/pr/include/private/pprio.h",
+    "/nsprpub/pr/include/private/pprthred.h",
+    "/nsprpub/pr/include/private/prpriv.h",
+]
diff --git a/config/external/nspr/prcpucfg.h b/config/external/nspr/prcpucfg.h
new file mode 100644
index 0000000000..e5c5aeead9
--- /dev/null
+++ b/config/external/nspr/prcpucfg.h
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef NSPR_PRCPUCFG_H_
+#define NSPR_PRCPUCFG_H_
+
+/*
+ * Need to support conditionals that are defined in both the top-level build
+ * system as well as NSS' build system for now.
+ */
+#if defined(XP_DARWIN) || defined(DARWIN)
+#  include "md/_darwin.cfg"
+#elif defined(XP_WIN) || defined(_WINDOWS)
+#  include "md/_win95.cfg"
+#elif defined(__FreeBSD__)
+#  include "md/_freebsd.cfg"
+#elif defined(__NetBSD__)
+#  include "md/_netbsd.cfg"
+#elif defined(__OpenBSD__)
+#  include "md/_openbsd.cfg"
+#elif defined(__linux__)
+#  include "md/_linux.cfg"
+#elif defined(__sun__)
+#  include "md/_solaris.cfg"
+#else
+#  error "Unsupported platform!"
+#endif
+
+#endif /* NSPR_PRCPUCFG_H_ */
diff --git a/config/external/rlbox/moz.build b/config/external/rlbox/moz.build
new file mode 100644
index 0000000000..28b09d3314
--- /dev/null
+++ b/config/external/rlbox/moz.build
@@ -0,0 +1,31 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "Security: RLBox")
+
+EXPORTS.mozilla.rlbox += [
+    "/third_party/rlbox/include/rlbox.hpp",
+    "/third_party/rlbox/include/rlbox_app_pointer.hpp",
+    "/third_party/rlbox/include/rlbox_conversion.hpp",
+    "/third_party/rlbox/include/rlbox_helpers.hpp",
+    "/third_party/rlbox/include/rlbox_noop_sandbox.hpp",
+    "/third_party/rlbox/include/rlbox_policy_types.hpp",
+    "/third_party/rlbox/include/rlbox_range.hpp",
+    "/third_party/rlbox/include/rlbox_sandbox.hpp",
+    "/third_party/rlbox/include/rlbox_stdlib.hpp",
+    "/third_party/rlbox/include/rlbox_stdlib_polyfill.hpp",
+    "/third_party/rlbox/include/rlbox_struct_support.hpp",
+    "/third_party/rlbox/include/rlbox_type_traits.hpp",
+    "/third_party/rlbox/include/rlbox_types.hpp",
+    "/third_party/rlbox/include/rlbox_unwrap.hpp",
+    "/third_party/rlbox/include/rlbox_wrapper_traits.hpp",
+    "rlbox_config.h",
+]
+
+SOURCES += ["rlbox_thread_locals.cpp"]
+
+FINAL_LIBRARY = "xul"
diff --git a/config/external/rlbox/rlbox_config.h b/config/external/rlbox/rlbox_config.h
new file mode 100644
index 0000000000..c9aa34e4db
--- /dev/null
+++ b/config/external/rlbox/rlbox_config.h
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef RLBOX_CONFIG
+#define RLBOX_CONFIG
+
+#include "mozilla/Assertions.h"
+
+// All uses of rlbox's function and callbacks invocations are on a single
+// thread right now, so we disable rlbox thread checks for performance
+// See (Bug 1739298) for more details
+#define RLBOX_SINGLE_THREADED_INVOCATIONS
+
+#define RLBOX_CUSTOM_ABORT(msg) MOZ_CRASH_UNSAFE_PRINTF("RLBox crash: %s", msg)
+
+// The MingW compiler does not correctly handle static thread_local inline
+// members. This toggles a workaround that allows the host application (firefox)
+// to provide TLS storage via functions. This can be removed if the MingW bug is
+// fixed.
