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+#!/usr/bin/env bash
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+#
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+# This file locates the native compiler with the given name and version and sets the environment variables to locate it.
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+#
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+
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+source="${BASH_SOURCE[0]}"
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+
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+# resolve $SOURCE until the file is no longer a symlink
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+while [[ -h $source ]]; do
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+ scriptroot="$( cd -P "$( dirname "$source" )" && pwd )"
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+ source="$(readlink "$source")"
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+
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+ # if $source was a relative symlink, we need to resolve it relative to the path where the
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+ # symlink file was located
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+ [[ $source != /* ]] && source="$scriptroot/$source"
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+done
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+scriptroot="$( cd -P "$( dirname "$source" )" && pwd )"
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+
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+if [ $# -lt 0 ]
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+then
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+ echo "Usage..."
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+ echo "find-native-compiler.sh <compiler> <compiler major version> <compiler minor version>"
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+ echo "Specify the name of compiler (clang or gcc)."
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+ echo "Specify the major version of compiler."
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+ echo "Specify the minor version of compiler."
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+ exit 1
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+fi
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+
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+. $scriptroot/../pipeline-logging-functions.sh
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+
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+compiler="$1"
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+cxxCompiler="$compiler++"
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+majorVersion="$2"
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+minorVersion="$3"
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+
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+if [ "$compiler" = "gcc" ]; then cxxCompiler="g++"; fi
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+
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+check_version_exists() {
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+ desired_version=-1
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+
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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$2"
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+ fi
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+
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+ echo "$desired_version"
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+}
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+
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+if [ -z "$CLR_CC" ]; then
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+
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+ # Set default versions
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+ if [ -z "$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 [ "$compiler" = "clang" ]; then versions=( 9 8 7 6.0 5.0 4.0 3.9 3.8 3.7 3.6 3.5 )
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+ elif [ "$compiler" = "gcc" ]; then versions=( 9 8 7 6 5 4.9 ); fi
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+
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+ for version in "${versions[@]}"; do
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+ parts=(${version//./ })
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+ desired_version="$(check_version_exists "${parts[0]}" "${parts[1]}")"
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+ if [ "$desired_version" != "-1" ]; then majorVersion="${parts[0]}"; break; fi
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+ done
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+
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+ if [ -z "$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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+ Write-PipelineTelemetryError -category "Build" -type "warning" "Specific version of $compiler not found, falling back to use the one in PATH."
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+ fi
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+ export CC="$(command -v "$compiler")"
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+ export CXX="$(command -v "$cxxCompiler")"
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+ else
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+ Write-PipelineTelemetryError -category "Build" "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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+ Write-PipelineTelemetryError -category "Build" -type "warning" "Found clang version $majorVersion which is not supported on arm/armel architectures, falling back to use clang from PATH."
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+ export CC="$(command -v "$compiler")"
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+ export CXX="$(command -v "$cxxCompiler")"
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+ else
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+ Write-PipelineTelemetryError -category "Build" "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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+ Write-PipelineTelemetryError -category "Build" "Could not find specific version of $compiler: $majorVersion $minorVersion."
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+ exit 1
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+ fi
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+ fi
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+
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+ if [ -z "$CC" ]; then
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+ export CC="$(command -v "$compiler$desired_version")"
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+ export CXX="$(command -v "$cxxCompiler$desired_version")"
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+ if [ -z "$CXX" ]; then export CXX="$(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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+ Write-PipelineTelemetryError -category "Build" "CLR_CC is set but path '$CLR_CC' does not exist"
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+ exit 1
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+ fi
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+ export CC="$CLR_CC"
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+ export CXX="$CLR_CXX"
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+fi
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+
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+if [ -z "$CC" ]; then
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+ Write-PipelineTelemetryError -category "Build" "Unable to find $compiler."
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+ exit 1
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+fi
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+
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+export CCC_CC="$CC"
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+export CCC_CXX="$CXX"
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+export SCAN_BUILD_COMMAND="$(command -v "scan-build$desired_version")"
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dotnet-maestro[bot]