x86_64-elf-gcc 11 version for cross-compiling - pintos

x86_64-elf-gcc@11.rb

class X8664ElfGccAT11 < Formula
  desc "GNU compiler collection for x86_64-elf"
  homepage "https://gcc.gnu.org"
  url "https://ftp.gnu.org/gnu/gcc/gcc-11.4.0/gcc-11.4.0.tar.xz"
  mirror "https://ftpmirror.gnu.org/gcc/gcc-11.4.0/gcc-11.4.0.tar.xz"
  sha256 "3f2db222b007e8a4a23cd5ba56726ef08e8b1f1eb2055ee72c1402cea73a8dd9"
  license "GPL-3.0-or-later" => { with: "GCC-exception-3.1" }

  livecheck do
    formula "gcc"
  end

  depends_on "gmp"
  depends_on "libmpc"
  depends_on "mpfr"
  depends_on "x86_64-elf-binutils"
  depends_on "zstd"

  uses_from_macos "zlib"

  cxxstdlib_check :skip

  patch do
    url "https://raw.githubusercontent.com/Homebrew/formula-patches/c233b1a8d81b9c9f5827510d8d285080ee11de2e/gcc/gcc-11.4.0.diff"
    sha256 "440f6e965966c86a7925506e63eb06f7f54c00b1d146db8d0c567bdb8820072f"
  end

  def install
    target = "x86_64-elf"
    sdk = MacOS.sdk_path_if_needed
    mkdir "x86_64-elf-gcc-11-build" do
      system "../configure", "--target=#{target}",
                             "--prefix=#{prefix}",
                             "--infodir=#{info}/#{target}",
                             "--disable-nls",
                             "--without-isl",
                             "--without-headers",
                             "--with-as=#{Formula["x86_64-elf-binutils"].bin}/x86_64-elf-as",
                             "--with-ld=#{Formula["x86_64-elf-binutils"].bin}/x86_64-elf-ld",
                             "--with-zstd=#{Formula["zstd"].opt_prefix}",
                             "--program-prefix=#{target}-",
                             "--program-suffix=-#{version.major}",
                             "--with-system-zlib",
                             "--with-sysroot=#{sdk}",
                             "--enable-languages=c,c++"
      system "make", "all-gcc"
      system "make", "install-gcc"
      system "make", "all-target-libgcc"
      system "make", "install-target-libgcc"

      # FSF-related man pages may conflict with native gcc
      (share/"man/man7").rmtree
    end
  end

  test do
    (testpath/"test-c.c").write <<~EOS
      int main(void)
      {
        int i=0;
        while(i<10) i++;
        return i;
      }
    EOS
    system "#{bin}/x86_64-elf-gcc-#{version.major}", "-c", "-o", "test-c.o", "test-c.c"
    assert_match "file format elf64-x86-64",
      shell_output("#{Formula["x86_64-elf-binutils"].bin}/x86_64-elf-objdump -a test-c.o")
  end
end

I made this one for porting pintos execution environment to apple silicon mac.
Use only at your own risk.

$ brew install -v --build-from-source x86_64-elf-gcc@11.rb