+#define RLBOX_EMBEDDER_PROVIDES_TLS_STATIC_VARIABLES
+
+// When instantiating a wasm sandbox, rlbox requires the name of the wasm module
+// being instantiated. LLVM and wasm2c use the module name by choosing the name
+// used to generate the wasm file. In Firefox this is a static library called
+// rlbox
+#define RLBOX_WASM2C_MODULE_NAME rlbox
+
+#endif
diff --git a/config/external/rlbox/rlbox_thread_locals.cpp b/config/external/rlbox/rlbox_thread_locals.cpp
new file mode 100644
index 0000000000..157177c0e0
--- /dev/null
+++ b/config/external/rlbox/rlbox_thread_locals.cpp
@@ -0,0 +1,17 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Load general firefox configuration of RLBox
+#include "mozilla/rlbox/rlbox_config.h"
+
+#define RLBOX_USE_STATIC_CALLS() rlbox_noop_sandbox_lookup_symbol
+#include "mozilla/rlbox/rlbox_noop_sandbox.hpp"
+
+#include "mozilla/rlbox/rlbox.hpp"
+
+// The MingW compiler does not correctly handle static thread_local inline
+// members. We instead TLS storage via functions. This can be removed if the
+// MingW bug is fixed.
+RLBOX_NOOP_SANDBOX_STATIC_VARIABLES();
diff --git a/config/external/rlbox_wasm2c_sandbox/moz.build b/config/external/rlbox_wasm2c_sandbox/moz.build
new file mode 100644
index 0000000000..4600f12c19
--- /dev/null
+++ b/config/external/rlbox_wasm2c_sandbox/moz.build
@@ -0,0 +1,27 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "Security: RLBox")
+
+EXPORTS.mozilla.rlbox += [
+    "/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_sandbox.hpp",
+    "/third_party/rlbox_wasm2c_sandbox/include/rlbox_wasm2c_tls.hpp",
+]
+EXPORTS += [
+    "/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_mem.h",
+    "/third_party/rlbox_wasm2c_sandbox/include/wasm2c_rt_minwasi.h",
+]
+
+SOURCES += [
+    "/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_mem.c",
+    "/third_party/rlbox_wasm2c_sandbox/src/wasm2c_rt_minwasi.c",
+    "rlbox_wasm2c_thread_locals.cpp",
+]
+
+LOCAL_INCLUDES += ["/third_party/wasm2c/wasm2c/"]
+
+FINAL_LIBRARY = "xul"
diff --git a/config/external/rlbox_wasm2c_sandbox/moz.yaml b/config/external/rlbox_wasm2c_sandbox/moz.yaml
new file mode 100644
index 0000000000..dd4e660052
--- /dev/null
+++ b/config/external/rlbox_wasm2c_sandbox/moz.yaml
@@ -0,0 +1,31 @@
+schema: 1
+
+bugzilla:
+  product: Core
+  component: "General"
+
+origin:
+  name: rlbox_wasm2c_sandbox
+  description: rlbox integration for the wasm2c sandboxed code
+  url: https://github.com/PLSysSec/rlbox_wasm2c_sandbox/tree/upstream-wasm2c
+
+  release: 0938ae96c5467bdf2210cf21be47ae576cbcc3cd (2023-08-29T00:00:41Z).
+  revision: 0938ae96c5467bdf2210cf21be47ae576cbcc3cd
+
+  license: MIT
+  license-file: LICENSE
+
+vendoring:
+  url: https://github.com/PLSysSec/rlbox_wasm2c_sandbox
+  source-hosting: github
+  vendor-directory: third_party/rlbox_wasm2c_sandbox
+
+  exclude:
+    # dirs
+    - test
+    # files
+    - ".*"
+    - AppSandbox.md
+    - CMakeLists.txt
+    - LibrarySandbox.md
+    - README.md
diff --git a/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp b/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp
new file mode 100644
index 0000000000..0fadb5af40
--- /dev/null
+++ b/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef MOZ_USING_WASM_SANDBOXING
+
+// For MOZ_CRASH_UNSAFE_PRINTF
+#  include "mozilla/Assertions.h"
+
+#  include "mozilla/mozalloc_oom.h"
+
+// Load general firefox configuration of RLBox
+#  include "mozilla/rlbox/rlbox_config.h"
+#  include "mozilla/rlbox/rlbox_wasm2c_tls.hpp"
+#  include "wasm-rt.h"
+
+#  ifndef WASM_RT_GROW_FAILED_CRASH
+#    include "nsExceptionHandler.h"
+#  endif
+
+// The MingW compiler does not correctly handle static thread_local inline
+// members. We instead TLS storage via functions. This can be removed if the
+// MingW bug is fixed.
+RLBOX_WASM2C_SANDBOX_STATIC_VARIABLES();
+
+extern "C" {
+
+// Any error encountered by the wasm2c runtime or wasm sandboxed library code
+// is configured to call the below trap handler.
+void moz_wasm2c_trap_handler(wasm_rt_trap_t code) {
+  MOZ_CRASH_UNSAFE_PRINTF("wasm2c crash: %s", wasm_rt_strerror(code));
+}
+
+// The below function is called if a malloc in sandboxed code returns null
+// This indicates that the sandbox has run out of memory.
