scons: builtin_glsl_function on windows needs bundled getopt.

src/glsl/SConscript

@@ -82,7 +82,9 @@ sources = [
 ] 
 
 
-if not env['crosscompile'] or env['platform'] == 'embedded':
+if env['crosscompile'] and env['platform'] != 'embedded':
+    Import('builtin_glsl_function')
+else:
     if env['msvc']:
         env.Prepend(CPPPATH = ['#/src/getopt'])
         env.PrependUnique(LIBS = [getopt])
@@ -105,6 +107,10 @@ if not env['crosscompile'] or env['platform'] == 'embedded':
 
     Export('builtin_glsl_function')
 
+    if env['hostonly']:
+        Return()
+
+
 sources += builtin_glsl_function
 
 glsl = env.ConvenienceLibrary(