PKG_CHECK_MODULES(INI_CONFIG, [ ini_config >= 1.0.0], [ AC_DEFINE_UNQUOTED(HAVE_LIBINI_CONFIG_V1, 1, [libini_config version greater than 1.0.0]) ], [ AC_MSG_WARN([libini_config-devel >= 1.0.0 not available, trying older version]) PKG_CHECK_MODULES(INI_CONFIG, [ ini_config >= 0.6.1], [ AC_DEFINE_UNQUOTED(HAVE_LIBINI_CONFIG_V0, 1, [libini_config version lesser than 1.0.0]) ], [ AC_MSG_ERROR([Please install libini_config-devel]) ] ) ] ) AC_SUBST(INI_CONFIG_OBJ) AC_SUBST(INI_CONFIG_CFLAGS) AC_SUBST(INI_CONFIG_LIBS)