commit 769958ee75fd25712431541f844f467529257460
Author: Maxim Levitsky <maximlevitsky@gmail.com>
Date:   Wed Aug 15 01:01:37 2012 +0300

    state_tracker: allow to utilize GLSL workaround for broken apps in Gallium
    
    Currently Gallium has no way to activate the
    'force_glsl_extensions_warn' workaround that allows
    buggy apps that use GLSL extensions without asking for them to work.
    
    Since gallium mesa state tracker is essentially split into two,
    (dri (src/gallium/state_trackers/dri) and mesa (src/mesa/state_tracker))
    and only former has access to driconf options while later knows nothing
    about dri, I added this support by reading an environment variable.
    
    export force_glsl_extensions_warn=true
    
    Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>

diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 19d9da1..666addb 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -111,6 +111,13 @@ st_get_msaa(void)
    return 0;
 }
 
+bool
+st_get_glsl_warn(void)
+{
+   const char *env = _mesa_getenv("force_glsl_extensions_warn");
+   return env && !strcmp(env, "true");
+}
+
 
 static void st_init_vbuf(struct st_context *st)
 {
@@ -196,6 +203,8 @@ st_create_context_priv( struct gl_context *ctx, struct pipe_context *pipe )
 
    st->force_msaa = st_get_msaa();
 
+   st->ctx->Const.ForceGLSLExtensionsWarn = st_get_glsl_warn();
+
    /* GL limits and extensions */
    st_init_limits(st);
    st_init_extensions(st);
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 3ec98ad..40838f8 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -277,6 +277,9 @@ st_fb_orientation(const struct gl_framebuffer *fb)
 extern int
 st_get_msaa(void);
 
+extern bool
+st_get_glsl_warn(void);
+
 extern struct st_context *
 st_create_context(gl_api api, struct pipe_context *pipe,
                   const struct gl_config *visual,