Add aom_usage_exit OBJECT library for usage_exit.c

This removes usage_exit.c from the sources of the test_libaom and
test_intra_pred_speed executable targets so that the sources of those
two targets are all C++ files.

Change-Id: I838c08a88e17371df4458278c42d8e67419ba147

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b975ec..00a7e2b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -374,6 +374,7 @@
 #
 if(ENABLE_EXAMPLES OR ENABLE_TESTS OR ENABLE_TOOLS)
   add_library(aom_common_app_util OBJECT ${AOM_COMMON_APP_UTIL_SOURCES})
+  add_library(aom_usage_exit OBJECT "${AOM_GEN_SRC_DIR}/usage_exit.c")
   set_property(TARGET ${example} PROPERTY FOLDER examples)
   if(CONFIG_AV1_DECODER)
     add_library(aom_decoder_app_util OBJECT ${AOM_DECODER_APP_UTIL_SOURCES})
@@ -508,10 +509,10 @@
       # aom_entropy_optimizer.c won't work on macos, but dragging in all the
       # helper machinery allows the link to succeed.
       add_executable(aom_entropy_optimizer
-                     "${AOM_GEN_SRC_DIR}/usage_exit.c"
                      "${AOM_ROOT}/tools/aom_entropy_optimizer.c"
                      $<TARGET_OBJECTS:aom_common_app_util>
-                     $<TARGET_OBJECTS:aom_encoder_app_util>)
+                     $<TARGET_OBJECTS:aom_encoder_app_util>
+                     $<TARGET_OBJECTS:aom_usage_exit>)
 
       # Maintain a list of encoder tool targets.
       list(APPEND AOM_ENCODER_TOOL_TARGETS aom_entropy_optimizer)
@@ -661,12 +662,12 @@
 
 if(ENABLE_TOOLS)
   if(CONFIG_AV1_DECODER)
-    add_executable(dump_obu "${AOM_GEN_SRC_DIR}/usage_exit.c"
-                            "${AOM_ROOT}/tools/dump_obu.cc"
+    add_executable(dump_obu "${AOM_ROOT}/tools/dump_obu.cc"
                             "${AOM_ROOT}/tools/obu_parser.cc"
                             "${AOM_ROOT}/tools/obu_parser.h"
                             $<TARGET_OBJECTS:aom_common_app_util>
-                            $<TARGET_OBJECTS:aom_decoder_app_util>)
+                            $<TARGET_OBJECTS:aom_decoder_app_util>
+                            $<TARGET_OBJECTS:aom_usage_exit>)
 
     list(APPEND AOM_TOOL_TARGETS dump_obu)
     list(APPEND AOM_APP_TARGETS dump_obu)

test/test.cmake

diff --git a/test/test.cmake b/test/test.cmake
index a11f758..e2f5da5 100644
--- a/test/test.cmake
+++ b/test/test.cmake
@@ -28,8 +28,7 @@
   set(AOM_TEST_SOURCE_VARS "${AOM_TEST_SOURCE_VARS}" PARENT_SCOPE)
 endfunction()
 
-list(APPEND AOM_UNIT_TEST_WRAPPER_SOURCES "${AOM_GEN_SRC_DIR}/usage_exit.c"
-            "${AOM_ROOT}/test/test_libaom.cc")
+list(APPEND AOM_UNIT_TEST_WRAPPER_SOURCES "${AOM_ROOT}/test/test_libaom.cc")
 add_to_libaom_test_srcs(AOM_UNIT_TEST_WRAPPER_SOURCES)
 
 list(APPEND AOM_UNIT_TEST_COMMON_SOURCES
@@ -102,7 +101,7 @@
 list(APPEND AOM_ENCODE_PERF_TEST_SOURCES "${AOM_ROOT}/test/encode_perf_test.cc")
 list(APPEND AOM_UNIT_TEST_WEBM_SOURCES "${AOM_ROOT}/test/webm_video_source.h")
 add_to_libaom_test_srcs(AOM_UNIT_TEST_WEBM_SOURCES)
-list(APPEND AOM_TEST_INTRA_PRED_SPEED_SOURCES "${AOM_GEN_SRC_DIR}/usage_exit.c"
+list(APPEND AOM_TEST_INTRA_PRED_SPEED_SOURCES
             "${AOM_ROOT}/test/test_intra_pred_speed.cc")
 
 if(CONFIG_AV1_DECODER)
@@ -462,6 +461,7 @@
 
   add_executable(test_libaom ${AOM_UNIT_TEST_WRAPPER_SOURCES}
                              $<TARGET_OBJECTS:aom_common_app_util>
+                             $<TARGET_OBJECTS:aom_usage_exit>
                              $<TARGET_OBJECTS:test_aom_common>)
   set_property(TARGET test_libaom PROPERTY FOLDER ${AOM_IDE_TEST_FOLDER})
   list(APPEND AOM_APP_TARGETS test_libaom)
@@ -484,9 +484,9 @@
     endif()
 
     if(NOT BUILD_SHARED_LIBS)
-      add_executable(test_intra_pred_speed
-                     ${AOM_TEST_INTRA_PRED_SPEED_SOURCES}
-                     $<TARGET_OBJECTS:aom_common_app_util>)
+      add_executable(test_intra_pred_speed ${AOM_TEST_INTRA_PRED_SPEED_SOURCES}
+                                           $<TARGET_OBJECTS:aom_common_app_util>
+                                           $<TARGET_OBJECTS:aom_usage_exit>)
       set_property(TARGET test_intra_pred_speed
                    PROPERTY FOLDER ${AOM_IDE_TEST_FOLDER})
       target_link_libraries(test_intra_pred_speed ${AOM_LIB_LINK_TYPE} aom