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-rw-r--r--src/glsl/glcpp/glcpp-parse.y2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/glsl/glcpp/glcpp-parse.y b/src/glsl/glcpp/glcpp-parse.y
index 76dcd42290c..8fba923a2cb 100644
--- a/src/glsl/glcpp/glcpp-parse.y
+++ b/src/glsl/glcpp/glcpp-parse.y
@@ -363,6 +363,8 @@ integer_constant:
expression:
integer_constant
| IDENTIFIER {
+ if (parser->is_gles)
+ glcpp_error(& @1, parser, "undefined macro %s in expression (illegal in GLES)", $1);
$$ = 0;
}
| expression OR expression {