X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=glenv.c;h=76f669334eba354d270fafd752576fcee0704587;hb=25190a5158256abe6be58bdb2065ed7f6a403fa5;hp=6d27ad4bf402b6d380d619bb9730b50443714c76;hpb=455de90fada991ed423c5cd4f20269fc63653d90;p=glenv

diff --git a/glenv.c b/glenv.c
index 6d27ad4..76f6693 100644
--- a/glenv.c
+++ b/glenv.c
@@ -114,6 +114,14 @@ enum {
 	EXTENSIONS_BLACKLIST_OPT
 };
 
+static void
+invalid_combination (const char *second, const char *first)
+{
+	fprintf (stderr, "Error: Option %s cannot be specified after %s\n",
+		 second, first);
+	exit (1);
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -172,12 +180,24 @@ main (int argc, char *argv[])
 			options.shading_language_version = optarg;
 			break;
 		case EXTENSIONS_OPT:
+			if (options.extensions_whitelist)
+				invalid_combination ("--extensions", "--extensions-whitelist");
+			if (options.extensions_blacklist)
+				invalid_combination ("--extensions", "--extensions-blacklist");
 			options.extensions = optarg;
 			break;
 		case EXTENSIONS_WHITELIST_OPT:
+			if (options.extensions)
+				invalid_combination ("--extensions-whitelist", "--extensions");
+			if (options.extensions_blacklist)
+				invalid_combination ("--extensions-whitelist", "--extensions-blacklist");
 			options.extensions_whitelist = optarg;
 			break;
 		case EXTENSIONS_BLACKLIST_OPT:
+			if (options.extensions)
+				invalid_combination ("--extensions-blacklist", "--extensions");
+			if (options.extensions_whitelist)
+				invalid_combination ("--extensions-blacklist", "--extensions-whitelist");
 			options.extensions_blacklist = optarg;
 			break;
 		default: