4 files changed, 27 insertions, 1 deletions
diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index 845a7938f91..1a00a900ef0 100644
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -2297,6 +2297,16 @@ link_intrastage_shaders(void *mem_ctx,
    if (ctx->Const.VertexID_is_zero_based)
       lower_vertex_id(linked);
 
+#ifdef DEBUG
+   /* Compute the source checksum. */
+   linked->SourceChecksum = 0;
+   for (unsigned i = 0; i < num_shaders; i++) {
+      if (shader_list[i] == NULL)
+         continue;
+      linked->SourceChecksum ^= shader_list[i]->SourceChecksum;
+   }
+#endif
+
    return linked;
 }
 
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 485f5f18f48..26b19653cb8 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2282,6 +2282,10 @@ struct gl_linked_shader
 {
    gl_shader_stage Stage;
 
+#ifdef DEBUG
+   unsigned SourceChecksum;
+#endif
+
    struct gl_program *Program;  /**< Post-compile assembly code */
 
    /**
@@ -2414,7 +2418,9 @@ struct gl_shader
    GLboolean CompileStatus;
    bool IsES;              /**< True if this shader uses GLSL ES */
 
-   GLuint SourceChecksum;       /**< for debug/logging purposes */
+#ifdef DEBUG
+   unsigned SourceChecksum;       /**< for debug/logging purposes */
+#endif
    const GLchar *Source;  /**< Source code string */
 
    GLchar *InfoLog;
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 9592857f0f2..83ee0d4ca7d 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -1149,10 +1149,16 @@ print_shader_info(const struct gl_shader_program *shProg)
 
    printf("Mesa: glUseProgram(%u)\n", shProg->Name);
    for (i = 0; i < shProg->NumShaders; i++) {
+#ifdef DEBUG
       printf("  %s shader %u, checksum %u\n",
              _mesa_shader_stage_to_string(shProg->Shaders[i]->Stage),
 	     shProg->Shaders[i]->Name,
 	     shProg->Shaders[i]->SourceChecksum);
+#else
+      printf("  %s shader %u\n",
+             _mesa_shader_stage_to_string(shProg->Shaders[i]->Stage),
+             shProg->Shaders[i]->Name);
+#endif
    }
    if (shProg->_LinkedShaders[MESA_SHADER_VERTEX])
       printf("  vert prog %u\n",
diff --git a/src/mesa/program/prog_print.c b/src/mesa/program/prog_print.c
index bdeb8fd6752..0a4bc51e954 100644
--- a/src/mesa/program/prog_print.c
+++ b/src/mesa/program/prog_print.c
@@ -976,7 +976,11 @@ _mesa_write_shader_to_file(const struct gl_shader *shader)
       return;
    }
 
+#ifdef DEBUG
    fprintf(f, "/* Shader %u source, checksum %u */\n", shader->Name, shader->SourceChecksum);
+#else
+   fprintf(f, "/* Shader %u source */\n", shader->Name);
+#endif
    fputs(shader->Source, f);
    fprintf(f, "\n");