gcc45.rb

class Gcc45 < Formula
  def arch
    if Hardware::CPU.type == :intel
      if MacOS.prefer_64_bit?
        "x86_64"
      else
        "i686"
      end
    elsif Hardware::CPU.type == :ppc
      if MacOS.prefer_64_bit?
        "powerpc64"
      else
        "powerpc"
      end
    end
  end

  def osmajor
    `uname -r`.chomp
  end

  desc "GNU compiler collection"
  homepage "https://gcc.gnu.org"
  url "http://ftpmirror.gnu.org/gcc/gcc-4.5.4/gcc-4.5.4.tar.bz2"
  mirror "https://ftp.gnu.org/gnu/gcc/gcc-4.5.4/gcc-4.5.4.tar.bz2"
  sha256 "eef3f0456db8c3d992cbb51d5d32558190bc14f3bc19383dd93acc27acc6befc"

  bottle do
    sha256 "16c2a3e56e2da8ec6b38b36c54112d7c56bc05f71168fb867f586cb190c5fef7" => :yosemite
    sha256 "51b73412c9628a593e765105a098ed1500b04574145391f3f93972e54d5b1b05" => :mavericks
    sha256 "06806e0a4aa703b0cacb4a3e10b4c8738d3d97535c6dd52796ec5a85eee0638d" => :mountain_lion
  end

  option "with-fortran", "Build the gfortran compiler"
  option "with-java", "Build the gcj compiler"
  option "with-all-languages", "Enable all compilers and languages, except Ada"
  option "with-nls", "Build with native language support (localization)"
  option "with-profiled-build", "Make use of profile guided optimization when bootstrapping GCC"
  # enabling multilib on a host that can't run 64-bit results in build failures
  option "without-multilib", "Build without multilib support" if MacOS.prefer_64_bit?

  deprecated_option "enable-fortran" => "with-fortran"
  deprecated_option "enable-java" => "with-java"
  deprecated_option "enable-all-languages" => "with-all-languages"
  deprecated_option "enable-nls" => "with-nls"
  deprecated_option "enable-profiled-build" => "with-profiled-build"
  deprecated_option "disable-multilib" => "without-multilib"

  # with system ld on Tiger, build fails with countless messages of:
  # "relocation overflow for relocation entry"
  depends_on :ld64
  depends_on "gmp4"
  depends_on "libmpc08"
  depends_on "mpfr2"
  depends_on "ppl011"
  depends_on "cloog-ppl015"
  depends_on "ecj" if build.with?("java") || build.with?("all-languages")

  # Fix libffi for ppc, from MacPorts
  patch :p0 do
    url "https://trac.macports.org/export/110576/trunk/dports/lang/gcc45/files/ppc_fde_encoding.diff"
    sha256 "9c5f6fd30d089e97e0364af322272bb06f3d107f357d2b621503ebfbbb4a5af7"
  end

  # Handle OS X deployment targets correctly (GCC PR target/63810 <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63810>).
  patch :p0 do
    url "https://trac.macports.org/export/129382/trunk/dports/lang/gcc45/files/macosx-version-min.patch"
    sha256 "9083143d2c60fbd89d33354710381590da770973746dd6849e18835f449510bc"
  end

  fails_with :llvm

  # The bottles are built on systems with the CLT installed, and do not work
  # out of the box on Xcode-only systems due to an incorrect sysroot.
  def pour_bottle?
    MacOS::CLT.installed?
  end

  # GCC bootstraps itself, so it is OK to have an incompatible C++ stdlib
  cxxstdlib_check :skip

  def install
    # GCC will suffer build errors if forced to use a particular linker.
    ENV.delete "LD"

    if build.with? "all-languages"
      # Everything but Ada, which requires a pre-existing GCC Ada compiler
      # (gnat) to bootstrap.
      languages = %w[c c++ fortran java objc obj-c++]
    else
      # C, C++, ObjC compilers are always built
      languages = %w[c c++ objc obj-c++]

      languages << "fortran" if build.with? "fortran"
      languages << "java" if build.with? "java"
    end

    version_suffix = version.to_s.slice(/\d\.\d/)

