Setting up a nix-env that can compile C libraries

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My colleague hawkw (Eliza Weisman) · GitHub was able to come up with a config that fixed this specific issue:

I think the important bit is including something like the following in shell.nix:

  shellHook = ''
    export BINDGEN_EXTRA_CLANG_ARGS="$(< ${stdenv.cc}/nix-support/libc-crt1-cflags) \
          $(< ${stdenv.cc}/nix-support/libc-cflags) \
          $(< ${stdenv.cc}/nix-support/cc-cflags) \
          $(< ${stdenv.cc}/nix-support/libcxx-cxxflags) \
          ${
            lib.optionalString stdenv.cc.isClang
            "-idirafter ${stdenv.cc.cc}/lib/clang/${
              lib.getVersion stdenv.cc.cc
            }/include"
          } \
          ${
            lib.optionalString stdenv.cc.isGNU
            "-isystem ${stdenv.cc.cc}/include/c++/${
              lib.getVersion stdenv.cc.cc
            } -isystem ${stdenv.cc.cc}/include/c++/${
              lib.getVersion stdenv.cc.cc
            }/${stdenv.hostPlatform.config} -idirafter ${stdenv.cc.cc}/lib/gcc/${stdenv.hostPlatform.config}/${
              lib.getVersion stdenv.cc.cc
            }/include"
          } \
        "
        '';

I think this was inspired by Using rust-bindgen in Nix

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