CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY make[3]: warning: jobserver unavailable: using -j1. Add '+' to parent make rule. In file included from /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d/source_subfolder/common/strutils.cpp:4: In file included from /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d/source_subfolder/common/strutils.h:6: /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d/source_subfolder/common/aloptional.h:38:5: error: exception specification of explicitly defaulted default constructor does not match the calculated one optional() noexcept = default; ^ /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d/source_subfolder/common/strutils.cpp:46:27: note: in instantiation of template class 'al::optional >' requested here al::optional getenv(const char *envname) ^ 1 error generated. make[2]: *** [source_subfolder/CMakeFiles/OpenAL.dir/build.make:162: source_subfolder/CMakeFiles/OpenAL.dir/common/strutils.cpp.o] Error 1 make[2]: *** Waiting for unfinished jobs.... make[1]: *** [CMakeFiles/Makefile2:151: source_subfolder/CMakeFiles/OpenAL.dir/all] Error 2 make: *** [Makefile:130: all] Error 2 openal/1.20.1: WARN: Build folder is dirty, removing it: /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d openal/1.20.1: ERROR: Package '0cf8c89d093bb1e21572dff07c54e70bfcdff06d' build failed openal/1.20.1: WARN: Build folder /home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d ERROR: openal/1.20.1: Error in build() method, line 89 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3658/.conan/data/openal/1.20.1/_/_/build/0cf8c89d093bb1e21572dff07c54e70bfcdff06d/build_subfolder' '--' '-j3'