Chrome Version: (copy from chrome://version)
OS: (e.g. Win10, MacOS 10.12, etc...)

What steps will reproduce the problem?
(1) USE="-cras-apm" emerge-${BOARD} adhd

What is the expected result? success

What happens instead? build fails with:


x86_64-cros-linux-gnu-clang++ -DPACKAGE_NAME=\"cras\" -DPACKAGE_TARNAME=\"cras\" -DPACKAGE_VERSION=\"0.1\" -DPACKAGE_STRING=\"cras\ 0.1\" -DPACKAGE_BUGREPORT=\"dgreid@chromium.org\" -DPACKAGE_URL=\"http://www.chromium.org/\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE_LIBASOUND=1 -DALSA_PLUGIN_DIR=\"/usr/lib64/alsa-lib\" -DCRAS_CONFIG_FILE_DIR=\"/etc/cras\" -DCRAS_SOCKET_FILE_DIR=\"/run/cras\" -DHAVE_SSE42=1 -DHAVE_AVX=1 -DHAVE_AVX2=1 -DHAVE_FMA=1 -I.  -O2 -Wall -Werror -Wno-error=cpp -I../src/common -I../src/server -DVCSID='"0.0.1-r1528-65207dc91ec9f81f6e975bb559270c9ccfe77031"'  -O2 -pipe -O2 -pipe -O2 -pipe -march=corei7 -g -fno-exceptions -fno-unwind-tables   -fno-asynchronous-unwind-tables  -c -o tests/fmt_conv_unittest-fmt_conv_unittest.o `test -f 'tests/fmt_conv_unittest.cc' || echo './'`tests/fmt_conv_unittest.cc
tests/audio_thread_unittest.cc:1111:10: error: functions that differ only in their return type cannot be overloaded
uint64_t cras_apm_list_get_effects(struct cras_apm_list *list)
~~~~~~~~ ^
../src/server/cras_apm_list.h:143:28: note: previous definition is here
static inline unsigned int cras_apm_list_get_effects(struct cras_apm_list *list)
              ~~~~~~~~~~~~ ^
tests/audio_thread_unittest.cc:1120:6: error: redefinition of 'cras_apm_list_set_aec_dump'
void cras_apm_list_set_aec_dump(struct cras_apm_list *list,
     ^
../src/server/cras_apm_list.h:174:20: note: previous definition is here
static inline void cras_apm_list_set_aec_dump(struct cras_apm_list *list,
                   ^
2 errors generated.
make[2]: *** [Makefile:6935: tests/audio_thread_unittest-audio_thread_unittest.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '/build/fizz-accelerator/tmp/portage/media-sound/adhd-0.0.1-r1528/work/adhd-0.0.1/cras/src'
make[1]: *** [Makefile:8364: check-am] Error 2
make[1]: Leaving directory '/build/fizz-accelerator/tmp/portage/media-sound/adhd-0.0.1-r1528/work/adhd-0.0.1/cras/src'
make: *** [Makefile:457: check-recursive] Error 1


Marking P2 as we can fix it in our board overlay with a package use, but it seems silly to have a use flag that doesn't work.