- 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.

3 files changed, 6 insertions, 1 deletions

diff --git a/librt/Makefile.in b/librt/Makefile.in
index f6433d30b..c91552acc 100644
--- a/librt/Makefile.in
+++ b/librt/Makefile.in
@@ -16,6 +16,7 @@ librt_FULL_NAME := librt-$(VERSION).so
 librt_DIR := $(top_srcdir)librt
 librt_OUT := $(top_builddir)librt
 
+ifeq ($(UCLIBC_HAS_REALTIME),y)
 librt_SRC := $(wildcard $(librt_DIR)/*.c)
 librt_OBJ := $(patsubst $(librt_DIR)/%.c,$(librt_OUT)/%.o,$(librt_SRC))
 
@@ -28,7 +29,7 @@ librt-so-y += $(librt_OBJ:.o=.os)
 
 lib-a-y += $(top_builddir)lib/librt.a
 lib-so-y += $(top_builddir)lib/librt.so
-objclean-y += librt_clean
+endif
 
 ifeq ($(DOPIC),y)
 $(top_builddir)lib/librt.so: $(top_builddir)lib/librt.a $(libc.depend)
@@ -48,5 +49,7 @@ $(top_builddir)lib/librt.a: $(librt-a-y)
 	$(do_strip)
 	$(do_ar)
 
+objclean-y += librt_clean
+
 librt_clean:
 	$(RM) $(librt_OUT)/*.{o,os,a}
diff --git a/librt/mq_receive.c b/librt/mq_receive.c
index fa48426b9..276b1f573 100644
--- a/librt/mq_receive.c
+++ b/librt/mq_receive.c
@@ -6,6 +6,7 @@
 #include <stddef.h>
 #include <sys/syscall.h>
 #include <mqueue.h>
+#warning FIXME: hard dependency on ADVANCED REALTIME feature
 
 librt_hidden_proto(mq_timedreceive)
 #ifdef __NR_mq_timedreceive
diff --git a/librt/mq_send.c b/librt/mq_send.c
index ee2af4454..fbfc99e46 100644
--- a/librt/mq_send.c
+++ b/librt/mq_send.c
@@ -6,6 +6,7 @@
 #include <stddef.h>
 #include <sys/syscall.h>
 #include <mqueue.h>
+#warning FIXME: hard dependency on ADVANCED REALTIME feature
 
 librt_hidden_proto(mq_timedsend)
 #ifdef __NR_mq_timedsend