int
euidaccess (const char *file, int mode)
{
-#if HAVE_FACCESSAT
+#if HAVE_FACCESSAT /* glibc */
return faccessat (AT_FDCWD, file, mode, AT_EACCESS);
-#elif defined EFF_ONLY_OK
+#elif defined EFF_ONLY_OK /* IRIX, OSF/1, Interix */
return access (file, mode | EFF_ONLY_OK);
-#elif defined ACC_SELF
+#elif defined ACC_SELF /* AIX */
return accessx (file, mode, ACC_SELF);
-#elif HAVE_EACCESS
+#elif HAVE_EACCESS /* FreeBSD */
return eaccess (file, mode);
-#else
+#else /* MacOS X, NetBSD, OpenBSD, HP-UX, Solaris, Cygwin, mingw, BeOS */
uid_t uid = getuid ();
gid_t gid = getgid ();