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#!/usr/bin/env bash
#
# This file detects the C/C++ compiler and exports it to the CC/CXX environment variables
#
if [[ "$#" -lt 2 ]]; then
echo "Usage..."
echo "init-compiler.sh <Architecture> <compiler> <compiler major version> <compiler minor version>"
echo "Specify the target architecture."
echo "Specify the name of compiler (clang or gcc)."
echo "Specify the major version of compiler."
echo "Specify the minor version of compiler."
exit 1
fi
. "$( cd -P "$( dirname "$0" )" && pwd )"/../pipeline-logging-functions.sh
build_arch="$1"
compiler="$2"
cxxCompiler="$compiler++"
majorVersion="$3"
minorVersion="$4"
# clear the existing CC and CXX from environment
CC=
CXX=
LDFLAGS=
if [[ "$compiler" == "gcc" ]]; then cxxCompiler="g++"; fi
check_version_exists() {
desired_version=-1
# Set up the environment to be used for building with the desired compiler.
if command -v "$compiler-$1.$2" > /dev/null; then
desired_version="-$1.$2"
elif command -v "$compiler$1$2" > /dev/null; then
desired_version="$1$2"
elif command -v "$compiler-$1$2" > /dev/null; then
desired_version="-$1$2"
fi
echo "$desired_version"
}
if [[ -z "$CLR_CC" ]]; then
# Set default versions
if [[ -z "$majorVersion" ]]; then
# note: gcc (all versions) and clang versions higher than 6 do not have minor version in file name, if it is zero.
if [[ "$compiler" == "clang" ]]; then versions=( 12 11 10 9 8 7 6.0 5.0 4.0 3.9 3.8 3.7 3.6 3.5 )
elif [[ "$compiler" == "gcc" ]]; then versions=( 11 10 9 8 7 6 5 4.9 ); fi
for version in "${versions[@]}"; do
parts=(${version//./ })
desired_version="$(check_version_exists "${parts[0]}" "${parts[1]}")"
if [[ "$desired_version" != "-1" ]]; then majorVersion="${parts[0]}"; break; fi
done
if [[ -z "$majorVersion" ]]; then
if command -v "$compiler" > /dev/null; then
if [[ "$(uname)" != "Darwin" ]]; then
Write-PipelineTelemetryError -category "Build" -type "warning" "Specific version of $compiler not found, falling back to use the one in PATH."
fi
CC="$(command -v "$compiler")"
CXX="$(command -v "$cxxCompiler")"
else
Write-PipelineTelemetryError -category "Build" "No usable version of $compiler found."
exit 1
fi
else
if [[ "$compiler" == "clang" && "$majorVersion" -lt 5 ]]; then
if [[ "$build_arch" == "arm" || "$build_arch" == "armel" ]]; then
if command -v "$compiler" > /dev/null; then
Write-PipelineTelemetryError -category "Build" -type "warning" "Found clang version $majorVersion which is not supported on arm/armel architectures, falling back to use clang from PATH."
CC="$(command -v "$compiler")"
CXX="$(command -v "$cxxCompiler")"
else
Write-PipelineTelemetryError -category "Build" "Found clang version $majorVersion which is not supported on arm/armel architectures, and there is no clang in PATH."
exit 1
fi
fi
fi
fi
else
desired_version="$(check_version_exists "$majorVersion" "$minorVersion")"
if [[ "$desired_version" == "-1" ]]; then
Write-PipelineTelemetryError -category "Build" "Could not find specific version of $compiler: $majorVersion $minorVersion."
exit 1
fi
fi
if [[ -z "$CC" ]]; then
CC="$(command -v "$compiler$desired_version")"
CXX="$(command -v "$cxxCompiler$desired_version")"
if [[ -z "$CXX" ]]; then CXX="$(command -v "$cxxCompiler")"; fi
fi
else
if [[ ! -f "$CLR_CC" ]]; then
Write-PipelineTelemetryError -category "Build" "CLR_CC is set but path '$CLR_CC' does not exist"
exit 1
fi
CC="$CLR_CC"
CXX="$CLR_CXX"
fi
if [[ -z "$CC" ]]; then
Write-PipelineTelemetryError -category "Build" "Unable to find $compiler."
exit 1
fi
if [[ "$compiler" == "clang" ]]; then
if command -v "lld$desired_version" > /dev/null; then
# Only lld version >= 9 can be considered stable
if [[ "$majorVersion" -ge 9 ]]; then
LDFLAGS="-fuse-ld=lld"
fi
fi
fi
SCAN_BUILD_COMMAND="$(command -v "scan-build$desired_version")"
export CC CXX LDFLAGS SCAN_BUILD_COMMAND
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