gnu-config/20200712: WARN: This conanfile has no build step
[HOOK - conan-center.py] post_package(): ERROR: [MATCHING CONFIGURATION (KB-H014)] Package for Header Only does not contain artifacts with these extensions: ['h', 'h++', 'hh', 'hxx', 'hpp'] (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H014) 
[HOOK - conan-center.py] post_package(): ERROR: [MATCHING CONFIGURATION (KB-H014)] Packaged artifacts does not match the settings used: os=None, compiler=None (https://github.com/conan-io/conan-center-index/wiki/Error-Knowledge-Base#KB-H014) 
ERROR: [HOOK - conan-center.py] post_package(): Some checks failed running the hook, check the output