GNU C Library master sources branch master updated. glibc-2.29.9000-39-gf289e65

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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f289e656ec8221756519a601042bc9fbe1b310fb

commit f289e656ec8221756519a601042bc9fbe1b310fb
Author: Florian Weimer <fweimer@redhat.com>
Date:   Fri Feb 8 10:21:56 2019 +0100

    rt: Turn forwards from librt to libc into compat symbols [BZ #24194]
    
    As the  result of commit 6e6249d0b461b952d0f544792372663feb6d792a
    ("BZ#14743: Move clock_* symbols from librt to libc."), in glibc 2.17,
    clock_gettime, clock_getres, clock_settime, clock_getcpuclockid,
    clock_nanosleep were added to libc, and the file rt/clock-compat.c
    was added with forwarders to the actual implementations in libc.
    These forwarders were wrapped in
    
    #if SHLIB_COMPAT (librt, GLIBC_2_2, GLIBC_2_17)
    
    so that they are not present for newer architectures (such as
    powerpc64le) with a 2.17 or later ABI baseline.  But the forwarders
    were not marked as compatibility symbols.  As a result, on older
    architectures, historic configure checks such as
    
    AC_CHECK_LIB(rt, clock_gettime)
    
    still cause linking against librt, even though this is completely
    unnecessary.  It also creates a needless porting hazard because
    architectures behave differently when it comes to symbol availability.
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

diff --git a/ChangeLog b/ChangeLog
index 29f4ac3..20ff76a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2019-02-07  Florian Weimer  <fweimer@redhat.com>
+
+	* rt/clock-compat.c (COMPAT_REDIRECT): Turn librt forwarders into
+	compatibility symbols.
+
 2019-02-07  Stefan Liebler  <stli@linux.ibm.com>
 
 	[BZ #24180]
diff --git a/NEWS b/NEWS
index e14008d..45792f6 100644
--- a/NEWS
+++ b/NEWS
@@ -14,7 +14,11 @@ Major new features:
 
 Deprecated and removed features, and other changes affecting compatibility:
 
-  [Add deprecations, removals and changes affecting compatibility here]
+* The functions clock_gettime, clock_getres, clock_settime,
+  clock_getcpuclockid, clock_nanosleep were removed from the librt library
+  for new applications (on architectures which had them).  Instead, the
+  definitions in libc will be used automatically, which have been available
+  since glibc 2.17.
 
 Changes to build and runtime requirements:
 
diff --git a/rt/clock-compat.c b/rt/clock-compat.c
index c603f40..d8ced3c 100644
--- a/rt/clock-compat.c
+++ b/rt/clock-compat.c
@@ -30,14 +30,16 @@
 #if HAVE_IFUNC
 # undef INIT_ARCH
 # define INIT_ARCH()
-# define COMPAT_REDIRECT(name, proto, arglist) libc_ifunc (name, &__##name)
+# define COMPAT_REDIRECT(name, proto, arglist) libc_ifunc (name, &__##name) \
+    compat_symbol (librt, name, name, GLIBC_2_2);
 #else
 # define COMPAT_REDIRECT(name, proto, arglist)				      \
   int									      \
   name proto								      \
   {									      \
     return __##name arglist;						      \
-  }
+  }									      \
+  compat_symbol (librt, name, name, GLIBC_2_2);
 #endif
 
 COMPAT_REDIRECT (clock_getres,

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog         |    5 +++++
 NEWS              |    6 +++++-
 rt/clock-compat.c |    6 ++++--
 3 files changed, 14 insertions(+), 3 deletions(-)


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