fcgi: fix "Symbol not found: _environ"

Fixes Homebrew/homebrew#12844.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>

Formula/fcgi.rb

@@ -5,9 +5,34 @@ class Fcgi < Formula
   homepage 'http://www.fastcgi.com/'
   md5 'd15060a813b91383a9f3c66faf84867e'
 
+  def patches
+    # https://trac.macports.org/browser/trunk/dports/www/fcgi/files/patch-libfcgi-fcgi_stdio.c.diff
+    # Fixes "dyld: Symbol not found: _environ"
+    # Affects programs linking this library. Reported at
+    # http://mailman.fastcgi.com/pipermail/fastcgi-developers/2009-January/000152.html
+    DATA
+  end
+
   def install
     system "./configure", "--disable-debug", "--disable-dependency-tracking",
                           "--prefix=#{prefix}"
     system "make install"
   end
 end
+
+__END__
+--- a/libfcgi/fcgi_stdio.c
++++ b/libfcgi/fcgi_stdio.c
+@@ -40,7 +40,12 @@
+
+ #ifndef _WIN32
+
++#if defined(__APPLE__)
++#include <crt_externs.h>
++#define environ (*_NSGetEnviron())
++#else
+ extern char **environ;
++#endif
+
+ #ifdef HAVE_FILENO_PROTO
+ #include <stdio.h>