1 files changed, 311 insertions, 0 deletions
diff --git a/taskcluster/scripts/misc/build-clang-mingw.sh b/taskcluster/scripts/misc/build-clang-mingw.sh
new file mode 100755
index 0000000000..7dc7843de7
--- /dev/null
+++ b/taskcluster/scripts/misc/build-clang-mingw.sh
@@ -0,0 +1,311 @@
+#!/bin/bash
+set -x -e -v
+
+# This script is for building a mingw-clang toolchain for use on Linux.
+
+if [[ $# -eq 0 ]]; then
+    echo "Provide either x86 or x64 to specify a toolchain."
+    exit 1;
+elif [ "$1" == "x86" ]; then
+  machine="i686"
+  compiler_rt_machine="i386"
+  crt_flags="--enable-lib32 --disable-lib64"
+  WRAPPER_FLAGS=""
+elif [ "$1" == "x64" ]; then
+  machine="x86_64"
+  compiler_rt_machine="x86_64"
+  crt_flags="--disable-lib32 --enable-lib64"
+  WRAPPER_FLAGS=""
+else
+  echo "Provide either x86 or x64 to specify a toolchain."
+  exit 1;
+fi
+
+TOOLCHAIN_DIR=$MOZ_FETCHES_DIR/llvm-project
+INSTALL_DIR=$TOOLCHAIN_DIR/build/stage4/clang
+CROSS_PREFIX_DIR=$INSTALL_DIR/$machine-w64-mingw32
+
+make_flags="-j$(nproc)"
+
+if [ -d "$MOZ_FETCHES_DIR/binutils/bin" ]; then
+  export PATH="$MOZ_FETCHES_DIR/binutils/bin:$PATH"
+fi
+
+# This is default value of _WIN32_WINNT. Gecko configure script explicitly sets this,
+# so this is not used to build Gecko itself. We default to 0x601, which is Windows 7.
+default_win32_winnt=0x601
+
+cd $GECKO_PATH
+
+patch_file1="$(pwd)/taskcluster/scripts/misc/mingw-winrt.patch"
+patch_file2="$(pwd)/taskcluster/scripts/misc/mingw-dwrite_3.patch"
+
+prepare() {
+  pushd $MOZ_FETCHES_DIR/mingw-w64
+  patch -p1 <$patch_file1
+  patch -p1 <$patch_file2
+  popd
+}
+
+install_wrappers() {
+  pushd $INSTALL_DIR/bin
+
+  compiler_flags="--sysroot \$DIR/../$machine-w64-mingw32 -rtlib=compiler-rt -stdlib=libc++ -fuse-ld=lld $WRAPPER_FLAGS -fuse-cxa-atexit -Qunused-arguments"
+
+  cat <<EOF >$machine-w64-mingw32-clang
+#!/bin/sh
+DIR="\$(cd "\$(dirname "\$0")" && pwd)"
+\$DIR/clang -target $machine-w64-mingw32 $compiler_flags "\$@"
+EOF
+  chmod +x $machine-w64-mingw32-clang
+
+  cat <<EOF >$machine-w64-mingw32-clang++
+#!/bin/sh
+DIR="\$(cd "\$(dirname "\$0")" && pwd)"
+\$DIR/clang -target $machine-w64-mingw32 --driver-mode=g++ $compiler_flags "\$@"
+EOF
+  chmod +x $machine-w64-mingw32-clang++
+
+  CC="$machine-w64-mingw32-clang"
+  CXX="$machine-w64-mingw32-clang++"
+
+  popd
+}
+
+build_mingw() {
+  mkdir mingw-w64-headers
+  pushd mingw-w64-headers
+  $MOZ_FETCHES_DIR/mingw-w64/mingw-w64-headers/configure \
+    --host=$machine-w64-mingw32 \
+    --enable-sdk=all \
+    --enable-idl \
+    --with-default-msvcrt=ucrt \
+    --with-default-win32-winnt=$default_win32_winnt \
+    --prefix=$CROSS_PREFIX_DIR
+  make $make_flags install
+  popd
+
+  mkdir mingw-w64-crt
+  pushd mingw-w64-crt
+  $MOZ_FETCHES_DIR/mingw-w64/mingw-w64-crt/configure \
+    --host=$machine-w64-mingw32 \
+    $crt_flags \
+    --with-default-msvcrt=ucrt \
+    CC="$CC" \
+    AR=llvm-ar \
+    RANLIB=llvm-ranlib \
+    DLLTOOL=llvm-dlltool \
+    --prefix=$CROSS_PREFIX_DIR
+  make $make_flags
+  make $make_flags install
+  popd
+
+  mkdir widl
+  pushd widl
+  $MOZ_FETCHES_DIR/mingw-w64/mingw-w64-tools/widl/configure --target=$machine-w64-mingw32 --prefix=$INSTALL_DIR
+  make $make_flags
+  make $make_flags install
+  popd
+}
+
+build_compiler_rt() {
+  CLANG_VERSION=$(basename $(dirname $(dirname $(dirname $($CC --print-libgcc-file-name -rtlib=compiler-rt)))))
+  mkdir compiler-rt
+  pushd compiler-rt
+  cmake \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DCMAKE_C_COMPILER=$CC \
+      -DCMAKE_SYSTEM_NAME=Windows \
+      -DCMAKE_AR=$INSTALL_DIR/bin/llvm-ar \
+      -DCMAKE_RANLIB=$INSTALL_DIR/bin/llvm-ranlib \
+      -DCMAKE_C_COMPILER_WORKS=1 \
+      -DCMAKE_C_COMPILER_TARGET=$compiler_rt_machine-windows-gnu \
+      -DCOMPILER_RT_DEFAULT_TARGET_ONLY=TRUE \
+      $TOOLCHAIN_DIR/compiler-rt/lib/builtins
+  make $make_flags
+  mkdir -p $INSTALL_DIR/lib/clang/$CLANG_VERSION/lib/windows
+  cp lib/windows/libclang_rt.builtins-$compiler_rt_machine.a $INSTALL_DIR/lib/clang/$CLANG_VERSION/lib/windows/
+  popd
+}
+
+merge_libs() {
+  cat <<EOF |llvm-ar -M
+CREATE tmp.a
+ADDLIB $1
+ADDLIB $2
+SAVE
+END
+EOF
+  llvm-ranlib tmp.a
+  mv tmp.a $1
+}
+
+build_libcxx() {
+  # Below, we specify -g -gcodeview to build static libraries with debug information.
+  # Because we're not distributing these builds, this is fine. If one were to distribute
+  # the builds, perhaps one would want to make those flags conditional or investigation
+  # other options.
+  DEBUG_FLAGS="-g -gcodeview"
+
+  mkdir libunwind
+  pushd libunwind
+  cmake \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DCMAKE_INSTALL_PREFIX=$CROSS_PREFIX_DIR \
+      -DCMAKE_C_COMPILER=$CC \
+      -DCMAKE_CXX_COMPILER=$CXX \
+      -DCMAKE_CROSSCOMPILING=TRUE \
+      -DCMAKE_SYSROOT=$CROSS_PREFIX_DIR \
+      -DCMAKE_SYSTEM_NAME=Windows \
+      -DCMAKE_C_COMPILER_WORKS=TRUE \
+      -DCMAKE_CXX_COMPILER_WORKS=TRUE \
+      -DLLVM_COMPILER_CHECKED=TRUE \
+      -DCMAKE_AR=$INSTALL_DIR/bin/llvm-ar \
+      -DCMAKE_RANLIB=$INSTALL_DIR/bin/llvm-ranlib \
+      -DLLVM_NO_OLD_LIBSTDCXX=TRUE \
+      -DCXX_SUPPORTS_CXX11=TRUE \
+      -DCXX_SUPPORTS_CXX_STD=TRUE \
+      -DLIBUNWIND_USE_COMPILER_RT=TRUE \
+      -DLIBUNWIND_ENABLE_THREADS=TRUE \
+      -DLIBUNWIND_ENABLE_SHARED=FALSE \
+      -DLIBUNWIND_ENABLE_CROSS_UNWINDING=FALSE \
+      -DCMAKE_CXX_FLAGS="${DEBUG_FLAGS} -Wno-dll-attribute-on-redeclaration -nostdinc++ -I$TOOLCHAIN_DIR/libcxx/include -DPSAPI_VERSION=2" \
+      -DCMAKE_C_FLAGS="-Wno-dll-attribute-on-redeclaration" \
+      $MOZ_FETCHES_DIR/libunwind
