- adds several config-options to allow for turning off certain features

  like
  o UCLIBC_HAS_GNU_ERROR
  o UCLIBC_HAS_BSD_ERR
  o UCLIBC_HAS_PTY
  o UCLIBC_HAS_GETPT (1)
  o UCLIBC_SYSCALL_STUBS
  o UCLIBC_SYSCALL_STUB_WARNING
  o UCLIBC_LINUX_SPECIFIC (2)
  o UCLIBC_BSD_SPECIFIC (3)
  o UCLIBC_NTP_LEGACY (4)
  o UCLIBC_SV4_DEPRECATED (5)
  o UCLIBC_HAVE_REALTIME (6)
  o UCLIBC_HAVE_ADVANCED_REALTIME (7)
  o UCLIBC_HAVE_EPOLL (8)
  o UCLIBC_HAVE_XATTR (9)
  o UCLIBC_HAVE_PROFILING (10)

(1) make non-standard getpt optional and implement standard posix_openpt
(2) fstatfs(), inotify_*(), ioperm(), iopl(), madvise(), modify_ldt(),
    personality()
    ppoll(), setresuid()
(3) mincore(), getdomainname(), setdomainname()
(4) ntp_adjtime(), ntp_gettime() aliases
(5) ustat() [use statfs(2) in your code instead]
(6) All marked as "(REALTIME)" in SUSv3
(7) All marked as "(ADVANCED REALTIME)" in SUSv3
(8) epoll_create(), epoll_ctl(), epoll_wait()
(9) all Extended Attributes
(10) helpers for gcc's -finstrument-functions

- Fixes _dl_exit()
- Implements sleep(3) for !UCLIBC_HAVE_REALTIME
- Implements usleep(3) for !UCLIBC_HAVE_REALTIME
- adds #warning about incorrect posix_fadvise{,64}()
- removes unused and unwanted uselib()

Net outcome is that an allnoconfig with HAVE_SHARED is now about 88k instead 
of formerly 130k.

2 files changed, 19 insertions, 4 deletions

diff --git a/libc/misc/statfs/fstatvfs.c b/libc/misc/statfs/fstatvfs.c
index bc00cc6b5..231d45207 100644
--- a/libc/misc/statfs/fstatvfs.c
+++ b/libc/misc/statfs/fstatvfs.c
@@ -34,7 +34,21 @@ libc_hidden_proto(setmntent)
 libc_hidden_proto(getmntent_r)
 libc_hidden_proto(endmntent)
 
-libc_hidden_proto(fstatfs)
+#if !defined __UCLIBC_LINUX_SPECIFIC__
+#ifndef __USE_FILE_OFFSET64
+extern int fstatfs (int __fildes, struct statfs *__buf)
+     __THROW __nonnull ((2));
+#else
+# ifdef __REDIRECT_NTH
+extern int __REDIRECT_NTH (fstatfs, (int __fildes, struct statfs *__buf),
+			   fstatfs64) __nonnull ((2));
+# else
+#  define fstatfs fstatfs64
+# endif
+#endif
+#endif
+extern __typeof(fstatfs) __libc_fstatfs;
+libc_hidden_proto(__libc_fstatfs)
 libc_hidden_proto(fstat)
 libc_hidden_proto(stat)
 
@@ -44,7 +58,7 @@ int fstatvfs (int fd, struct statvfs *buf)
     struct stat st;
 
     /* Get as much information as possible from the system.  */
-    if (fstatfs (fd, &fsbuf) < 0)
+    if (__libc_fstatfs (fd, &fsbuf) < 0)
 	return -1;
 
 #define STAT(st) fstat (fd, st)
diff --git a/libc/misc/statfs/statvfs.c b/libc/misc/statfs/statvfs.c
index 077a2fb0b..0feb8731d 100644
--- a/libc/misc/statfs/statvfs.c
+++ b/libc/misc/statfs/statvfs.c
@@ -34,7 +34,8 @@ libc_hidden_proto(setmntent)
 libc_hidden_proto(getmntent_r)
 libc_hidden_proto(endmntent)
 
-libc_hidden_proto(statfs)
+extern __typeof(statfs) __libc_statfs;
+libc_hidden_proto(__libc_statfs)
 libc_hidden_proto(stat)
 
 int statvfs (const char *file, struct statvfs *buf)
@@ -43,7 +44,7 @@ int statvfs (const char *file, struct statvfs *buf)
     struct stat st;
 
     /* Get as much information as possible from the system.  */
-    if (statfs (file, &fsbuf) < 0)
+    if (__libc_statfs (file, &fsbuf) < 0)
 	return -1;
 
 #define STAT(st) stat (file, st)