class Gmp < Formula
  desc "GNU multiple precision arithmetic library"
  homepage "https://gmplib.org/"
  url "https://gmplib.org/download/gmp/gmp-6.1.2.tar.xz"
  mirror "https://ftp.gnu.org/gnu/gmp/gmp-6.1.2.tar.xz"
  sha256 "87b565e89a9a684fe4ebeeddb8399dce2599f9c9049854ca8c0dfbdea0e21912"
  revision 1

  bottle do
    cellar :any
    sha256 "eadb377c507f5d04e8d47861fa76471be6c09dc54991540e125ee1cbc04fecd6" => :high_sierra
    sha256 "90715336080bd2deb92bd74361f50d91fe288d18e4c18a70a8253add6aa13200" => :sierra
    sha256 "0e0c340b4c09a4f00daf45890e8f36afa03d251a8ed3bba6ae4876149914b420" => :el_capitan
  end

  def install
    args = %W[--prefix=#{prefix} --enable-cxx]
    args << "--build=core2-apple-darwin#{`uname -r`.to_i}" if build.bottle?
    system "./configure", "--disable-static", *args
    system "make"
    system "make", "check"
    system "make", "install"
    system "make", "clean"
    system "./configure", "--disable-shared", "--disable-assembly", *args
    system "make"
    lib.install Dir[".libs/*.a"]
  end

  test do
    (testpath/"test.c").write <<~EOS
      #include <gmp.h>
      #include <stdlib.h>

      int main() {
        mpz_t i, j, k;
        mpz_init_set_str (i, "1a", 16);
        mpz_init (j);
        mpz_init (k);
        mpz_sqrtrem (j, k, i);
        if (mpz_get_si (j) != 5 || mpz_get_si (k) != 1) abort();
        return 0;
      }
    EOS
    system ENV.cc, "test.c", "-L#{lib}", "-lgmp", "-o", "test"
    system "./test"
  end
end