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#!/bin/bash
[% c("var/set_default_env") -%]
builddir=/var/tmp/build
distdir=/var/tmp/dist/mingw-w64-clang
mkdir -p $distdir
cd /var/tmp/dist
tar -xf $rootdir/[% c('input_files_by_name/clang') %]
mv clang/* mingw-w64-clang/
tar -xf $rootdir/[% c('input_files_by_name/cmake') %]
mkdir -p $builddir
cd $builddir
tar -xf $rootdir/mingw-w64-clang-[% c('version') %].tar.gz
mv mingw-w64-clang-[% c('version') %] mingw-w64-clang
tar -xf $rootdir/[% c('input_files_by_name/libcxx') %]
mv libcxx-* libcxx
tar -xf $rootdir/[% c('input_files_by_name/libcxxabi') %]
mv libcxxabi-* libcxxabi
tar -xf $rootdir/[% c('input_files_by_name/libunwind') %]
mv libunwind-* libunwind
tar -xf $rootdir/[% c('input_files_by_name/compiler-rt') %]
mv compiler-rt-* compiler-rt
tar -xf $rootdir/[% c('input_files_by_name/llvm-mingw') %]

# Adding the wrappers and symlinks we need
cd $distdir/bin
exception_flags=""
[% IF c("var/windows-i686") %]
  exception_flags="-fsjlj-exceptions"
[% END -%]
compiler_flags="--sysroot \$DIR/../[% c("arch") %]-w64-mingw32 -rtlib=compiler-rt -stdlib=libc++ -fuse-ld=lld $exception_flags -fuse-cxa-atexit -Qunused-arguments"

cat <<EOF >[% c("arch") %]-w64-mingw32-clang
#!/bin/sh
DIR="\$(cd "\$(dirname "\$0")" && pwd)"
\$DIR/clang -target [% c("arch") %]-w64-mingw32 $compiler_flags "\$@"
EOF
chmod +x [% c("arch") %]-w64-mingw32-clang

cat <<EOF >[% c("arch") %]-w64-mingw32-clang++
#!/bin/sh
DIR="\$(cd "\$(dirname "\$0")" && pwd)"
\$DIR/clang -target [% c("arch") %]-w64-mingw32 --driver-mode=g++ $compiler_flags "\$@"
EOF
chmod +x [% c("arch") %]-w64-mingw32-clang++

ln -s llvm-nm [% c("arch") %]-w64-mingw32-nm
ln -s llvm-strip [% c("arch") %]-w64-mingw32-strip
ln -s llvm-readobj [% c("arch") %]-w64-mingw32-readobj
ln -s llvm-objcopy [% c("arch") %]-w64-mingw32-objcopy
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./clang $builddir/llvm-mingw/wrappers/windres-wrapper.c -O2 -Wl,-s -o [% c("arch") %]-w64-mingw32-windres
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# Building mingw-w64
export PATH="$distdir/bin:/var/tmp/dist/cmake/bin:$PATH"
CC="[% c("arch") %]-w64-mingw32-clang"
CXX="[% c("arch") %]-w64-mingw32-clang++"
# This is the 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
[% IF c("var/windows-i686") %]
  crt_flags="--enable-lib32 --disable-lib64"
  compiler_rt_machine="i386"
[% ELSE -%]
  crt_flags="--disable-lib32 --enable-lib64"
  compiler_rt_machine="x86_64"
[% END -%]

cd $builddir/mingw-w64-clang
patch -p1 < $rootdir/mingw-winrt.patch
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cd mingw-w64-headers
mkdir build && cd build
../configure --host=[% c("arch") %]-w64-mingw32 \
             --enable-sdk=all \
             --enable-secure-api \
             --enable-idl \
             --with-default-msvcrt=ucrt \
             --with-default-win32-winnt=$default_win32_winnt \
             --prefix=$distdir/[% c("arch") %]-w64-mingw32
make -j[% c("buildconf/num_procs") %] install

cd $builddir/mingw-w64-clang/mingw-w64-crt
mkdir build && cd build
../configure --host=[% c("arch") %]-w64-mingw32 \
             $crt_flags \
             --with-default-msvcrt=ucrt \
             CC="$CC" \
             AR=llvm-ar \
             RANLIB=llvm-ranlib \
             DLLTOOL=llvm-dlltool \
             --prefix=$distdir/[% c("arch") %]-w64-mingw32
make -j[% c("buildconf/num_procs") %]
make -j[% c("buildconf/num_procs") %] install

cd $builddir/mingw-w64-clang/mingw-w64-tools/widl
mkdir build && cd build
../configure --target=[% c("arch") %]-w64-mingw32 --prefix=$distdir
make -j[% c("buildconf/num_procs") %]
make -j[% c("buildconf/num_procs") %] install

