{ preparePort, nixpkgs, toolchain, upstream }:

let
  inherit (nixpkgs.buildPackages)  fetchurl fetchgit flex bison;
  libc = import ./../libc { inherit preparePort nixpkgs toolchain upstream; };
  libm = import ./../libm { inherit preparePort nixpkgs toolchain upstream; };
  version = "8.3.0";
in
preparePort {
  name = "stdcxx-${version}";
  outputs = [ "source" "dev" ];
  inherit version;

  depsBuildBuild = with nixpkgs.buildPackages; [ pkgconfig stdenv.cc ];
  buildInputs = [ toolchain ];

  src = fetchurl {
    url = "mirror://gnu/gcc/gcc-${version}/gcc-${version}.tar.xz";
    sha256 = "0b3xv411xhlnjmin2979nxcbnidgvzqdf4nbhix99x60dkzavfk4";
  };

  tarFlags =
    [ "gcc-${version}/libstdc++-v3"
      "gcc-${version}/libgcc/gthr-single.h"
    ];

  sourceRoot = "gcc-${version}/libstdc++-v3";

  patches = "${upstream.src}/repos/libports/src/lib/stdcxx/patches}/*.patch";
  patchFlags = "-p1";

  buildPhase =
    ''
      for slop in include/c_global/cstdlib include/bits/std_abs.h include/c_global/cmath; do
          sed 's/^#include_next/#include/' -i $slop
      done

      mkdir -p $dev/lib
      compileStub ${./stdcxx.symbols} $dev/lib/stdcxx.lib.so
    '';

  installPhase =
    ''
      mkdir -p $source $includedir/bits $includedir/config $pkgconfigdir

      local libcPc=${libc.dev}/lib/pkgconfig/libc.pc
      local libmPc=${libm.dev}/lib/pkgconfig/libm.pc
      libcCflags=`awk '/^Cflags/ { $1=""; print $0 }' $libcPc` \
      libmCflags=`awk '/^Cflags/ { $1=""; print $0 }' $libmPc` \
          substituteAll ${./stdcxx.pc.in} $pkgconfigdir/stdcxx.pc

      cp -r src config libsupc++ $source

      cp -r \
          include/* \
          include/c_compatibility/complex.h \
          include/c_compatibility/fenv.h \
          include/c_compatibility/tgmath.h \
          libsupc++/cxxabi.h \
          libsupc++/exception \
          libsupc++/initializer_list \
          libsupc++/new \
          libsupc++/typeinfo \
          $includedir

      cp -r \
          libsupc++/atomic_lockfree_defines.h \
          libsupc++/cxxabi_forced.h \
          libsupc++/cxxabi_init_exception.h \
          libsupc++/exception.h \
          libsupc++/exception_defines.h \
          libsupc++/exception_ptr.h \
          libsupc++/hash_bytes.h \
          libsupc++/nested_exception.h \
          config/cpu/generic/atomic_word.h \
          config/cpu/generic/cpu_defines.h \
          config/cpu/generic/cxxabi_tweaks.h \
          config/cpu/generic/opt/bits/opt_random.h \
          config/os/generic/ctype_base.h \
          config/os/generic/ctype_inline.h \
          config/os/generic/error_constants.h \
          config/os/generic/os_defines.h \
          config/locale/generic/messages_members.h \
          config/locale/generic/time_members.h \
          ${upstream.src}/repos/libports/include/stdcxx/bits/*.h \
          $includedir/bits

      cp -r \
          config/allocator/new_allocator_base.h \
          config/io/basic_file_stdio.h \
          config/io/c_io_stdio.h \
          config/locale/generic/c_locale.h \
          $includedir/config

	cp config/io/basic_file_stdio.h $includedir/bits/basic_file.h
	cp config/allocator/new_allocator_base.h $includedir/bits/c++allocator.h
	cp config/io/c_io_stdio.h $includedir/bits/c++io.h
	cp config/locale/generic/c_locale.h $includedir/bits/c++locale.h
	cp ../libgcc/gthr-single.h $includedir/bits/gthr.h
    '';

}