$ libgnutls-extra-config --version Package gnutls-extra was not found in the pkg-config search path. Perhaps you should add the directory containing `gnutls-extra.pc' to the PKG_CONFIG_PATH environment variable No package 'gnutls-extra' found Package gnutls-extra was not found in the pkg-config search path. Perhaps you should add the directory containing `gnutls-extra.pc' to the PKG_CONFIG_PATH environment variable No package 'gnutls-extra' found Package gnutls-extra was not found in the pkg-config search path. Perhaps you should add the directory containing `gnutls-extra.pc' to the PKG_CONFIG_PATH environment variable No package 'gnutls-extra' found