diff options
Diffstat (limited to 'pkgs/build-support/cc-wrapper')
| -rw-r--r-- | pkgs/build-support/cc-wrapper/default.nix | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/pkgs/build-support/cc-wrapper/default.nix b/pkgs/build-support/cc-wrapper/default.nix index 597e8105fa1dd..fdc1457cc469b 100644 --- a/pkgs/build-support/cc-wrapper/default.nix +++ b/pkgs/build-support/cc-wrapper/default.nix @@ -407,7 +407,11 @@ stdenv.mkDerivation { touch "$out/nix-support/libcxx-cxxflags" touch "$out/nix-support/libcxx-ldflags" '' - + optionalString (libcxx == null && (useGccForLibs && gccForLibs.langCC or false)) '' + # Adding -isystem flags should be done only for clang; gcc + # already knows how to find its own libstdc++, and adding + # additional -isystem flags will confuse gfortran (see + # https://github.com/NixOS/nixpkgs/pull/209870#issuecomment-1500550903) + + optionalString (libcxx == null && isClang && (useGccForLibs && gccForLibs.langCC or false)) '' for dir in ${gccForLibs}${lib.optionalString (hostPlatform != targetPlatform) "/${targetPlatform.config}"}/include/c++/*; do echo "-isystem $dir" >> $out/nix-support/libcxx-cxxflags done |