glsl: Add error message for intrastage interface block mismatch.

Previously we failed to link (which is correct), but we did not output
an error message, which could have been confusing for users.

Reviewed-by: Jordan Justen <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/glsl/link_interface_blocks.cpp b/src/glsl/link_interface_blocks.cpp
index b91860d0394..4f67291d85f 100644
--- a/src/glsl/link_interface_blocks.cpp
+++ b/src/glsl/link_interface_blocks.cpp
@@ -32,7 +32,8 @@
 #include "main/macros.h"
 
 bool
-validate_intrastage_interface_blocks(const gl_shader **shader_list,
+validate_intrastage_interface_blocks(struct gl_shader_program *prog,
+                                     const gl_shader **shader_list,
                                      unsigned num_shaders)
 {
    glsl_symbol_table interfaces;
@@ -62,6 +63,8 @@ validate_intrastage_interface_blocks(const gl_shader **shader_list,
             interfaces.add_interface(iface_type->name, iface_type,
                                      (enum ir_variable_mode) var->mode);
          } else if (old_iface_type != iface_type) {
+            linker_error(prog, "definitions of interface block `%s' do not"
+                         " match\n", iface_type->name);
             return false;
          }
       }