glcpp: Add #error support.

diff --git a/src/glsl/glcpp/glcpp-lex.l b/src/glsl/glcpp/glcpp-lex.l
index afddd7d..6a91b09 100644 (file)
--- a/src/glsl/glcpp/glcpp-lex.l
+++ b/src/glsl/glcpp/glcpp-lex.l
@@ -24,6 +24,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <ctype.h>
 
 #include "glcpp.h"
 #include "glcpp-parse.h"
@@ -139,6 +140,13 @@ HEXADECIMAL_INTEGER        0[xX][0-9a-fA-F]+[uU]?
        }
 }
 
+{HASH}error.* {
+       char *p;
+       for (p = yytext; !isalpha(p[0]); p++); /* skip "  #   " */
+       p += 5; /* skip "error" */
+       glcpp_error(yylloc, yyextra, "#error%s", p);
+}
+
 {HASH}define{HSPACE}+/{IDENTIFIER}"(" {
        yyextra->space_tokens = 0;
        return HASH_DEFINE_FUNC;