- 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.

8 files changed, 41 insertions, 11 deletions

diff --git a/libc/misc/dirent/Makefile.in b/libc/misc/dirent/Makefile.in
index 89a00ed5e..b35efa0b1 100644
--- a/libc/misc/dirent/Makefile.in
+++ b/libc/misc/dirent/Makefile.in
@@ -5,8 +5,8 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC :=	alphasort.c closedir.c dirfd.c opendir.c readdir.c rewinddir.c scandir.c \
-	seekdir.c telldir.c readdir_r.c
+CSRC :=	alphasort.c closedir.c dirfd.c opendir.c readdir.c rewinddir.c \
+	scandir.c seekdir.c telldir.c readdir_r.c
 
 ifeq ($(UCLIBC_HAS_LFS),y)
 CSRC +=	readdir64.c alphasort64.c scandir64.c readdir64_r.c
diff --git a/libc/misc/error/Makefile.in b/libc/misc/error/Makefile.in
index c529e955e..9facacff0 100644
--- a/libc/misc/error/Makefile.in
+++ b/libc/misc/error/Makefile.in
@@ -5,7 +5,13 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC := error.c err.c
+CSRC :=
+ifeq ($(UCLIBC_HAS_BSD_ERR),y)
+CSRC += err.c
+endif
+ifeq ($(UCLIBC_HAS_GNU_ERROR),y)
+CSRC += error.c
+endif
 
 MISC_ERROR_DIR := $(top_srcdir)libc/misc/error
 MISC_ERROR_OUT := $(top_builddir)libc/misc/error
diff --git a/libc/misc/error/err.c b/libc/misc/error/err.c
index cd331500a..ab9c8b72b 100644
--- a/libc/misc/error/err.c
+++ b/libc/misc/error/err.c
@@ -19,6 +19,8 @@
 #warning REMINDER: Deal with wide oriented stderr case.
 #endif
 
+#if defined __USE_BSD
+
 libc_hidden_proto(vwarn)
 libc_hidden_proto(vwarnx)
 libc_hidden_proto(verr)
@@ -124,3 +126,4 @@ void attribute_noreturn errx(int status, const char *format, ...)
 	while(1)
 		va_end(args);
 }
+#endif
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)
diff --git a/libc/misc/syslog/Makefile.in b/libc/misc/syslog/Makefile.in
index fd9ae198f..8355ac0cd 100644
--- a/libc/misc/syslog/Makefile.in
+++ b/libc/misc/syslog/Makefile.in
@@ -13,7 +13,9 @@ MISC_SYSLOG_OUT := $(top_builddir)libc/misc/syslog
 MISC_SYSLOG_SRC := $(patsubst %.c,$(MISC_SYSLOG_DIR)/%.c,$(CSRC))
 MISC_SYSLOG_OBJ := $(patsubst %.c,$(MISC_SYSLOG_OUT)/%.o,$(CSRC))
 
+ifeq ($(UCLIBC_HAS_SYSLOG),y)
 libc-y += $(MISC_SYSLOG_OBJ)
+endif
 
 objclean-y += misc_syslog_objclean
 
diff --git a/libc/misc/sysvipc/sem.c b/libc/misc/sysvipc/sem.c
index 51706c58d..07705c9d9 100644
--- a/libc/misc/sysvipc/sem.c
+++ b/libc/misc/sysvipc/sem.c
@@ -19,6 +19,7 @@
 
 #include <errno.h>
 #include <sys/sem.h>
+#include <stddef.h>
 #include "ipc.h"
 
 
@@ -26,6 +27,7 @@
 /* Return identifier for array of NSEMS semaphores associated with
    KEY.  */
 #include <stdarg.h>
+#include <stdlib.h>
 /* arg for semctl system calls. */
 union semun {
     int val;			/* value for SETVAL */
@@ -53,7 +55,7 @@ int semctl(int semid, int semnum, int cmd, ...)
 #ifdef __NR_semctl
     return __semctl(semid, semnum, cmd | __IPC_64, arg.__pad);
 #else
-    return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd | __IPC_64, &arg, 0);
+    return __syscall_ipc(IPCOP_semctl, semid, semnum, cmd|__IPC_64, &arg, NULL);
 #endif
 }
 #endif
@@ -84,7 +86,7 @@ _syscall3(int, semop, int, semid, struct sembuf *, sops, size_t, nsops);
 /* Perform user-defined atomical operation of array of semaphores.  */
 int semop (int semid, struct sembuf *sops, size_t nsops)
 {
-    return __syscall_ipc(IPCOP_semop, semid, (int) nsops, 0, sops, 0);
+    return __syscall_ipc(IPCOP_semop, semid, (int) nsops, 0, sops, NULL);
 }
 #endif
 #endif
diff --git a/libc/misc/time/Makefile.in b/libc/misc/time/Makefile.in
index b90b9b48f..4c4d510b1 100644
--- a/libc/misc/time/Makefile.in
+++ b/libc/misc/time/Makefile.in
@@ -5,8 +5,10 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC := adjtime.c ftime.c
-
+CSRC := adjtime.c
+ifeq ($(UCLIBC_SUSV3_LEGACY),y)
+CSRC += ftime.c
+endif
 # multi source time.c
 CSRC +=	asctime.c asctime_r.c clock.c ctime.c ctime_r.c gmtime.c gmtime_r.c \
 	localtime.c localtime_r.c mktime.c strftime.c strptime.c tzset.c \