linker: Link built-in functions instead of including them in every shader

This is an invasive set of changes.  Each user shader tracks a set of other
shaders that contain built-in functions.  During compilation, function
prototypes are imported from these shaders.  During linking, the
shaders are linked with these built-in-function shaders just like with
any other shader.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/glsl/glsl_parser_extras.h b/src/glsl/glsl_parser_extras.h
index b50d9eea67..56f6e18e0b 100644
--- a/src/glsl/glsl_parser_extras.h
+++ b/src/glsl/glsl_parser_extras.h
@@ -125,6 +125,10 @@ struct _mesa_glsl_parse_state {
 
    /** Extensions supported by the OpenGL implementation. */
    const struct gl_extensions *extensions;
+
+   /** Shaders containing built-in functions that are used for linking. */
+   struct gl_shader *builtins_to_link[16];
+   unsigned num_builtins_to_link;
 };
 
 typedef struct YYLTYPE {