1 files changed, 60 insertions, 0 deletions
diff --git a/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh b/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh
new file mode 100755
index 0000000000..1c9faa4b9b
--- /dev/null
+++ b/taskcluster/scripts/misc/wr-macos-cross-build-setup.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+set -x -e -v
+
+export TARGET_TRIPLE="x86_64-apple-darwin"
+
+MACOS_SYSROOT="${MOZ_FETCHES_DIR}/MacOSX13.3.sdk"
+CLANGDIR="${MOZ_FETCHES_DIR}/clang"
+
+# Deploy the wrench dependencies
+mv ${MOZ_FETCHES_DIR}/wrench-deps/{vendor,.cargo} "${GECKO_PATH}/gfx/wr/"
+
+# Building wrench with the `headless` feature also builds the osmesa-src crate,
+# which includes building C++ code. We have to do a bunch of shenanigans
+# to make this cross-compile properly.
+
+pushd "${MOZ_FETCHES_DIR}/clang/bin"
+
+# Add a pkg-config cross-compile wrapper. Without this, the configure script
+# will use pkg-config from the host, which will find host libraries that are
+# not what we want. This script stolen from
+# https://autotools.io/pkgconfig/cross-compiling.html
+cat > ${TARGET_TRIPLE}-pkg-config <<END_PKGCONFIG_WRAPPER
+#!/bin/sh
+export PKG_CONFIG_DIR=
+export PKG_CONFIG_LIBDIR=${MACOS_SYSROOT}/usr/lib/pkgconfig:${MACOS_SYSROOT}/usr/share/pkgconfig
+export PKG_CONFIG_SYSROOT_DIR=${MACOS_SYSROOT}
+exec pkg-config "\$@"
+END_PKGCONFIG_WRAPPER
+chmod +x "${TARGET_TRIPLE}-pkg-config"
+popd
+
+[ -d "${MOZ_FETCHES_DIR}/clang-mac/clang" ] && cat > ${MOZ_FETCHES_DIR}/clang-mac/clang/bin/llvm-config <<EOF_LLVM_CONFIG
+#!/bin/sh
+${MOZ_FETCHES_DIR}/clang/bin/llvm-config "\$@" | sed 's,${MOZ_FETCHES_DIR}/clang,${MOZ_FETCHES_DIR}/clang-mac/clang,g;s,-lLLVM-[0-9]\+,-lLLVM,g'
+EOF_LLVM_CONFIG
+
+export PATH="${MOZ_FETCHES_DIR}/rustc/bin:${MOZ_FETCHES_DIR}/clang/bin:${MOZ_FETCHES_DIR}/wrench-deps/meson:${PATH}"
+
+# Tell the configure script where to find zlib, because otherwise it tries
+# to use pkg-config to find it, which fails (no .pc file in the macos SDK).
+export ZLIB_CFLAGS="-I${MACOS_SYSROOT}/usr/include"
+export ZLIB_LIBS="-L${MACOS_SYSROOT}/usr/lib -lz"
+
+# Set up compiler and flags for cross-compile. Careful to only export the
+# target-specific CFLAGS/CXXFLAGS variables, to not break any host builds.
+export CC="${CLANGDIR}/bin/clang"
+TARGET_CFLAGS="-fuse-ld=lld -target ${TARGET_TRIPLE} -mmacosx-version-min=10.12 --rtlib=compiler-rt --sysroot ${MACOS_SYSROOT} -Qunused-arguments"
+export CFLAGS_${TARGET_TRIPLE//-/_}="${TARGET_CFLAGS}"
+export CXX="${CLANGDIR}/bin/clang++"
+TARGET_CXXFLAGS="-fuse-ld=lld -target ${TARGET_TRIPLE} -mmacosx-version-min=10.12 --rtlib=compiler-rt --sysroot ${MACOS_SYSROOT} -stdlib=libc++ -Qunused-arguments"
+export CXXFLAGS_${TARGET_TRIPLE//-/_}="${TARGET_CXXFLAGS}"
+export AR="${CLANGDIR}/bin/llvm-ar"
+
+# See documentation in cargo-linker for why we need this. TL;DR is that passing
+# the right arguments to the linker when invoked by cargo is nigh impossible
+# without this.
+export MOZ_CARGO_WRAP_LD="${CC}"
+export MOZ_CARGO_WRAP_LD_CXX="${CXX}"
+export MOZ_CARGO_WRAP_LDFLAGS="${TARGET_CFLAGS}"
+export CARGO_TARGET_X86_64_APPLE_DARWIN_LINKER="${GECKO_PATH}/build/cargo-linker"