Move aom_util cmake commands to aom_util/aom_util.cmake.

Also adds CONFIG_BITSTREAM_DEBUG support (because it was in
aom_util/aom_util.mk, and that's partly the guidance here).

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I971b4025e345fd7d6d766526059f74d8b6ff2ebd

CMakeLists.txt

@@ -20,6 +20,7 @@ include("${AOM_ROOT}/aom_dsp/aom_dsp.cmake")
 include("${AOM_ROOT}/aom_mem/aom_mem.cmake")
 include("${AOM_ROOT}/aom_ports/aom_ports.cmake")
 include("${AOM_ROOT}/aom_scale/aom_scale.cmake")
+include("${AOM_ROOT}/aom_util/aom_util.cmake")
 include("${AOM_ROOT}/av1/av1.cmake")
 include("${AOM_ROOT}/test/test.cmake")
 
@@ -99,11 +100,6 @@ set(AOM_SOURCES
     "${AOM_ROOT}/aom/src/aom_encoder.c"
     "${AOM_ROOT}/aom/src/aom_image.c")
 
-set(AOM_UTIL_SOURCES
-    "${AOM_ROOT}/aom_util/aom_thread.c"
-    "${AOM_ROOT}/aom_util/aom_thread.h"
-    "${AOM_ROOT}/aom_util/endian_inl.h")
-
 set(AOM_COMMON_APP_UTIL_SOURCES
     "${AOM_ROOT}/args.c"
     "${AOM_ROOT}/args.h"
@@ -164,21 +160,18 @@ add_rtcd_build_step("${AOM_ROOT}/av1/common/av1_rtcd_defs.pl"
                     "av1_rtcd")
 
 add_library(aom_rtcd OBJECT ${AOM_RTCD_SOURCES})
-add_library(aom_util OBJECT ${AOM_UTIL_SOURCES})
 add_library(aom_encoder_stats OBJECT ${AOM_ENCODER_STATS_SOURCES})
-add_library(aom
-            ${AOM_SOURCES}
-            $<TARGET_OBJECTS:aom_rtcd>
-            $<TARGET_OBJECTS:aom_util>)
+add_library(aom ${AOM_SOURCES} $<TARGET_OBJECTS:aom_rtcd>)
 
 # List of object and static library targets.
-set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} aom_rtcd aom_util aom_encoder_stats
-    aom_mem aom_scale aom)
+set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} aom_rtcd aom_encoder_stats aom_mem
+    aom_scale aom)
 
 # Setup dependencies.
 setup_aom_dsp_targets()
 setup_aom_mem_targets()
 setup_aom_ports_targets()
+setup_aom_util_targets()
 setup_aom_scale_targets()
 setup_av1_targets()
 

aom_util/aom_util.cmake

@@ -0,0 +1,29 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+set(AOM_UTIL_SOURCES
+    "${AOM_ROOT}/aom_util/aom_thread.c"
+    "${AOM_ROOT}/aom_util/aom_thread.h"
+    "${AOM_ROOT}/aom_util/endian_inl.h")
+
+if (CONFIG_BITSTREAM_DEBUG)
+  set(AOM_UTIL_SOURCES
+      ${AOM_UTIL_SOURCES}
+      "${AOM_ROOT}/aom_util/debug_util.c"
+      "${AOM_ROOT}/aom_util/debug_util.h")
+endif ()
+
+# Creates the aom_util build target and makes libaom depend on it. The libaom
+# target must exist before this function is called.
+function (setup_aom_util_targets)
+  add_library(aom_util OBJECT ${AOM_UTIL_SOURCES})
+  set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} aom_util PARENT_SCOPE)
+  target_sources(aom PUBLIC $<TARGET_OBJECTS:aom_util>)
+endfunction ()