gforth: fix 64-bit builds

Closes #16836.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 21 insertions, 4 deletions

diff --git a/Library/Formula/gforth.rb b/Library/Formula/gforth.rb
index 9f36f3f21..c870f4857 100644
--- a/Library/Formula/gforth.rb
+++ b/Library/Formula/gforth.rb
@@ -5,12 +5,29 @@ class Gforth < Formula
   url 'http://www.complang.tuwien.ac.at/forth/gforth/gforth-0.7.0.tar.gz'
   sha1 '5bb357268cba683f2a8c63d2a4bcab8f41cb0086'
 
+  depends_on :libtool
+  depends_on 'libffi'
+  depends_on 'pcre'
+
+  def darwin_major_version
+    # kern.osrelease: 11.4.2
+    full_version = `/usr/sbin/sysctl -n kern.osrelease`
+    full_version.split("\.")[0]
+  end
+
   def install
     ENV.j1 # Parallel builds won't work
-    # Install 32-bit only, even on Snow Leopard. See:
-    # http://www.groupsrv.com/computers/about648918.html
-    ENV['CC'] = "#{ENV.cc} -m32"
-    system "./configure", "--disable-debug", "--disable-dependency-tracking", "--prefix=#{prefix}"
+    args = %W[
+      --disable-debug
+      --disable-dependency-tracking
+      --prefix=#{prefix}
+    ]
+
+    if MacOS.prefer_64_bit?
+      args << "--build=x86_64-apple-darwin#{darwin_major_version}"
+    end
+
+    system "./configure", *args
     system "make" # Separate build steps.
     system "make install"
   end