******************************************************************************** conan test conan-center-index/recipes/docgen/all/test_package/conanfile.py docgen/1.0.0@ --profile=/home/conan/w/BuildSingleReference/12111/04e9faa8-7298-4071-a21b-92e0bcaf7fda/profile.txt ******************************************************************************** Configuration: [settings] arch=x86_64 arch_build=x86_64 build_type=Release compiler=gcc compiler.libcxx=libstdc++ compiler.version=4.9 os=Linux os_build=Linux [options] [build_requires] [env] doxygen/1.9.1: Not found in local cache, looking in remotes... doxygen/1.9.1: Trying with 'conan-center'... Downloading conanmanifest.txt Downloading conanfile.py Downloading conan_export.tgz doxygen/1.9.1: Downloaded recipe revision bfdffa9bc881132aff853a659d8bf62a ERROR: doxygen/1.9.1: Invalid configuration: Compiler version too old. At least 5 is required.