+void moz_wasm2c_memgrow_failed() {
+#  ifdef WASM_RT_GROW_FAILED_CRASH
+  MOZ_CRASH("wasm2c memory grow failed");
+#  else
+  CrashReporter::AnnotateCrashReport(
+      CrashReporter::Annotation::WasmLibrarySandboxMallocFailed, true);
+#  endif
+}
+
+// This function is called when mozalloc_handle_oom is called from within
+// the sandbox. We redirect to that function, ignoring the ctx argument, which
+// is the sandbox itself.
+void w2c_env_mozalloc_handle_oom(void* ctx, uint32_t size) {
+  mozalloc_handle_oom(size);
+}
+}
+
+#endif
diff --git a/config/external/sqlite/moz.build b/config/external/sqlite/moz.build
new file mode 100644
index 0000000000..6294924c56
--- /dev/null
+++ b/config/external/sqlite/moz.build
@@ -0,0 +1,18 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+DIRS += ["../../../third_party/sqlite3/src"]
+if CONFIG["MOZ_FOLD_LIBS"]:
+    Library("sqlite")
+    # When folding libraries, sqlite is actually in the nss library.
+    USE_LIBS += [
+        "nss",
+    ]
+else:
+    SharedLibrary("sqlite")
+    SHARED_LIBRARY_NAME = "mozsqlite3"
+
+    SYMBOLS_FILE = "/third_party/sqlite3/src/sqlite.symbols"
diff --git a/config/external/wasm2c_sandbox_compiler/moz.build b/config/external/wasm2c_sandbox_compiler/moz.build
new file mode 100644
index 0000000000..1ec6490a78
--- /dev/null
+++ b/config/external/wasm2c_sandbox_compiler/moz.build
@@ -0,0 +1,82 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Core", "Security: RLBox")
+
+LOCAL_INCLUDES += [
+    "/third_party/picosha2/",
+    "/third_party/wasm2c/include/",
+]
+
+GeneratedFile(
+    "wabt/config.h",
+    script="preprocess_wasm2c_config.py",
+    entry_point="generate_config",
+    inputs=["/third_party/wasm2c/src/config.h.in"],
+)
+
+# Wabt sources
+HOST_SOURCES += [
+    "/third_party/wasm2c/src/apply-names.cc",
+    "/third_party/wasm2c/src/binary-reader-ir.cc",
+    "/third_party/wasm2c/src/binary-reader-logging.cc",
+    "/third_party/wasm2c/src/binary-reader-objdump.cc",
+    "/third_party/wasm2c/src/binary-reader-opcnt.cc",
+    "/third_party/wasm2c/src/binary-reader.cc",
+    "/third_party/wasm2c/src/binary-writer-spec.cc",
+    "/third_party/wasm2c/src/binary-writer.cc",
+    "/third_party/wasm2c/src/binary.cc",
+    "/third_party/wasm2c/src/binding-hash.cc",
+    "/third_party/wasm2c/src/color.cc",
+    "/third_party/wasm2c/src/common.cc",
+    "/third_party/wasm2c/src/config.cc",
+    "/third_party/wasm2c/src/decompiler.cc",
+    "/third_party/wasm2c/src/emscripten-helpers.cc",
+    "/third_party/wasm2c/src/error-formatter.cc",
+    "/third_party/wasm2c/src/expr-visitor.cc",
+    "/third_party/wasm2c/src/feature.cc",
+    "/third_party/wasm2c/src/filenames.cc",
+    "/third_party/wasm2c/src/generate-names.cc",
+    "/third_party/wasm2c/src/ir-util.cc",
+    "/third_party/wasm2c/src/ir.cc",
+    "/third_party/wasm2c/src/leb128.cc",
+    "/third_party/wasm2c/src/lexer-source-line-finder.cc",
+    "/third_party/wasm2c/src/lexer-source.cc",
+    "/third_party/wasm2c/src/literal.cc",
+    "/third_party/wasm2c/src/opcode-code-table.c",
+    "/third_party/wasm2c/src/opcode.cc",
+    "/third_party/wasm2c/src/option-parser.cc",
+    "/third_party/wasm2c/src/resolve-names.cc",
+    "/third_party/wasm2c/src/sha256.cc",
+    "/third_party/wasm2c/src/shared-validator.cc",
+    "/third_party/wasm2c/src/stream.cc",
+    "/third_party/wasm2c/src/token.cc",
+    "/third_party/wasm2c/src/tracing.cc",
+    "/third_party/wasm2c/src/type-checker.cc",
+    "/third_party/wasm2c/src/utf8.cc",
+    "/third_party/wasm2c/src/validator.cc",
+    "/third_party/wasm2c/src/wast-lexer.cc",
+    "/third_party/wasm2c/src/wast-parser.cc",
+    "/third_party/wasm2c/src/wat-writer.cc",
+]
+
+# wasm2c sources
+HOST_SOURCES += [
+    "/third_party/wasm2c/src/c-writer.cc",
+    "/third_party/wasm2c/src/prebuilt/wasm2c_header_bottom.cc",
