fceux: add patch to pass pkg-config vars through scons

Formula/fceux.rb

@@ -15,6 +15,10 @@ class Fceux < Formula
   depends_on 'lua'
   depends_on :x11
 
+  # Make scons honor PKG_CONFIG_PATH and PKG_CONFIG_LIBDIR
+  # Reported upstream: https://sourceforge.net/p/fceultra/bugs/625
+  def patches; DATA; end
+
   def install
     args = []
     args << "GTK=0" if build.include? "no-gtk"
@@ -22,3 +26,50 @@ class Fceux < Formula
     bin.install 'src/fceux'
   end
 end
+
+__END__
+diff --git a/SConstruct b/SConstruct
+index 4d5b446..36be2c4 100644
+--- a/SConstruct
++++ b/SConstruct
+@@ -62,6 +62,10 @@ if os.environ.has_key('CPPFLAGS'):
+   env.Append(CPPFLAGS = os.environ['CPPFLAGS'].split())
+ if os.environ.has_key('LDFLAGS'):
+   env.Append(LINKFLAGS = os.environ['LDFLAGS'].split())
++if os.environ.has_key('PKG_CONFIG_PATH'):
++  env['ENV']['PKG_CONFIG_PATH'] = os.environ['PKG_CONFIG_PATH']
++if os.environ.has_key('PKG_CONFIG_LIBDIR'):
++  env['ENV']['PKG_CONFIG_LIBDIR'] = os.environ['PKG_CONFIG_LIBDIR']
+ 
+ print "platform: ", env['PLATFORM']
+ 
+@@ -112,16 +116,12 @@ else:
+       Exit(1)
+     # Add compiler and linker flags from pkg-config
+     config_string = 'pkg-config --cflags --libs gtk+-2.0'
+-    if env['PLATFORM'] == 'darwin':
+-      config_string = 'PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig/ ' + config_string
+     env.ParseConfig(config_string)
+     env.Append(CPPDEFINES=["_GTK2"])
+     env.Append(CCFLAGS = ["-D_GTK"])
+   if env['GTK3']:
+     # Add compiler and linker flags from pkg-config
+     config_string = 'pkg-config --cflags --libs gtk+-3.0'
+-    if env['PLATFORM'] == 'darwin':
+-      config_string = 'PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig/ ' + config_string
+     env.ParseConfig(config_string)
+     env.Append(CPPDEFINES=["_GTK3"])
+     env.Append(CCFLAGS = ["-D_GTK"])
+diff --git a/src/drivers/sdl/SConscript b/src/drivers/sdl/SConscript
+index 7a53b07..23e11b9 100644
+--- a/src/drivers/sdl/SConscript
++++ b/src/drivers/sdl/SConscript
+@@ -2,8 +2,6 @@
+ # Thanks Antonio Ospite!
+ Import('env')
+ config_string = 'pkg-config --cflags --libs x11'
+-if env['PLATFORM'] == 'darwin':
+-  config_string = 'PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig/ ' + config_string
+ env.ParseConfig(config_string)
+ Export('env')
+