mesa: put extern "C" in src/mesa/program/*h header files

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

src/mesa/program/prog_cache.h

@@ -32,6 +32,12 @@
 
 #include "main/glheader.h"
 
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 struct gl_context;
 
 /** Opaque type */
@@ -65,4 +71,9 @@ _mesa_shader_cache_insert(struct gl_context *ctx,
 			  struct gl_shader_program *program);
 
 
+#ifdef __cplusplus
+}
+#endif
+
+
 #endif /* PROG_CACHE_H */

src/mesa/program/prog_optimize.h

@@ -29,6 +29,11 @@
 #include "main/glheader.h"
 
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 struct gl_context;
 struct gl_program;
 struct prog_instruction;
@@ -46,4 +51,10 @@ _mesa_optimize_program(struct gl_context *ctx, struct gl_program *program);
 extern GLboolean
 _mesa_constant_fold(struct gl_program *prog);
 
+
+#ifdef __cplusplus
+}
+#endif
+
+
 #endif

src/mesa/program/prog_print.h

@@ -31,6 +31,12 @@
 #include "main/glheader.h"
 #include "main/mtypes.h"
 
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 struct gl_program;
 struct gl_program_parameter_list;
 struct gl_shader;
@@ -115,4 +121,9 @@ extern void
 _mesa_append_uniforms_to_file(const struct gl_shader *shader);
 
 
+#ifdef __cplusplus
+}
+#endif
+
+
 #endif /* PROG_PRINT_H */

src/mesa/program/programopt.h

@@ -28,6 +28,12 @@
 
 #include "main/mtypes.h"
 
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 extern void
 _mesa_insert_mvp_code(struct gl_context *ctx, struct gl_vertex_program *vprog);
 
@@ -52,4 +58,8 @@ extern void
 _mesa_nop_vertex_program(struct gl_context *ctx, struct gl_vertex_program *prog);
 
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PROGRAMOPT_H */