CMake Warning: Manually-specified variables were not used by the project: ALSOFT_TESTS CMAKE_EXPORT_NO_PACKAGE_REGISTRY In file included from /home/conan/w/cci_PR-3658/.conan/data/openal/1.21.0/_/_/build/7f95659638c31551813be74e6bc2f431b3bb89cd/source_subfolder/alc/backends/alsa.cpp:54: In file included from /home/conan/w/cci_PR-3658/.conan/data/libalsa/1.2.4/_/_/package/1ac362637feb4520484adf491ece8890d4b0da1a/include/alsa/asoundlib.h:54: /home/conan/w/cci_PR-3658/.conan/data/libalsa/1.2.4/_/_/package/1ac362637feb4520484adf491ece8890d4b0da1a/include/alsa/pcm.h:610:19: warning: zero size arrays are an extension [-Wzero-length-array] unsigned int pos[0]; /**< channel position array */ ^ /home/conan/w/cci_PR-3658/.conan/data/openal/1.21.0/_/_/build/7f95659638c31551813be74e6bc2f431b3bb89cd/source_subfolder/alc/backends/alsa.cpp:385:12: warning: enumeration value 'SND_PCM_STATE_PRIVATE1' not handled in switch [-Wswitch] switch(state) ^ 2 warnings generated. CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY openal/1.21.0: WARN: Unknown compiler. Assuming your compiler supports c++11