class Mpfr < Formula
  homepage "http://www.mpfr.org/"
  # Upstream is down a lot, so use the GNU mirror + Gist for patches
  url "http://ftpmirror.gnu.org/mpfr/mpfr-3.1.2.tar.bz2"
  mirror "https://ftp.gnu.org/gnu/mpfr/mpfr-3.1.2.tar.bz2"
  sha1 "46d5a11a59a4e31f74f73dd70c5d57a59de2d0b4"
  version "3.1.2-p10"

  bottle do
    cellar :any
    revision 1
    sha1 "7950d0c8f2e68673099516b7c2026055e75d1f9d" => :yosemite
    sha1 "6e63f815013d281187fd6017aeb8ee9f24ca9ad2" => :mavericks
    sha1 "40956fd01c8882333cdaf447eb637480ac8520e8" => :mountain_lion
  end

  # http://www.mpfr.org/mpfr-current/allpatches
  patch do
    url "https://gist.githubusercontent.com/jacknagel/7f276cd60149a1ffc9a7/raw/39116c674a8c340fef880a393d7c7bdc6d73c59e/mpfr-3.1.2-p10.diff"
    sha1 "c101708c6f7d86a3f7309c2e046d907ac36d6aa4"
  end

  depends_on "gmp"

  option "32-bit"

  fails_with :clang do
    build 421
    cause <<-EOS.undent
      clang build 421 segfaults while building in superenv;
      see https://github.com/Homebrew/homebrew/issues/15061
      EOS
  end

  def install
    ENV.m32 if build.build_32_bit?
    system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}"
    system "make"
    system "make", "check"
    system "make", "install"
  end

  test do
    (testpath/"test.c").write <<-EOS.undent
      #include <gmp.h>
      #include <mpfr.h>

      int main()
      {
        mpfr_t x;
        mpfr_init(x);
        mpfr_clear(x);
        return 0;
      }
    EOS
    system ENV.cc, "test.c", "-lgmp", "-lmpfr", "-o", "test"
    system "./test"
  end
end