+  make $make_flags
+  make $make_flags install
+  popd
+
+  mkdir libcxxabi
+  pushd libcxxabi
+  cmake \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DCMAKE_INSTALL_PREFIX=$CROSS_PREFIX_DIR \
+      -DCMAKE_C_COMPILER=$CC \
+      -DCMAKE_CXX_COMPILER=$CXX \
+      -DCMAKE_CROSSCOMPILING=TRUE \
+      -DCMAKE_SYSTEM_NAME=Windows \
+      -DCMAKE_C_COMPILER_WORKS=TRUE \
+      -DCMAKE_CXX_COMPILER_WORKS=TRUE \
+      -DCMAKE_SYSROOT=$CROSS_PREFIX_DIR \
+      -DLLVM_COMPILER_CHECKED=TRUE \
+      -DCMAKE_AR=$INSTALL_DIR/bin/llvm-ar \
+      -DCMAKE_RANLIB=$INSTALL_DIR/bin/llvm-ranlib \
+      -DLIBCXXABI_USE_COMPILER_RT=ON \
+      -DLIBCXXABI_ENABLE_EXCEPTIONS=ON \
+      -DLIBCXXABI_ENABLE_THREADS=ON \
+      -DLIBCXXABI_TARGET_TRIPLE=$machine-w64-mingw32 \
+      -DLIBCXXABI_ENABLE_SHARED=OFF \
+      -DLIBCXXABI_LIBCXX_INCLUDES=$TOOLCHAIN_DIR/libcxx/include \
+      -DLLVM_NO_OLD_LIBSTDCXX=TRUE \
+      -DCXX_SUPPORTS_CXX11=TRUE \
+      -DCXX_SUPPORTS_CXX_STD=TRUE \
+      -DCMAKE_CXX_FLAGS="${DEBUG_FLAGS} -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCPP_HAS_THREAD_API_WIN32" \
+      $TOOLCHAIN_DIR/libcxxabi
+  make $make_flags VERBOSE=1
+  popd
+
+  mkdir libcxx
+  pushd libcxx
+  cmake \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DCMAKE_INSTALL_PREFIX=$CROSS_PREFIX_DIR \
+      -DCMAKE_C_COMPILER=$CC \
+      -DCMAKE_CXX_COMPILER=$CXX \
+      -DCMAKE_CROSSCOMPILING=TRUE \
+      -DCMAKE_SYSTEM_NAME=Windows \
+      -DCMAKE_C_COMPILER_WORKS=TRUE \
+      -DCMAKE_CXX_COMPILER_WORKS=TRUE \
+      -DLLVM_COMPILER_CHECKED=TRUE \
+      -DCMAKE_AR=$INSTALL_DIR/bin/llvm-ar \
+      -DCMAKE_RANLIB=$INSTALL_DIR/bin/llvm-ranlib \
+      -DLIBCXX_USE_COMPILER_RT=ON \
+      -DLIBCXX_INSTALL_HEADERS=ON \
+      -DLIBCXX_ENABLE_EXCEPTIONS=ON \
+      -DLIBCXX_ENABLE_THREADS=ON \
+      -DLIBCXX_HAS_WIN32_THREAD_API=ON \
+      -DLIBCXX_ENABLE_MONOTONIC_CLOCK=ON \
+      -DLIBCXX_ENABLE_SHARED=OFF \
+      -DLIBCXX_SUPPORTS_STD_EQ_CXX11_FLAG=TRUE \
+      -DLIBCXX_HAVE_CXX_ATOMICS_WITHOUT_LIB=TRUE \
+      -DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
+      -DLIBCXX_ENABLE_FILESYSTEM=OFF \
+      -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=TRUE \
+      -DLIBCXX_CXX_ABI=libcxxabi \
+      -DLIBCXX_CXX_ABI_INCLUDE_PATHS=$TOOLCHAIN_DIR/libcxxabi/include \
+      -DLIBCXX_CXX_ABI_LIBRARY_PATH=../libcxxabi/lib \
+      -DCMAKE_CXX_FLAGS="${DEBUG_FLAGS} -D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS" \
+      $TOOLCHAIN_DIR/libcxx
+  make $make_flags VERBOSE=1
+  make $make_flags install
+
+  # libc++.a depends on libunwind.a. Whild linker will automatically link
+  # to libc++.a in C++ mode, it won't pick libunwind.a, requiring caller
+  # to explicitly pass -lunwind. Wo work around that, we merge libunwind.a
+  # into libc++.a.
