diff -rU3 pkg-config-0.29.1/pkg.c pkg-config-0.29.1.new/pkg.c --- pkg-config-0.29.1/pkg.c 2016-02-26 17:56:52.000000000 +0100 +++ pkg-config-0.29.1.new/pkg.c 2016-12-29 14:35:51.940067584 +0100 @@ -808,6 +808,12 @@ system_directories = add_env_variable_to_list (system_directories, search_path); + search_path = g_getenv ("CPATH"); + if (search_path != NULL) + { + system_directories = add_env_variable_to_list (system_directories, search_path); + } + search_path = g_getenv ("C_INCLUDE_PATH"); if (search_path != NULL) {