137 lines
4.7 KiB
Bash
137 lines
4.7 KiB
Bash
#!/bin/sh
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#
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# This file detects the C/C++ compiler and exports it to the CC/CXX environment variables
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#
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# NOTE: some scripts source this file and rely on stdout being empty, make sure to not output anything here!
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if [ -z "$build_arch" ] || [ -z "$compiler" ]; then
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echo "Usage..."
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echo "build_arch=<ARCH> compiler=<NAME> init-compiler.sh"
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echo "Specify the target architecture."
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echo "Specify the name of compiler (clang or gcc)."
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exit 1
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fi
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case "$compiler" in
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clang*|-clang*|--clang*)
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# clangx.y or clang-x.y
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version="$(echo "$compiler" | tr -d '[:alpha:]-=')"
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majorVersion="${version%%.*}"
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[ -z "${version##*.*}" ] && minorVersion="${version#*.}"
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if [ -z "$minorVersion" ] && [ -n "$majorVersion" ] && [ "$majorVersion" -le 6 ]; then
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minorVersion=0;
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fi
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compiler=clang
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;;
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gcc*|-gcc*|--gcc*)
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# gccx.y or gcc-x.y
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version="$(echo "$compiler" | tr -d '[:alpha:]-=')"
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majorVersion="${version%%.*}"
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[ -z "${version##*.*}" ] && minorVersion="${version#*.}"
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compiler=gcc
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;;
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esac
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cxxCompiler="$compiler++"
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# clear the existing CC and CXX from environment
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CC=
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CXX=
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LDFLAGS=
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if [ "$compiler" = "gcc" ]; then cxxCompiler="g++"; fi
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check_version_exists() {
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desired_version=-1
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# Set up the environment to be used for building with the desired compiler.
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if command -v "$compiler-$1.$2" > /dev/null; then
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desired_version="-$1.$2"
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elif command -v "$compiler$1$2" > /dev/null; then
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desired_version="$1$2"
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elif command -v "$compiler-$1$2" > /dev/null; then
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desired_version="-$1$2"
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fi
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echo "$desired_version"
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}
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if [ -z "$CLR_CC" ]; then
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# Set default versions
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if [ -z "$majorVersion" ]; then
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# note: gcc (all versions) and clang versions higher than 6 do not have minor version in file name, if it is zero.
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if [ "$compiler" = "clang" ]; then versions="16 15 14 13 12 11 10 9 8 7 6.0 5.0 4.0 3.9 3.8 3.7 3.6 3.5"
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elif [ "$compiler" = "gcc" ]; then versions="13 12 11 10 9 8 7 6 5 4.9"; fi
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for version in $versions; do
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_major="${version%%.*}"
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[ -z "${version##*.*}" ] && _minor="${version#*.}"
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desired_version="$(check_version_exists "$_major" "$_minor")"
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if [ "$desired_version" != "-1" ]; then majorVersion="$_major"; break; fi
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done
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if [ -z "$majorVersion" ]; then
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if command -v "$compiler" > /dev/null; then
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if [ "$(uname)" != "Darwin" ]; then
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echo "Warning: Specific version of $compiler not found, falling back to use the one in PATH."
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fi
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CC="$(command -v "$compiler")"
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CXX="$(command -v "$cxxCompiler")"
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else
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echo "No usable version of $compiler found."
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exit 1
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fi
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else
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if [ "$compiler" = "clang" ] && [ "$majorVersion" -lt 5 ]; then
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if [ "$build_arch" = "arm" ] || [ "$build_arch" = "armel" ]; then
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if command -v "$compiler" > /dev/null; then
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echo "Warning: Found clang version $majorVersion which is not supported on arm/armel architectures, falling back to use clang from PATH."
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CC="$(command -v "$compiler")"
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CXX="$(command -v "$cxxCompiler")"
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else
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echo "Found clang version $majorVersion which is not supported on arm/armel architectures, and there is no clang in PATH."
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exit 1
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fi
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fi
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fi
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fi
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else
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desired_version="$(check_version_exists "$majorVersion" "$minorVersion")"
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if [ "$desired_version" = "-1" ]; then
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echo "Could not find specific version of $compiler: $majorVersion $minorVersion."
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exit 1
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fi
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fi
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if [ -z "$CC" ]; then
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CC="$(command -v "$compiler$desired_version")"
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CXX="$(command -v "$cxxCompiler$desired_version")"
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if [ -z "$CXX" ]; then CXX="$(command -v "$cxxCompiler")"; fi
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fi
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else
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if [ ! -f "$CLR_CC" ]; then
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echo "CLR_CC is set but path '$CLR_CC' does not exist"
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exit 1
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fi
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CC="$CLR_CC"
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CXX="$CLR_CXX"
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fi
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if [ -z "$CC" ]; then
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echo "Unable to find $compiler."
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exit 1
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fi
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# Only lld version >= 9 can be considered stable. lld doesn't support s390x.
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if [ "$compiler" = "clang" ] && [ -n "$majorVersion" ] && [ "$majorVersion" -ge 9 ] && [ "$build_arch" != "s390x" ]; then
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if "$CC" -fuse-ld=lld -Wl,--version >/dev/null 2>&1; then
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LDFLAGS="-fuse-ld=lld"
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fi
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fi
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SCAN_BUILD_COMMAND="$(command -v "scan-build$desired_version")"
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export CC CXX LDFLAGS SCAN_BUILD_COMMAND
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