profile: Adds a --enable-profile option

This adds a --enable-profile option which enables uprof based profiling.
It was also necessary to fixup a CLUTTER_ENABLE_PROFILING #ifdef in
cogl-context.c to renamed COGL_ENABLE_PROFILING instead. By default Cogl
doesn't output uprof reports directly, instead it assumes a higher level
toolkit will output a report. If you want a report from Cogl you can
export COGL_PROFILE_OUTPUT_REPORT=1 before running your app.

The latest version of uprof can be fetched from:
git://github.com/rib/UProf.git

cogl/Makefile.am

@@ -379,7 +379,7 @@ libcogl_la_LDFLAGS = \
 	-no-undefined \
 	-version-info @COGL_LT_CURRENT@:@COGL_LT_REVISION@:@COGL_LT_AGE@ \
 	-export-dynamic \
-	-export-symbols-regex "^(cogl|_cogl_debug_flags|_cogl_atlas_new|_cogl_atlas_add_reorganize_callback|_cogl_atlas_reserve_space|_cogl_callback|_cogl_util_get_eye_planes_for_screen_poly|_cogl_atlas_texture_remove_reorganize_callback|_cogl_atlas_texture_add_reorganize_callback|_cogl_texture_foreach_sub_texture_in_region|_cogl_atlas_texture_new_with_size).*"
+	-export-symbols-regex "^(cogl|_cogl_debug_flags|_cogl_atlas_new|_cogl_atlas_add_reorganize_callback|_cogl_atlas_reserve_space|_cogl_callback|_cogl_util_get_eye_planes_for_screen_poly|_cogl_atlas_texture_remove_reorganize_callback|_cogl_atlas_texture_add_reorganize_callback|_cogl_texture_foreach_sub_texture_in_region|_cogl_atlas_texture_new_with_size|_cogl_profile_trace_message).*"
 
 libcogl_la_SOURCES = $(cogl_sources_c)
 nodist_libcogl_la_SOURCES = $(BUILT_SOURCES)

cogl/cogl-context.c

@@ -111,7 +111,7 @@ cogl_context_new (CoglDisplay *display,
   const CoglWinsysVtable *winsys;
   int i;
 
-#ifdef CLUTTER_ENABLE_PROFILE
+#ifdef COGL_ENABLE_PROFILE
   /* We need to be absolutely sure that uprof has been initialized
    * before calling _cogl_uprof_init. uprof_init (NULL, NULL)
    * will be a NOP if it has been initialized but it will also

configure.ac

@@ -209,6 +209,29 @@ AS_IF([test "x$enable_cairo" = "xyes" && test "x$enable_debug" = "xyes"],
       ])
 
 
+dnl     ============================================================
+dnl     Enable profiling
+dnl     ============================================================
+AC_ARG_ENABLE(profile,
+              AC_HELP_STRING([--enable-uprof=@<:@no/yes@:>@],
+                             [Turn on uprof profiling support. yes; All UProf profiling probe points are compiled in and may be runtime enabled. no; No profiling support will built into cogl.  @<:@default=no@:>@]),
+              [],
+              [enable_profile=no])
+AS_IF([test "x$enable_profile" = "xyes"],
+      [
+        AS_IF([test "x$GCC" = "xyes"],
+              [
+                COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES uprof-0.3"
+                COGL_EXTRA_CFLAGS="$COGL_EXTRA_CFLAGS -DCOGL_ENABLE_PROFILE"
+                AS_IF([test "x$enable_debug" = "xyes"], [COGL_EXTRA_CFLAGS="$COGL_EXTRA_CFLAGS -DUPROF_DEBUG"])
+              ],
+              [
+                AC_MSG_ERROR([--enable-profile is currently only supported if using GCC])
+              ])
+      ])
+AM_CONDITIONAL(PROFILE, test "x$enable_profile" != "xno")
+
+
 dnl     ============================================================
 dnl     Enable strict compiler flags
 dnl     ============================================================
@@ -895,6 +918,7 @@ echo "        Wayland compositor support: ${enable_wayland_egl_server}"
 fi
 echo "        Image backend: ${COGL_IMAGE_BACKEND}"
 echo "        Cogl Pango: ${enable_cogl_pango}"
+echo "        Profiling: ${enable_profile}"
 
 # Compiler/Debug related flags
 echo ""