[vala] Warn if -X is used in combination with -C

[Luca Bruno <lucabru src gnome org>]

commit 74d32300100a3037685c635ba09b78392f70459b
Author: Florian Brosch <flo brosch gmail com>
Date:   Thu Jul 10 05:05:09 2014 +0200

    Warn if -X is used in combination with -C

 compiler/valacompiler.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/compiler/valacompiler.vala b/compiler/valacompiler.vala
index 9838273..cc7abe0 100644
--- a/compiler/valacompiler.vala
+++ b/compiler/valacompiler.vala
@@ -188,6 +188,9 @@ class Vala.Compiler {
                context.version_header = !disable_version_header;
 
                context.ccode_only = ccode_only;
+               if (ccode_only && cc_options != null) {
+                       Report.warning (null, "-X has no effect when -C or --ccode is set");
+               }
                context.compile_only = compile_only;
                context.header_filename = header_filename;
                if (header_filename == null && use_header) {