Commits on Jan 28, 2023

1. build-support/cc-wrapper: add libstdc++fs into default library path f… …

   …or clang
   
   After NixOS#210004 `usbmuxd2` started
   failing to build as:
   
       usbmuxd2-unstable> .../ld: cannot find -lstdc++fs: No such file or directory
       usbmuxd2-unstable> clang-11: error: linker command failed with exit code 1 (use -v to see invocation)
   
   This started happening because NixOS#210004 exposed a long-standing bug in
   `gcc` derivation: `cc.lib` is missing `libstdc++fs` library:
   
       $ find $(nix-build --no-link -A stdenv.cc.cc.lib) | fgrep libstdc | unnix
   
       /<<NIX>>/gcc-11.3.0-lib/lib/libstdc++fs.la
   
       /<<NIX>>/gcc-11.3.0-lib/lib/libstdc++.la
       /<<NIX>>/gcc-11.3.0-lib/lib/libstdc++.so.6.0.29
       /<<NIX>>/gcc-11.3.0-lib/lib/libstdc++.so
       /<<NIX>>/gcc-11.3.0-lib/lib/libstdc++.so.6
   
   It was not moved from `cc.out` output:
   
       $ find $(nix-build --no-link -A stdenv.cc.cc) | fgrep libstdc | unnix
       /<<NIX>>/gcc-11.3.0/lib/libstdc++.a
       /<<NIX>>/gcc-11.3.0/lib/libstdc++fs.a
   
   This change adds `cc` library lookup path back to `staging-next` until
   `gcc` is fixed.`

   

   trofi committed Jan 28, 2023
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