diff --git a/pkgs/stdenv/adapters.nix b/pkgs/stdenv/adapters.nix index 463fd7e4847d..84d3258949eb 100644 --- a/pkgs/stdenv/adapters.nix +++ b/pkgs/stdenv/adapters.nix @@ -237,6 +237,30 @@ rec { }); }); + useLibsFrom = modelStdenv: targetStdenv: + let + ccForLibs = modelStdenv.cc.cc; + cc = pkgs.wrapCCWith { + /* NOTE: cc.cc is the unwrapped compiler. Should we respect the old + * wrapper instead? */ + cc = targetStdenv.cc.cc; + + /* NOTE(originally by rrbutani): + * Normally the `useCcForLibs`/`gccForLibs` mechanism is used to get a + * clang based `cc` to use `libstdc++` (from gcc). + * + * Here we (ab)use it to use a `libstdc++` from a different `gcc` than our + * `cc`. + * + * Note that this does not inhibit our `cc`'s lib dir from being added to + * cflags/ldflags (see `cc_solib` in `cc-wrapper`) but this is okay: our + * `gccForLibs`'s paths should take precedence. */ + useCcForLibs = true; + gccForLibs = ccForLibs; + }; + in + overrideCC targetStdenv cc; + useMoldLinker = stdenv: let bintools = stdenv.cc.bintools.override { extraBuildCommands = ''