+    "/third_party/wasm2c/src/prebuilt/wasm2c_header_top.cc",
+    "/third_party/wasm2c/src/prebuilt/wasm2c_simd_source_declarations.cc",
+    "/third_party/wasm2c/src/prebuilt/wasm2c_source_declarations.cc",
+    "/third_party/wasm2c/src/prebuilt/wasm2c_source_includes.cc",
+    "/third_party/wasm2c/src/tools/wasm2c.cc",
+]
+
+HOST_CXXFLAGS += [
+    "-Wno-implicit-fallthrough",
+]
+
+HostProgram("wasm2c")
diff --git a/config/external/wasm2c_sandbox_compiler/moz.yaml b/config/external/wasm2c_sandbox_compiler/moz.yaml
new file mode 100644
index 0000000000..cbc6938025
--- /dev/null
+++ b/config/external/wasm2c_sandbox_compiler/moz.yaml
@@ -0,0 +1,47 @@
+schema: 1
+
+bugzilla:
+  product: Core
+  component: "General"
+
+origin:
+  name: wasm2c_sandbox_compiler
+  description: wasm2c fork used for rlbox sandboxing
+  url: https://github.com/WebAssembly/wabt
+
+  release: 963f973469b45969ce198e0c86d3af316790a780 (2023-05-12T21:56:46Z).
+  revision: 963f973469b45969ce198e0c86d3af316790a780
+
+  license: Apache-2.0
+  license-file: LICENSE
+
+vendoring:
+  url: https://github.com/WebAssembly/wabt
+  source-hosting: github
+  vendor-directory: third_party/wasm2c
+  exclude:
+    # dirs
+    - cmake
+    - docs
+    - fuzz-in
+    - include/wabt/interp
+    - man
+    - scripts
+    - src/interp
+    - src/template
+    - test
+    - third_party
+    - wasm2c/examples
+    # files
+    - .*
+    - CMakeLists.txt
+    - Contributing.md
+    - Makefile
+    - README.md
+    - ubsan.blacklist
+    - src/tools/s*
+    - src/tools/wasm-*
+    - src/tools/wast*
+    - src/tools/wat*
+    - src/tools/wasm2w*
+    - wasm2c/wasm-rt-exceptions*
diff --git a/config/external/wasm2c_sandbox_compiler/preprocess_wasm2c_config.py b/config/external/wasm2c_sandbox_compiler/preprocess_wasm2c_config.py
new file mode 100644
index 0000000000..3edb8f4e06
--- /dev/null
+++ b/config/external/wasm2c_sandbox_compiler/preprocess_wasm2c_config.py
@@ -0,0 +1,139 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Souce Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distibuted with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+import itertools
+
+# The wasm2c source relies on CMAKE to generate a config file to be used to build the project
+# Since we do not use cmake, this script automates the generation of a similar config suitable
+# for firefox builds
+# The script has a list of known variables it can replace and throws an error if it encounters a
+# new variable (for instance when the in-tree source is updated)
+
+# This python script knows how to replace the following variables normally configured by cmake for
+# the wasm2c source
+known_vars = [
+    '#cmakedefine WABT_VERSION_STRING "@WABT_VERSION_STRING@"',
+    "#cmakedefine WABT_DEBUG @WABT_DEBUG@",
+    "#cmakedefine01 HAVE_ALLOCA_H",
+    "#cmakedefine01 HAVE_UNISTD_H",
+    "#cmakedefine01 HAVE_SNPRINTF",
+    "#cmakedefine01 HAVE_SSIZE_T",
+    "#cmakedefine01 HAVE_STRCASECMP",
+    "#cmakedefine01 HAVE_WIN32_VT100",
+    "#cmakedefine01 WABT_BIG_ENDIAN",
+    "#cmakedefine01 HAVE_OPENSSL_SHA_H",
+    "#cmakedefine01 COMPILER_IS_CLANG",
+    "#cmakedefine01 COMPILER_IS_GNU",
+    "#cmakedefine01 COMPILER_IS_MSVC",
+    "#cmakedefine01 WITH_EXCEPTIONS",
+    "#define SIZEOF_SIZE_T @SIZEOF_SIZE_T@",
+]
+
+# The above variables are replaced with the code shown below
+replaced_variables = """
+// mozilla-config.h defines the following which is used
+// - HAVE_ALLOCA_H
+// - HAVE_UNISTD_H
+#include "mozilla-config.h"
+
+#define WABT_VERSION_STRING "Firefox-in-tree-version"
+
+#define WABT_DEBUG 0
+
+/* We don't require color printing of wasm2c errors on any platform */
+#define HAVE_WIN32_VT100 0
+
+#ifdef _WIN32
+  // Ignore whatever is set in mozilla-config.h wrt alloca because it is
+  // wrong when cross-compiling on Windows.
