From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 13 Mar 2021 13:56:19 +0000 (+0200)
Subject: Don't require builtin inputs to be linked
X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=commitdiff_plain;h=6cb4cc995865935d22b276801c218d2dcf49cebd

Don't require builtin inputs to be linked

Many of them provide access to external values from the API.
---

diff --git a/source/glsl/validate.cpp b/source/glsl/validate.cpp
index 6e90698c..13cb5ccb 100644
--- a/source/glsl/validate.cpp
+++ b/source/glsl/validate.cpp
@@ -216,7 +216,7 @@ void ReferenceValidator::visit(VariableReference &var)
 {
 	if(!var.declaration)
 		error(var, format("Use of undeclared variable '%s'", var.name));
-	else if(stage->type!=Stage::VERTEX && var.declaration->interface=="in" && !var.declaration->linked_declaration)
+	else if(stage->type!=Stage::VERTEX && var.declaration->interface=="in" && var.name.compare(0, 3, "gl_") && !var.declaration->linked_declaration)
 		error(var, format("Use of unlinked input variable '%s'", var.name));
 }