{ lib
, kaem
, mes-libc
}:

rec {

  # Recompile libc: crt{1,n,i}, libtcc.a, libc.a, libgetopt.a
  recompileLibc =
    { tcc
    , pname
    , version
    , src
    , libtccOptions
    }:
    let

    crt = kaem.runCommand "crt" {} ''
      mkdir -p ''${out}/lib
      ${tcc}/bin/tcc ${mes-libc.CFLAGS} -c -o ''${out}/lib/crt1.o ${mes-libc}/lib/crt1.c
      ${tcc}/bin/tcc ${mes-libc.CFLAGS} -c -o ''${out}/lib/crtn.o ${mes-libc}/lib/crtn.c
      ${tcc}/bin/tcc ${mes-libc.CFLAGS} -c -o ''${out}/lib/crti.o ${mes-libc}/lib/crti.c
    '';

    library = lib: options: source: kaem.runCommand "${lib}.a" {} ''
      ${tcc}/bin/tcc ${options} -c -o ${lib}.o ${source}
      ${tcc}/bin/tcc -ar cr ''${out} ${lib}.o
    '';

    libtcc1 = library "libtcc1" libtccOptions "${src}/lib/libtcc1.c";
    libc = library "libc" mes-libc.CFLAGS "${mes-libc}/lib/libc.c";
    libgetopt = library "libgetopt" mes-libc.CFLAGS "${mes-libc}/lib/libgetopt.c";
  in
  kaem.runCommand "${pname}-libs-${version}" {} ''
    mkdir -p ''${out}/lib
    cp ${crt}/lib/crt1.o ''${out}/lib
    cp ${crt}/lib/crtn.o ''${out}/lib
    cp ${crt}/lib/crti.o ''${out}/lib
    cp ${libtcc1} ''${out}/lib/libtcc1.a
    cp ${libc} ''${out}/lib/libc.a
    cp ${libgetopt} ''${out}/lib/libgetopt.a
  '';

  buildTinyccMes =
    { pname
    , version
    , src
    , prev
    , buildOptions
    , libtccBuildOptions
    , meta
    }:
    let
      options = lib.strings.concatStringsSep " " buildOptions;
      libtccOptions = lib.strings.concatStringsSep " "
        (["-c" "-D" "TCC_TARGET_I386=1" ] ++ libtccBuildOptions);
      compiler =  kaem.runCommand "${pname}-${version}" {
        inherit pname version meta;
        passthru.tests = rec {
          get-version = result: kaem.runCommand "${pname}-get-version-${version}" {} ''
            ${result}/bin/tcc -version
            mkdir ''${out}
          '';
          chain = result: kaem.runCommand "${pname}-chain-${version}" {} ''
            echo ${prev.compiler.tests.chain or prev.compiler.tests.get-version};
            ${result}/bin/tcc -version
            mkdir ''${out}
          '';
        };
      } ''
        catm config.h
        mkdir -p ''${out}/bin
        ${prev.compiler}/bin/tcc \
          -B ${prev.libs}/lib \
          -g \
          -v \
          -o ''${out}/bin/tcc \
          -D BOOTSTRAP=1 \
          ${options} \
          -I . \
          -I ${src} \
          -D TCC_TARGET_I386=1 \
          -D CONFIG_TCCDIR=\"\" \
          -D CONFIG_SYSROOT=\"\" \
          -D CONFIG_TCC_CRTPREFIX=\"{B}\" \
          -D CONFIG_TCC_ELFINTERP=\"\" \
          -D CONFIG_TCC_LIBPATHS=\"{B}\" \
          -D CONFIG_TCC_SYSINCLUDEPATHS=\"${mes-libc}/include\" \
          -D TCC_LIBGCC=\"libc.a\" \
          -D TCC_LIBTCC1=\"libtcc1.a\" \
          -D CONFIG_TCCBOOT=1 \
          -D CONFIG_TCC_STATIC=1 \
          -D CONFIG_USE_LIBGCC=1 \
          -D TCC_MES_LIBC=1 \
          -D TCC_VERSION=\"${version}\" \
          -D ONE_SOURCE=1 \
          ${src}/tcc.c
      '';
    libs = recompileLibc {
      inherit pname version src libtccOptions;
      tcc = compiler;
    };
  in { inherit prev compiler libs; };
}