# compiler-rt
cd $builddir/compiler-rt
mkdir build && cd build
CLANG_VERSION=$(basename $(dirname $(dirname $(dirname $($CC --print-libgcc-file-name -rtlib=compiler-rt)))))
cmake -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_C_COMPILER=$CC \
      -DCMAKE_SYSTEM_NAME=Windows \
      -DCMAKE_AR=$distdir/bin/llvm-ar \
      -DCMAKE_RANLIB=$distdir/bin/llvm-ranlib \
      -DCMAKE_C_COMPILER_WORKS=1 \
      -DCMAKE_C_COMPILER_TARGET=$compiler_rt_machine-windows-gnu \
      -DCOMPILER_RT_DEFAULT_TARGET_ONLY=TRUE \
      $builddir/compiler-rt/lib/builtins
  make -j[% c("buildconf/num_procs") %]
  mkdir -p $distdir/lib/clang/$CLANG_VERSION/lib/windows
  cp lib/windows/libclang_rt.builtins-$compiler_rt_machine.a $distdir/lib/clang/$CLANG_VERSION/lib/windows/

# libunwind
cd $builddir/libunwind
mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_INSTALL_PREFIX=$distdir/[% c("arch") %]-w64-mingw32 \
      -DCMAKE_C_COMPILER=$CC \
      -DCMAKE_CXX_COMPILER=$CXX \
      -DCMAKE_CROSSCOMPILING=TRUE \
      -DCMAKE_SYSROOT=$distdir/[% c("arch") %]-w64-mingw32 \
      -DCMAKE_SYSTEM_NAME=Windows \
      -DCMAKE_C_COMPILER_WORKS=TRUE \
      -DCMAKE_CXX_COMPILER_WORKS=TRUE \
      -DLLVM_COMPILER_CHECKED=True \
      -DCMAKE_AR=$distdir/bin/llvm-ar \
      -DCMAKE_RANLIB=$distdir/bin/llvm-ranlib \
      -DLLVM_NO_OLD_LIBSTDCXX=TRUE \
      -DCXX_SUPPORTS_CXX11=TRUE \
      -DCXX_SUPPORTS_CXX_STD=True \
      -DLIBUNWIND_USE_COMPILER_RT=TRUE \
      -DLIBUNWIND_ENABLE_THREADS=TRUE \
      -DLIBUNWIND_ENABLE_SHARED=FALSE \
      -DLIBUNWIND_ENABLE_CROSS_UNWINDING=FALSE \
      -DCMAKE_CXX_FLAGS="-Wno-dll-attribute-on-redeclaration -nostdinc++ -I$builddir/libcxx/include -DPSAPI_VERSION=2" \
      -DCMAKE_C_FLAGS="-Wno-dll-attribute-on-redeclaration" \
      $builddir/libunwind
make -j[% c("buildconf/num_procs") %]
make -j[% c("buildconf/num_procs") %] install

# libcxxabi
cd $builddir/libcxxabi
mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_INSTALL_PREFIX=$distdir/[% c("arch") %]-w64-mingw32 \
      -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=$distdir/[% c("arch") %]-w64-mingw32 \
      -DLLVM_COMPILER_CHECKED=True \
      -DCMAKE_AR=$distdir/bin/llvm-ar \
      -DCMAKE_RANLIB=$distdir/bin/llvm-ranlib \
      -DLIBCXXABI_USE_COMPILER_RT=ON \
      -DLIBCXXABI_ENABLE_EXCEPTIONS=ON \
      -DLIBCXXABI_ENABLE_THREADS=ON \
      -DLIBCXXABI_TARGET_TRIPLE=[% c("arch") %]-w64-mingw32 \
      -DLIBCXXABI_ENABLE_SHARED=OFF \
      -DLIBCXXABI_LIBCXX_INCLUDES=$builddir/libcxx/include \
      -DLLVM_NO_OLD_LIBSTDCXX=TRUE \
      -DCXX_SUPPORTS_CXX11=TRUE \
      -DCXX_SUPPORTS_CXX_STD=True \
      -DCMAKE_CXX_FLAGS="-D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS -D_LIBCPP_HAS_THREAD_API_WIN32" \
      $builddir/libcxxabi
make -j[% c("buildconf/num_procs") %] VERBOSE=1

# libcxx
cd $builddir/libcxx
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patch -p1 < $rootdir/sort.patch
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mkdir build && cd build
cmake -DCMAKE_BUILD_TYPE=Release \
      -DCMAKE_INSTALL_PREFIX=$distdir/[% c("arch") %]-w64-mingw32 \
      -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=$distdir/bin/llvm-ar \
      -DCMAKE_RANLIB=$distdir/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=$builddir/libcxxabi/include \
      -DLIBCXX_CXX_ABI_LIBRARY_PATH=$builddir/libcxxabi/build/lib \
      -DCMAKE_CXX_FLAGS="-D_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS" \
      $builddir/libcxx
make -j[% c("buildconf/num_procs") %] VERBOSE=1
make -j[% c("buildconf/num_procs") %] install

# libc++.a depends on libunwind.a. While the linker will automatically link to
# libc++.a in C++ mode, it won't pick libunwind.a, requiring the caller to
# explicitly pass -lunwind. To work around that, we merge libunwind.a into
# libc++.a.
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
}

merge_libs $distdir/[% c("arch") %]-w64-mingw32/lib/libc++.a $distdir/[% c("arch") %]-w64-mingw32/lib/libunwind.a

# Packaging up everything
cd $distdir
cd ..
[% c('tar', {
        tar_src => [ project ],
        tar_args => '-czf ' _ dest_dir _ '/' _ c('filename'),
    }) %]