glcpp-lex: Declare some generated functions to eliminate compiler warnings.
It's really a bug in flex that these functions are generated with neither
a declaration nor the 'static' keyword, but we can at least avoid the
warnings this way.
diff --git a/src/glsl/glcpp/glcpp-lex.l b/src/glsl/glcpp/glcpp-lex.l
index 6773832..29b2769 100644
--- a/src/glsl/glcpp/glcpp-lex.l
+++ b/src/glsl/glcpp/glcpp-lex.l
@@ -29,6 +29,11 @@
#include "glcpp.h"
#include "glcpp-parse.h"
+/* Flex annoyingly generates some functions without making them
+ * static. Let's declare them here. */
+int glcpp_get_column (yyscan_t yyscanner);
+void glcpp_set_column (int column_no , yyscan_t yyscanner);
+
#define YY_USER_ACTION \
do { \
yylloc->source = 0; \