+  merge_libs $CROSS_PREFIX_DIR/lib/libc++.a $CROSS_PREFIX_DIR/lib/libunwind.a
+  popd
+}
+
+build_libssp() {
+  pushd $MOZ_FETCHES_DIR/gcc-source/
+
+  # Massage the environment for the build-libssp.sh script
+  mkdir -p ./$machine-w64-mingw32/lib
+  cp $MOZ_FETCHES_DIR/llvm-mingw/libssp-Makefile .
+  sed -i 's/set -e/set -x -e -v/' $MOZ_FETCHES_DIR/llvm-mingw/build-libssp.sh
+  sed -i 's/(CROSS)gcc/(CROSS)clang/' libssp-Makefile
+  sed -i 's/\$(CROSS)ar/llvm-ar/' libssp-Makefile
+  OLDPATH=$PATH
+  PATH=$INSTALL_DIR/clang/bin:$PATH
+
+  # Run the script
+  TOOLCHAIN_ARCHS=$machine $MOZ_FETCHES_DIR/llvm-mingw/build-libssp.sh .
+
+  # Grab the artifacts, cleanup
+  cp $MOZ_FETCHES_DIR/gcc-source/$machine-w64-mingw32/lib/{libssp.a,libssp_nonshared.a} $INSTALL_DIR/$machine-w64-mingw32/lib/
+  unset TOOLCHAIN_ARCHS
+  PATH=$OLDPATH
+  popd
+}
+
+build_utils() {
+  pushd $INSTALL_DIR/bin/
+  ln -s llvm-nm $machine-w64-mingw32-nm
+  ln -s llvm-strip $machine-w64-mingw32-strip
+  ln -s llvm-readobj $machine-w64-mingw32-readobj
+  ln -s llvm-objcopy $machine-w64-mingw32-objcopy
+  ./clang $MOZ_FETCHES_DIR/llvm-mingw/wrappers/windres-wrapper.c -O2 -Wl,-s -o $machine-w64-mingw32-windres
+  popd
+}
+
+export PATH=$INSTALL_DIR/bin:$PATH
+
+prepare
+
+# gets a bit too verbose here
+set +x
+
+cd $TOOLCHAIN_DIR
+python3 $GECKO_PATH/build/build-clang/build-clang.py -c $GECKO_PATH/$2 --skip-tar
+
+set -x
+
+pushd $TOOLCHAIN_DIR/build
+
+install_wrappers
+build_mingw
+build_compiler_rt
+build_libcxx
+build_libssp
+build_utils
+
+popd
+
+# Put a tarball in the artifacts dir
+mkdir -p $UPLOAD_DIR
+
+pushd $(dirname $INSTALL_DIR)
+tar c clang | $GECKO_PATH/taskcluster/scripts/misc/zstdpy > clangmingw.tar.zst
+mv clangmingw.tar.zst $UPLOAD_DIR
+popd