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 ;;
    esac
done

if $needsTarget; then
    extraBefore+=(-target @defaultTarget@ @march@)
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`
			`-target \| --target=*) needsTarget=false ;;`
			`esac`
			`done`

			`if $needsTarget; then`
clang: don't set -march for overridden target If -target is explicitly passed to clang, we shouldn't pass our -march value for the default target, because it probably won't exist for the target being used. Up until now, clang has been lenient with this, but it's a hard error with clang 17, so since gcc.arch is always set on aarch64, fixing this is a hard requirement for upgrading our default clang to 17. Before (with clang 17 on aarch64-linux): $ clang -target bpf -c -o /dev/null test.bpf.c clang: warning: ignoring '-fstack-protector-strong' option as it is not currently supported for target 'bpf' [-Woption-ignored] clang: error: unsupported option '-march=' for target 'bpf' clang: warning: argument unused during compilation: '--gcc-toolchain=/nix/store/cngak08nb1yk44gnjipv5rg1ahh1xkax-gcc-13.2.0' [-Wunused-command-line-argument] After: $ clang -target bpf -c -o /dev/null test.bpf.c clang: warning: ignoring '-fstack-protector-strong' option as it is not currently supported for target 'bpf' [-Woption-ignored] clang: warning: argument unused during compilation: '--gcc-toolchain=/nix/store/cngak08nb1yk44gnjipv5rg1ahh1xkax-gcc-13.2.0' [-Wunused-command-line-argument] 2024-02-27 18:30:29 +00:00			`extraBefore+=(-target @defaultTarget@ @march@)`
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`