/^#undef HAVE_DECL_GETENV/s/^.*$/#define HAVE_DECL_GETENV 1/
/^#undef SYS_SIGLIST_DECLARED/s/^.*$/#define SYS_SIGLIST_DECLARED 1/
/^#undef HAVE_DIRENT_H/s/^.*$/#define HAVE_DIRENT_H 1/
/^#undef HAVE_DECL_GETENV/s/^.*$/#define HAVE_DECL_GETENV 1/
/^#undef SYS_SIGLIST_DECLARED/s/^.*$/#define SYS_SIGLIST_DECLARED 1/
/^#undef HAVE_DIRENT_H/s/^.*$/#define HAVE_DIRENT_H 1/