nixpkgs/pkgs/build-support/cc-wrapper/add-clang-cc-cflags-before.sh

needsTarget=true

for p in "${params[@]}"; do
    case "$p" in
    -target | --target=*)
        needsTarget=false

        echo "Warning: supplying the --target argument to a nix-wrapped compiler may not work correctly - cc-wrapper is currently not designed with multi-target compilers in mind. You may want to use an un-wrapped compiler instead." >&2
        ;;
    esac
done

if $needsTarget && [[ $0 != *cpp ]]; then
    extraBefore+=(-target @defaultTarget@ @machineFlags@)
fi
cc-wrapper: Add clang specific options to clang specific file This way gcc doesn't need to be rebuilt because of clang. This also avoids rebuilding clang when only the wrapper needs to be tweaked. 2022-06-13 18:24:52 +00:00			`needsTarget=true`

			`for p in "${params[@]}"; do`
			`case "$p" in`
cc-wrapper: warn if clang's --target option is used on a wrapped compiler 2024-06-30 17:41:21 +00:00			`-target \| --target=*)`
			`needsTarget=false`

			`echo "Warning: supplying the --target argument to a nix-wrapped compiler may not work correctly - cc-wrapper is currently not designed with multi-target compilers in mind. You may want to use an un-wrapped compiler instead." >&2`
			`;;`
cc-wrapper: Add clang specific options to clang specific file This way gcc doesn't need to be rebuilt because of clang. This also avoids rebuilding clang when only the wrapper needs to be tweaked. 2022-06-13 18:24:52 +00:00			`esac`
			`done`

cc-wrapper: exclude clang flags when cpp 2024-07-24 05:53:06 +00:00			`if $needsTarget && [[ $0 != *cpp ]]; then`
clang: don't set machine flags for overridden target We already did this for -march in 12b0e8ac74f8 ("clang: don't set -march for overridden target"), but it should have been done for all machine flags, for the same reason. Example bug this fixes: nix-shell -E ' with import ./. { crossSystem = { system = "powerpc64le-linux"; gcc.cpu = "power10"; }; }; clangStdenv.mkDerivation { name = "test"; } ' --run '$CC -target wasm32-unknown-unknown -c /dev/null' Which previously failed with: clang: error: unsupported option '-mcpu=' for target 'wasm32-unknown-unknown' 2024-06-04 19:06:58 +00:00			`extraBefore+=(-target @defaultTarget@ @machineFlags@)`
cc-wrapper: Add clang specific options to clang specific file This way gcc doesn't need to be rebuilt because of clang. This also avoids rebuilding clang when only the wrapper needs to be tweaked. 2022-06-13 18:24:52 +00:00			`fi`