vala: Report warning if --target-glib=auto was not evaluated successfully

and don't try to process the valid "auto" string any further.

diff --git a/vala/valacodecontext.vala b/vala/valacodecontext.vala
index dd1c6db124905b553232d948720d6364cef484e1..5ee2d8246cd1778948cb395eefd63ba6bdd2be36 100644 (file)
--- a/vala/valacodecontext.vala
+++ b/vala/valacodecontext.vala
@@ -634,8 +634,10 @@ public class Vala.CodeContext {
                        if (available_glib != null && available_glib.scanf ("%d.%d", out glib_major, out glib_minor) >= 2) {
                                glib_minor -= ++glib_minor % 2;
                                set_target_glib_version ("%d.%d".printf (glib_major, glib_minor));
-                               return;
+                       } else {
+                               Report.warning (null, "Could not determine the version of `glib-2.0', target version of glib was not set");
                        }
+                       return;
                }
 
                glib_major = target_glib_major;