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build_clang.sh
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build_clang.sh
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#!/usr/bin/env bash
#
# Build and install Clang/LLVM, using `gcc`.
#
# You only need to run this if your distribution does not provide
# clang - or if you want to build your own version from a recent
# source tree.
#
pushd "${0%/*}" &>/dev/null
DESC=clang
USESYSTEMCOMPILER=1
source tools/tools.sh
mkdir -p $BUILD_DIR
source $BASE_DIR/tools/trap_exit.sh
if [ -z "$CLANG_VERSION" ]; then
CLANG_VERSION=18.1.8
fi
if [ -z "$INSTALLPREFIX" ]; then
INSTALLPREFIX="/usr/local"
fi
# acceptable values are llvm or apple
if [ -z "$GITPROJECT" ]; then
GITPROJECT="llvm"
fi
require cmake
require curl
CLANG_LLVM_PKG=""
function set_package_link()
{
pushd $TARBALL_DIR &>/dev/null
# Official LLVM project download URLs look like:
# https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-10.0.1.zip
# Apple LLVM project download URLs look like:
# https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20200108.zip
# where the branch-to-major-version lookup is the below:
# apple/stable/20210107 = 12
# apple/stable/20200714 = 11
# apple/stable/20200108 = 10
# apple/stable/20190619 = 9
# apple/stable/20190104 = 8
# apple/stable/20180801 = 7
if [ $GITPROJECT == "llvm" ]; then
# with official LLVM we just pass the version straight into the URL
CLANG_LLVM_PKG="https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-$CLANG_VERSION.zip"
elif [ $GITPROJECT == "apple" ]; then
# with Apple LLVM we only get each major version as a stable branch so we just compare the input major version
CLANG_VERSION_PARTS=(${CLANG_VERSION//./ })
case ${CLANG_VERSION_PARTS[0]} in
17) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/stable/20230725.zip" ;;
16) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/stable/20221013.zip" ;;
15) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/stable/20220421.zip" ;;
14) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/stable/20211026.zip" ;;
13) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/stable/20210726.zip" ;;
12) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20210107.zip" ;;
11) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20200714.zip" ;;
10) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20200108.zip" ;;
9) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20190619.zip" ;;
8) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20190104.zip" ;;
7) CLANG_LLVM_PKG="https://github.com/apple/llvm-project/archive/refs/heads/apple/stable/20180801.zip" ;;
*)
echo "Unknown Apple Clang version $CLANG_VERSION!" 1>&2
exit 1
;;
esac
fi
# after we generate the URL string above we need to actually check it works
if [ ! -f $(basename $CLANG_LLVM_PKG) ] && [ $(curl --head -L $CLANG_LLVM_PKG -o /dev/stderr -w "%{http_code}" 2> /dev/null) -ne 200 ]; then
echo "Release $CLANG_VERSION not found in $GITPROJECT repo!" 1>&2
exit 1
fi
popd &>/dev/null #$TARBALL_DIR
}
set_package_link
if [ -z "$CLANG_LLVM_PKG" ]; then
echo "Release $CLANG_VERSION not found!" 1>&2
exit 1
fi
echo "Building Clang/LLVM $GITPROJECT-$CLANG_VERSION (this may take a long time)."
echo "Installation Prefix: $INSTALLPREFIX [INSTALLPREFIX=<Prefix>]"
echo ""
if [ -z "$UNATTENDED" ]; then
if prompt "Perform two stage build? (recommended)"; then
echo "Enabling two stage build ..."
ENABLE_BOOTSTRAP=1
else
echo "Disabling two stage build ..."
fi
echo ""
read -p "Press enter to start building."
echo ""
else
ENABLE_BOOTSTRAP=1
fi
# download the GitHub repo as a ZIP file - but only if it doesn't exist already
pushd $TARBALL_DIR &>/dev/null
if [ ! -f $(basename $CLANG_LLVM_PKG) ]; then
download $CLANG_LLVM_PKG
fi
popd &>/dev/null #$TARBALL_DIR
# extract ZIP
pushd $BUILD_DIR &>/dev/null
rm -rf "clang-$CLANG_VERSION"
mkdir "clang-$CLANG_VERSION"
pushd "clang-$CLANG_VERSION" &>/dev/null
echo "extracting ..."
extract $TARBALL_DIR/$(basename $CLANG_LLVM_PKG)
# Various Buildfixes
if ([[ $CLANG_VERSION == 15* ]] || [[ $CLANG_VERSION == 14* ]] ||
[[ $CLANG_VERSION == 13* ]] || [[ $CLANG_VERSION == 12* ]] ||
[[ $CLANG_VERSION == 11* ]] || [[ $CLANG_VERSION == 10* ]]); then
$SED -i 's/#include <string>/#include <string>\
\ #include <cstdint>/' *llvm*/llvm/include/llvm/Support/Signals.h
fi
if ([[ $CLANG_VERSION == 11* ]] || [[ $CLANG_VERSION == 10* ]] ||
[[ $CLANG_VERSION == 9* ]] || [[ $CLANG_VERSION == 8* ]]); then
$SED -i 's/#include <vector>/#include <vector>\
\ #include <limits>/' *llvm*/llvm/utils/benchmark/src/benchmark_register.h
fi
if ([[ $CLANG_VERSION == 9* ]] || [[ $CLANG_VERSION == 8* ]]); then
$SED -i 's/#include <array>/#include <array>\
\ #include <cstdint>\
\ #include <string>/' *llvm*/llvm/include/llvm/Demangle/MicrosoftDemangleNodes.h
fi
function build()
{
stage=$1
mkdir -p $stage
pushd $stage &>/dev/null
cmake ../*llvm*/llvm \
-DCMAKE_INSTALL_PREFIX=$INSTALLPREFIX \
-DCMAKE_BUILD_TYPE=Release \
-DLLVM_ENABLE_ASSERTIONS=OFF \
-DLLVM_ENABLE_PROJECTS="clang" \
-DLLVM_TARGETS_TO_BUILD="X86;AArch64;ARM" \
-DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=1
$MAKE $2 -j $JOBS
popd &>/dev/null
}
export CFLAGS=""
export CXXFLAGS=""
if [ -z "$PORTABLE" ]; then
export CFLAGS+=" -march=native"
export CXXFLAGS+=" -march=native"
fi
# Silence warnings to get a cleaner build state output
if [ -z "$ENABLE_COMPILER_WARNINGS" ]; then
export CFLAGS+=" -w"
export CXXFLAGS+=" -w"
fi
if [ -z "$ENABLE_BOOTSTRAP" ]; then
build build
else
build build_stage1 clang
export CC=$PWD/build_stage1/bin/clang
export CXX=$PWD/build_stage1/bin/clang++
build build_stage2
if [ -n "$ENABLE_FULL_BOOTSTRAP" ]; then
CC=$PWD/build_stage2/bin/clang \
CXX=$PWD/build_stage2/bin/clang++ \
build build_stage3
fi
fi
# install, but only if it is globally enabled
if [ -z "$ENABLE_CLANG_INSTALL" ]; then
echo ""
echo "Done!"
echo ""
echo -n "cd into '$BUILD_DIR/clang-$CLANG_VERSION/$stage' and type 'make install' to install "
echo "clang/llvm to '$INSTALLPREFIX'"
echo ""
else
$MAKE -C "$BUILD_DIR/clang-$CLANG_VERSION/$stage" install -j $JOBS VERBOSE=1
echo ""
echo "Done!"
echo ""
fi