glcpp: Print to the main compiler's infolog, not stdout.

glcpp/pp.c

@@ -57,7 +57,7 @@ glcpp_warning (YYLTYPE *locp, glcpp_parser_t *parser, const char *fmt, ...)
 }
 
 extern int
-preprocess(void *talloc_ctx, const char **shader)
+preprocess(void *talloc_ctx, const char **shader, char **info_log)
 {
 	int errors;
 	glcpp_parser_t *parser = glcpp_parser_create ();
@@ -65,7 +65,7 @@ preprocess(void *talloc_ctx, const char **shader)
 
 	glcpp_parser_parse (parser);
 
-	printf("%s", parser->info_log);
+	*info_log = talloc_strdup_append(*info_log, parser->info_log);
 
 	talloc_steal(talloc_ctx, parser->output);
 	*shader = parser->output;

glsl_parser_extras.h

@@ -102,7 +102,7 @@ extern void _mesa_glsl_warning(const YYLTYPE *locp,
 			       const char *fmt, ...);
 
 extern "C" {
-extern int preprocess(void *ctx, const char **shader);
+extern int preprocess(void *ctx, const char **shader, char **info_log);
 }
 
 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,

main.cpp

@@ -128,7 +128,7 @@ compile_shader(struct glsl_shader *shader)
     * should probably be the parser context, but there isn't one yet.
    */
    const char *source = shader->Source;
-   state.error = preprocess(shader, &source);
+   state.error = preprocess(shader, &source, &state.info_log);
 
    if (!state.error) {
       _mesa_glsl_lexer_ctor(& state, source);