+  #undef HAVE_ALLOCA_H
+  // It is wrong when cross-compiling on Windows.
+  #undef HAVE_UNISTD_H
+  /* Whether ssize_t is defined by stddef.h */
+  #define HAVE_SSIZE_T 0
+  /* Whether strcasecmp is defined by strings.h */
+  #define HAVE_STRCASECMP 0
+#else
+  #define HAVE_SSIZE_T 1
+  #define HAVE_STRCASECMP 1
+#endif
+
+#if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__)
+#  if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#    define WABT_BIG_ENDIAN 0
+#  elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#    define WABT_BIG_ENDIAN 1
+#  else
+#    error "Can't handle mixed-endian architectures"
+#  endif
+#else
+#  error "Don't know how to determine endianness"
+#endif
+
+/* Use internal Pico-SHA. Never use OpenSSL */
+#define HAVE_OPENSSL_SHA_H 0
+
+/* Whether snprintf is defined by stdio.h */
+#define HAVE_SNPRINTF 1
+
+#if defined(_MSC_VER)
+  #define COMPILER_IS_GNU 0
+  #define COMPILER_IS_CLANG 0
+  #define COMPILER_IS_MSVC 1
+#elif defined(__GNUC__)
+  #if defined(__clang__)
+    #define COMPILER_IS_GNU 0
+    #define COMPILER_IS_CLANG 1
+    #define COMPILER_IS_MSVC 0
+  #else
+    #define COMPILER_IS_GNU 1
+    #define COMPILER_IS_CLANG 0
+    #define COMPILER_IS_MSVC 0
+  #endif
+#else
+  #error "Unknown compiler"
+#endif
+
+#define WITH_EXCEPTIONS 0
+
+#if SIZE_MAX == 0xffffffffffffffff
+  #define SIZEOF_SIZE_T 8
+#elif SIZE_MAX == 0xffffffff
+  #define SIZEOF_SIZE_T 4
+#else
+  #error "Unknown size of size_t"
+#endif
+"""
+
+
+def generate_config(output, config_h_in):
+    file_config_h_in = open(config_h_in, "r")
+    lines = file_config_h_in.readlines()
+
+    # Remove the known cmake variables
+    for known_var in known_vars:
+        lines = [x for x in lines if not x.startswith(known_var)]
+
+    # Do a sanity check to make sure there are no unknown variables
+    remaining_vars = [x for x in lines if x.startswith("#cmakedefine") or "@" in x]
+    if len(remaining_vars) > 0:
+        raise BaseException("Unknown cmake variables: " + str(remaining_vars))
+
+    pos = lines.index("#define WABT_CONFIG_H_\n")
+    skipped = itertools.takewhile(
+        lambda x: not (x.strip()) or x.startswith("#include "), lines[pos + 1 :]
+    )
+    pos += len(list(skipped))
+    pre_include_lines = lines[0:pos]
+    post_include_lines = lines[pos:]
+    output_str = (
+        "".join(pre_include_lines)
+        + "\n"
+        + replaced_variables
+        + "\n"
+        + "".join(post_include_lines)
+    )
+    output.write(output_str)
diff --git a/config/external/zlib/moz.build b/config/external/zlib/moz.build
new file mode 100644
index 0000000000..755400fa7f
--- /dev/null
+++ b/config/external/zlib/moz.build
@@ -0,0 +1,21 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+Library("zlib")
+
+if CONFIG["MOZ_SYSTEM_ZLIB"]:
+    OS_LIBS += CONFIG["MOZ_ZLIB_LIBS"]
+else:
+    if CONFIG["ZLIB_IN_MOZGLUE"]:
+        # Can't do this until mozglue is handled by moz.build instead of
+        # config/rules.mk.
+        # USE_LIBS += [
+        #     'mozglue'
+        # ]
+        pass
+    DIRS += [
+        "../../../modules/zlib",
+    ]