nixpkgs/pkgs/development/compilers/gcc/libstdc++-hook.sh

export NIX_CXXSTDLIB_COMPILE+="-isystem $(echo -n @gcc@/include/c++/*) -isystem $(echo -n @gcc@/include/c++/*)/$(@gcc@/bin/gcc -dumpmachine)"
export NIX_CXXSTDLIB_LINK=" -stdlib=libstdc++"
libstdc++: add setup-hook 2017-09-04 21:07:05 +02:00			`export NIX_CXXSTDLIB_COMPILE+="-isystem $(echo -n @gcc@/include/c++/) -isystem $(echo -n @gcc@/include/c++/)/$(@gcc@/bin/gcc -dumpmachine)"`
clang-stdenv: use libstdcxxHook when targeting linux 2017-09-04 21:23:57 +02:00			`export NIX_CXXSTDLIB_LINK=" -stdlib=libstdc++"`