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@@ -2,7 +2,9 @@
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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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+# NOTE: some scripts source this file and rely on stdout being empty, make sure
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+# to not output *anything* here, unless it is an error message that fails the
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+# build.
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if [ -z "$build_arch" ] || [ -z "$compiler" ]; then
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echo "Usage..."
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@@ -58,6 +60,26 @@ check_version_exists() {
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echo "$desired_version"
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}
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+__baseOS="$(uname)"
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+set_compiler_version_from_CC() {
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+ if [ "$__baseOS" = "Darwin" ]; then
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+ # On Darwin, the versions from -version/-dumpversion refer to Xcode
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+ # versions, not llvm versions, so we can't rely on them.
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+ return
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+ fi
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+
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+ version="$("$CC" -dumpversion)"
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+ if [ -z "$version" ]; then
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+ echo "Error: $CC -dumpversion didn't provide a version"
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+ exit 1
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+ fi
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+
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+ # gcc and clang often display 3 part versions. However, gcc can show only 1 part in some environments.
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+ IFS=. read -r majorVersion minorVersion _ <<EOF
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+$version
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+EOF
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+}
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+
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if [ -z "$CLR_CC" ]; then
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# Set default versions
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@@ -74,64 +96,67 @@ if [ -z "$CLR_CC" ]; then
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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 $compiler found."
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+ if ! command -v "$compiler" > /dev/null; then
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+ echo "Error: No usable version of $compiler found."
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exit 1
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fi
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+
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+ CC="$(command -v "$compiler" 2> /dev/null)"
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+ CXX="$(command -v "$cxxCompiler" 2> /dev/null)"
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+ set_compiler_version_from_CC
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else
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- if [ "$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 $majorVersion which is not supported on arm/armel architectures, and there is no clang in PATH."
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- exit 1
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- fi
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+ if [ "$compiler" = "clang" ] && [ "$majorVersion" -lt 5 ] && { [ "$build_arch" = "arm" ] || [ "$build_arch" = "armel" ]; }; then
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+ # If a major version was provided explicitly, and it was too old, find a newer compiler instead
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+ if ! command -v "$compiler" > /dev/null; then
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+ echo "Error: Found clang version $majorVersion which is not supported on arm/armel architectures, and there is no clang in PATH."
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+ exit 1
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fi
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+
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+ CC="$(command -v "$compiler" 2> /dev/null)"
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+ CXX="$(command -v "$cxxCompiler" 2> /dev/null)"
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+ set_compiler_version_from_CC
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fi
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fi
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else
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desired_version="$(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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+ echo "Error: 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 "$cxxCompiler")"; fi
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+ CC="$(command -v "$compiler$desired_version" 2> /dev/null)"
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+ CXX="$(command -v "$cxxCompiler$desired_version" 2> /dev/null)"
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+ if [ -z "$CXX" ]; then CXX="$(command -v "$cxxCompiler" 2> /dev/null)"; fi
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+ set_compiler_version_from_CC
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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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+ echo "Error: 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="$CLR_CXX"
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+ set_compiler_version_from_CC
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fi
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if [ -z "$CC" ]; then
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- echo "Unable to find $compiler."
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+ echo "Error: Unable to find $compiler."
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exit 1
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fi
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-# Only lld version >= 9 can be considered stable. lld supports s390x starting from 18.0.
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-if [ "$compiler" = "clang" ] && [ -n "$majorVersion" ] && [ "$majorVersion" -ge 9 ] && ([ "$build_arch" != "s390x" ] || [ "$majorVersion" -ge 18 ]); then
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- if "$CC" -fuse-ld=lld -Wl,--version >/dev/null 2>&1; then
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- LDFLAGS="-fuse-ld=lld"
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+if [ "$__baseOS" != "Darwin" ]; then
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+ # On Darwin, we always want to use the Apple linker.
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+
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+ # Only lld version >= 9 can be considered stable. lld supports s390x starting from 18.0.
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+ if [ "$compiler" = "clang" ] && [ -n "$majorVersion" ] && [ "$majorVersion" -ge 9 ] && { [ "$build_arch" != "s390x" ] || [ "$majorVersion" -ge 18 ]; }; then
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+ if "$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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fi
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-SCAN_BUILD_COMMAND="$(command -v "scan-build$desired_version")"
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+SCAN_BUILD_COMMAND="$(command -v "scan-build$desired_version" 2> /dev/null)"
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export CC CXX LDFLAGS SCAN_BUILD_COMMAND
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dotnet-maestro[bot]