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build-tblgen.sh
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#!/usr/bin/env bash
#
# Build the Linux/Mac llvm-tblgen tool. Note that this will be run during the
# Linux/Mac coredistools build. So, we only build the versions that we'll use
# during those builds. Thus, we need a linux-x64 version (used for
# linux-x64, linux-arm, linux-arm64 builds) and osx-x64 version (used for
# osx-x64 and osx-arm64 builds).
set -x
TargetOSArchitecture=$1
CrossRootfsDirectory=$2
# Set this to 1 to build using Azure Linux
BuildUsingAzureLinux=1
CMakeOSXArchitectures=
LLVMTargetsToBuild="AArch64;ARM;X86;LoongArch;RISCV"
case "$TargetOSArchitecture" in
linux-x64)
LLVMHostTriple=x86_64-linux-gnu
;;
linux-loongarch64)
LLVMHostTriple=loongarch64-linux-gnu
LLVMTargetsToBuild="LoongArch"
;;
osx-x64)
CMakeOSXArchitectures=x86_64
LLVMHostTriple=x86_64-apple-darwin
BuildUsingAzureLinux=0
;;
*)
echo "Unknown target OS and architecture: $TargetOSArchitecture"
exit 1
esac
RootDirectory="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
SourcesDirectory=$RootDirectory/src
BinariesDirectory=$RootDirectory/obj
StagingDirectory=$RootDirectory/bin
command -v cmake >/dev/null 2>&1
if [ "$?" -ne 0 ]; then
echo "ERROR: cmake is not found in the PATH"
exit 1
fi
if [ ! -d $BinariesDirectory ]; then
mkdir -p $BinariesDirectory
fi
pushd "$BinariesDirectory"
# Take first match from: clang clang-20 clang-19 .. clang-15
C_COMPILER=$(command -v clang{,-{20..15}} | head -n 1)
CXX_COMPILER=$(command -v clang++{,-{20..15}} | head -n 1)
echo "============== Configuring build"
if [ $BuildUsingAzureLinux -eq 1 ]; then
C_BUILD_FLAGS=""
CXX_BUILD_FLAGS=""
# Azure Linux doesn't have `ld` so need to tell clang to use `lld` with "-fuse-ld=lld"
cmake \
-G "Unix Makefiles" \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_ASM_COMPILER=$C_COMPILER \
-DCMAKE_C_COMPILER=$C_COMPILER \
-DCMAKE_CXX_COMPILER=$CXX_COMPILER \
-DCMAKE_ASM_COMPILER_TARGET="$LLVMHostTriple" \
-DCMAKE_C_COMPILER_TARGET="$LLVMHostTriple" \
-DCMAKE_CXX_COMPILER_TARGET="$LLVMHostTriple" \
-DCMAKE_C_FLAGS="${C_BUILD_FLAGS}" \
-DCMAKE_CXX_FLAGS="${CXX_BUILD_FLAGS}" \
-DCMAKE_INSTALL_PREFIX=$RootDirectory \
-DCMAKE_POSITION_INDEPENDENT_CODE=ON \
-DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" \
-DCMAKE_SHARED_LINKER_FLAGS="-fuse-ld=lld" \
-DLLVM_USE_LINKER=lld \
-DLLVM_ENABLE_RUNTIMES="libcxx" \
-DLIBCXX_ENABLE_SHARED=OFF \
-DLIBCXX_CXX_ABI=libstdc++ \
-DLIBCXX_CXX_ABI_INCLUDE_PATHS="$CPP_INCLUDES;$TRIPLET_INCLUDES" \
-DLLVM_TARGETS_TO_BUILD=$LLVMTargetsToBuild \
$SourcesDirectory/llvm-project/llvm
elif [ -z "$CrossRootfsDirectory" ]; then
BUILD_FLAGS=""
cmake \
-G "Unix Makefiles" \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_SYSTEM_NAME=$CMakeSystemName \
-DCMAKE_C_COMPILER=$C_COMPILER \
-DCMAKE_CXX_COMPILER=$CXX_COMPILER \
-DCMAKE_C_FLAGS="${BUILD_FLAGS}" \
-DCMAKE_CXX_FLAGS="${BUILD_FLAGS}" \
-DCMAKE_INSTALL_PREFIX=$RootDirectory \
-DCMAKE_OSX_ARCHITECTURES=$CMakeOSXArchitectures \
-DLLVM_TARGETS_TO_BUILD=$LLVMTargetsToBuild \
$SourcesDirectory/llvm-project/llvm
else
BUILD_FLAGS="--sysroot=$CrossRootfsDirectory"
cmake \
-G "Unix Makefiles" \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=$RootDirectory \
-DCMAKE_SYSTEM_NAME=$CMakeSystemName \
-DCMAKE_C_COMPILER=$C_COMPILER \
-DCMAKE_CXX_COMPILER=$CXX_COMPILER \
-DCMAKE_C_FLAGS="${BUILD_FLAGS}" \
-DCMAKE_CXX_FLAGS="${BUILD_FLAGS}" \
-DCMAKE_INCLUDE_PATH=$CrossRootfsDirectory/usr/include \
-DCMAKE_LIBRARY_PATH=$CrossRootfsDirectory/usr/lib/$LLVMHostTriple \
-DLLVM_TARGETS_TO_BUILD=$LLVMTargetsToBuild \
$SourcesDirectory/llvm-project/llvm
fi
popd
if [ "$?" -ne 0 ]; then
echo "ERROR: cmake exited with code $?"
exit 1
fi
echo "============== Building llvm-tblgen"
cmake \
--build $BinariesDirectory \
--parallel 4 \
--target llvm-tblgen \
--config Release
if [ "$?" -ne 0 ]; then
echo "ERROR: cmake exited with code $?"
exit 1
fi
if [ ! -d $StagingDirectory ]; then
mkdir -p $StagingDirectory
fi
# Copy llvm-tblgen from BinariesDirectory to StagingDirectory
find $BinariesDirectory -name llvm-tblgen -type f -exec cp -v {} $StagingDirectory \;
exit 0