1 files changed, 67 insertions, 0 deletions
diff --git a/js/ffi.configure b/js/ffi.configure
new file mode 100644
index 0000000000..ec4e572c7a
--- /dev/null
+++ b/js/ffi.configure
@@ -0,0 +1,67 @@
+# -*- 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/.
+
+
+@depends(target)
+def force_system_ffi(target):
+    # Pre-emptively move to system ffi for non-tier one platforms.
+    if target.cpu not in ("x86", "x86_64", "arm", "aarch64"):
+        return True
+
+
+imply_option("--with-system-ffi", force_system_ffi, "target")
+
+system_lib_option(
+    "--with-system-ffi", help="Use system libffi (located with pkgconfig)"
+)
+
+use_system_ffi = depends_if("--with-system-ffi")(lambda _: True)
+
+system_ffi = pkg_check_modules("MOZ_FFI", "libffi > 3.0.9", when=use_system_ffi)
+
+building_ffi = depends(system_ffi)(lambda v: v is None)
+
+set_config("MOZ_SYSTEM_FFI", depends_if(system_ffi)(lambda _: True))
+
+# Target selection, based on ffi/configure.ac.
+@depends(target, when=building_ffi)
+def ffi_target(target):
+    if target.cpu not in ("x86", "x86_64", "arm", "aarch64"):
+        die(
+            "Building libffi from the tree is not supported on this platform. "
+            "Use --with-system-ffi instead."
+        )
+
+    if target.cpu == "x86_64":
+        target_dir = "x86"
+        target_name = {
+            "WINNT": "X86_WIN64",
+        }.get(target.kernel, "X86_64")
+
+    elif target.cpu == "x86":
+        target_dir = "x86"
+        target_name = {
+            "WINNT": "X86_WIN32",
+            "Darwin": "X86_DARWIN",
+            "FreeBSD": "X86_FREEBSD",
+            "OpenBSD": "X86_FREEBSD",
+        }.get(target.kernel, "X86")
+
+    elif target.cpu == "aarch64":
+        target_dir = "aarch64"
+        target_name = {
+            "WINNT": "ARM_WIN64",
+        }.get(target.kernel, "AARCH64")
+
+    elif target.cpu == "arm":
+        target_dir = "arm"
+        target_name = "ARM"
+
+    return namespace(name=target_name, dir=target_dir)
+
+
+set_config("FFI_TARGET", ffi_target.name)
+set_config("FFI_TARGET_DIR", ffi_target.dir)