    args = [
      "--build=#{arch}-apple-darwin#{osmajor}",
      "--prefix=#{prefix}",
      "--enable-languages=#{languages.join(",")}",
      # Make most executables versioned to avoid conflicts.
      "--program-suffix=-#{version_suffix}",
      "--with-gmp=#{Formula["gmp4"].opt_prefix}",
      "--with-mpfr=#{Formula["mpfr2"].opt_prefix}",
      "--with-mpc=#{Formula["libmpc08"].opt_prefix}",
      "--with-ppl=#{Formula["ppl011"].opt_prefix}",
      "--with-cloog=#{Formula["cloog-ppl015"].opt_prefix}",
      "--with-system-zlib",
      # This ensures lib, libexec, include are sandboxed so that they
      # don't wander around telling little children there is no Santa
      # Claus.
      "--enable-version-specific-runtime-libs",
      "--enable-libstdcxx-time=yes",
      "--enable-stage1-checking",
      "--enable-checking=release",
      # GCC 4.5 does not properly support LTO on Darwin.
      "--disable-lto",
      # A no-op unless --HEAD is built because in head warnings will
      # raise errors. But still a good idea to include.
      "--disable-werror",
      "--with-pkgversion=Homebrew #{name} #{pkg_version} #{build.used_options*" "}".strip,
      "--with-bugurl=https://github.com/Homebrew/homebrew-versions/issues",
    ]

    # "Building GCC with plugin support requires a host that supports
    # -fPIC, -shared, -ldl and -rdynamic."
    args << "--enable-plugin" if MacOS.version > :tiger

    # Otherwise make fails during comparison at stage 3
    # See: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45248
    args << "--with-dwarf2" if MacOS.version < :leopard

    args << "--disable-nls" if build.without? "nls"

    if build.with?("java") || build.with?("all-languages")
      args << "--with-ecj-jar=#{Formula["ecj"].opt_prefix}/share/java/ecj.jar"
    end

    if !MacOS.prefer_64_bit? || build.without?("multilib")
      args << "--disable-multilib"
    else
      args << "--enable-multilib"
    end

    mkdir "build" do
      unless MacOS::CLT.installed?
        # For Xcode-only systems, we need to tell the sysroot path.
        # "native-system-headers" will be appended
        args << "--with-native-system-header-dir=/usr/include"
        args << "--with-sysroot=#{MacOS.sdk_path}"
      end

      system "../configure", *args

      if build.with? "profiled-build"
        # Takes longer to build, may bug out. Provided for those who want to
        # optimise all the way to 11.
        system "make", "profiledbootstrap"
      else
        system "make", "bootstrap"
      end

      # At this point `make check` could be invoked to run the testsuite. The
      # deja-gnu formula must be installed in order to do this.
      system "make", "install"

      # `make install` neglects to transfer an essential plugin header file.
      Pathname.new(Dir[prefix.join "**", "plugin", "include", "config"].first).install "../gcc/config/darwin-sections.def" if MacOS.version > :tiger
    end

    # Handle conflicts between GCC formulae.
    # Remove libffi stuff, which is not needed after GCC is built.
    Dir.glob(prefix/"**/libffi.*") { |file| File.delete file }
    # Rename libiberty.a.
    Dir.glob(prefix/"**/libiberty.*") { |file| add_suffix file, version_suffix }
    # Rename man7.
    Dir.glob(man7/"*.7") { |file| add_suffix file, version_suffix }

    # Even when suffixes are appended, the info pages conflict when
    # install-info is run. Fix this.
    info.rmtree

    # Rename java properties
    if build.with?("java") || build.with?("all-languages")
      config_files = [
        "#{lib}/logging.properties",
        "#{lib}/security/classpath.security",
        "#{lib}/i386/logging.properties",
        "#{lib}/i386/security/classpath.security",
      ]

      config_files.each do |file|
        add_suffix file, version_suffix if File.exist? file
      end
    end
  end

  def add_suffix(file, suffix)
    dir = File.dirname(file)
    ext = File.extname(file)
    base = File.basename(file, ext)
    File.rename file, "#{dir}/#{base}-#{suffix}#{ext}"
  end

  test do
    (testpath/"hello-c.c").write <<-EOS.undent
      #include <stdio.h>
      int main()
      {
        puts("Hello, world!");
        return 0;
      }
    EOS
    system bin/"gcc-4.5", "-o", "hello-c", "hello-c.c"
    assert_equal "Hello, world!\n", `./hello-c`
  end
end