Document new tristate __libc_missing_32bit_uids.

Use 32bit uid syscall if __libc_missing_32bit_uids is -1 or 0.

diff --git a/sysdeps/unix/sysv/linux/m68k/chown.c b/sysdeps/unix/sysv/linux/m68k/chown.c
index 4e7625c13e8b78ddbb43942c1117b1f4695c641d..79701ee6ff8845f592bc4e07891cf1099a249f8e 100644 (file)
--- a/sysdeps/unix/sysv/linux/m68k/chown.c
+++ b/sysdeps/unix/sysv/linux/m68k/chown.c
@@ -45,7 +45,7 @@ __chown (const char *file, uid_t owner, gid_t group)
   return INLINE_SYSCALL (chown32, 3, file, owner, group);
 #else
 # ifdef __NR_chown32
-  if (!__libc_missing_32bit_uids)
+  if (__libc_missing_32bit_uids <= 0)
     {
       int result;
       int saved_errno = errno;