[SCM] GNU Autoconf source repository branch, master, updated. v2.69-164-g4f08ddf

[Paul Eggert]

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU Autoconf source repository".

http://git.sv.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=4f08ddfe35825b325ab24ae4252d322d407d10c5

The branch, master has been updated
       via  4f08ddfe35825b325ab24ae4252d322d407d10c5 (commit)
      from  0bd5dbd9b271ade96d2a7783e465b79ec194e8af (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit 4f08ddfe35825b325ab24ae4252d322d407d10c5
Author: Paul Eggert <address@hidden>
Date:   Tue Sep 13 18:28:19 2016 -0700

    AC_USE_SYSTEM_EXTENSIONS: port to recent ISO C
    
    * lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS):
    Also define __STDC_WANT_IEC_60559_BFP_EXT__,
    __STDC_WANT_IEC_60559_FUNCS_EXT__, and __STDC_WANT_LIB_EXT2__.
    * NEWS, doc/autoconf.texi (Posix Variants):
    Document this.  Also, document other changes in this area
    that were not properly documented before.

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

Summary of changes:
 NEWS                     |    5 +++--
 doc/autoconf.texi        |   49 ++++++++++++++++++++++++++++++++++------------
 lib/autoconf/specific.m4 |   17 +++++++++++++++-
 3 files changed, 56 insertions(+), 15 deletions(-)

diff --git a/NEWS b/NEWS
index 5f05ad6..43918bb 100644
--- a/NEWS
+++ b/NEWS
@@ -58,8 +58,9 @@ GNU Autoconf NEWS - User visible changes.
   by default it no longer warns about Bison extensions.  Add -Wyacc to
   YFLAGS to enable these warnings.
 
-- AC_USE_SYSTEM_EXTENSIONS now enables more system extensions on HP-UX,
-  MINIX 3, and OS X.
+- AC_USE_SYSTEM_EXTENSIONS now enables more extensions on HP-UX,
+  macOS, and MINIX, as well as on systems conforming to ISO/IEC TR
+  24731-2:2010, ISO/IEC TS 18661-1:2014, and ISO/IEC TS 18661-4:2015.
 
 - AC_CHECK_DECL and AC_CHECK_DECLS can now report missing declarations for
   functions that are also Clang compiler builtins.
diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index ddbeddf..d3ccf19 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -8588,15 +8588,21 @@ extensions to C, as well as platform extensions not 
defined by Posix.
 @anchor{AC_USE_SYSTEM_EXTENSIONS}
 @defmac AC_USE_SYSTEM_EXTENSIONS
 @acindex{USE_SYSTEM_EXTENSIONS}
address@hidden _ALL_SOURCE
 @cvindex _GNU_SOURCE
address@hidden _ALL_SOURCE
address@hidden _DARWIN_C_SOURCE
 @cvindex _MINIX
address@hidden _NETBSD_SOURCE
 @cvindex _POSIX_1_SOURCE
 @cvindex _POSIX_PTHREAD_SEMANTICS
 @cvindex _POSIX_SOURCE
 @cvindex _TANDEM_SOURCE
address@hidden _XOPEN_SOURCE
 @cvindex __EXTENSIONS__
-This macro was introduced in Autoconf 2.60.  If possible, enable
address@hidden __STDC_WANT_IEC_60559_BFP_EXT__
address@hidden __STDC_WANT_IEC_60559_FUNCS_EXT__
address@hidden __STDC_WANT_LIB_EXT2__
+If possible, enable
 extensions to C or Posix on hosts that normally disable the extensions,
 typically due to standards-conformance namespace issues.  This should be
 called before any macros that run the C compiler.  The following
@@ -8605,22 +8611,41 @@ preprocessor macros are defined where appropriate:
 @table @code
 @item _GNU_SOURCE
 Enable extensions on GNU/Linux.
address@hidden __EXTENSIONS__
-Enable general extensions on Solaris.
address@hidden _POSIX_PTHREAD_SEMANTICS
-Enable threading extensions on Solaris.
address@hidden _TANDEM_SOURCE
-Enable extensions for the HP NonStop platform.
 @item _ALL_SOURCE
 Enable extensions for AIX 3, and for Interix.
address@hidden _POSIX_SOURCE
-Enable Posix functions for Minix.
address@hidden _POSIX_1_SOURCE
-Enable additional Posix functions for Minix.
address@hidden _DARWIN_C_SOURCE
+Enable extensions for macOS.
 @item _MINIX
 Identify Minix platform.  This particular preprocessor macro is
 obsolescent, and may be removed in a future release of Autoconf.
address@hidden _NETBSD_SOURCE
+Enable NetBSD-related extensions for Minix.
address@hidden _POSIX_1_SOURCE
+Enable additional Posix functions for Minix.
address@hidden _POSIX_PTHREAD_SEMANTICS
+Enable threading extensions on Solaris.
address@hidden _POSIX_SOURCE
+Enable Posix functions for Minix.
address@hidden _TANDEM_SOURCE
+Enable extensions for the HP NonStop platform.
address@hidden _XOPEN_SOURCE
+Enable X/Open extensions for HP-UX.
address@hidden __EXTENSIONS__
+Enable general extensions on Solaris.
address@hidden __STDC_WANT_IEC_60559_BFP_EXT__
+Enable extensions specified by ISO/IEC TS 18661-1:2014.
address@hidden __STDC_WANT_IEC_60559_FUNCS_EXT__
+Enable extensions specified by ISO/IEC TS 18661-4:2015.
address@hidden __STDC_WANT_LIB_EXT2__
+Enable extensions specified by ISO/IEC TR 24731-2:2010.
 @end table
+
+The macro @code{__STDC_WANT_LIB_EXT1__} is not defined, as C11 Annex K
+is problematic.  See: O'Donell C, Sebor M.
address@hidden://www.open-std.org/jtc1/sc22/wg14/www/docs/n1967.htm, Field
+Experience With Annex K---Bounds Checking Interfaces}.
+
+This macro was introduced in Autoconf 2.60.
 @end defmac
 
 
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index e665b90..ad77be8 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -387,7 +387,7 @@ dnl configure.ac when using autoheader 2.62.
 #ifndef _ALL_SOURCE
 # undef _ALL_SOURCE
 #endif
-/* Enable general extensions on OS X.  */
+/* Enable general extensions on macOS.  */
 #ifndef _DARWIN_C_SOURCE
 # undef _DARWIN_C_SOURCE
 #endif
@@ -399,6 +399,18 @@ dnl configure.ac when using autoheader 2.62.
 #ifndef _POSIX_PTHREAD_SEMANTICS
 # undef _POSIX_PTHREAD_SEMANTICS
 #endif
+/* Enable extensions specified by ISO/IEC TS 18661-1:2014.  */
+#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
+# undef __STDC_WANT_IEC_60559_BFP_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
+#ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
+# undef __STDC_WANT_IEC_60559_FUNCS_EXT__
+#endif
+/* Enable extensions specified by ISO/IEC TR 24731-2:2010.  */
+#ifndef __STDC_WANT_LIB_EXT2__
+# undef __STDC_WANT_LIB_EXT2__
+#endif
 /* Enable extensions on HP NonStop.  */
 #ifndef _TANDEM_SOURCE
 # undef _TANDEM_SOURCE
@@ -428,6 +440,9 @@ dnl configure.ac when using autoheader 2.62.
   AC_DEFINE([_DARWIN_C_SOURCE])
   AC_DEFINE([_GNU_SOURCE])
   AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
+  AC_DEFINE([__STDC_WANT_IEC_60559_BFP_EXT__])
+  AC_DEFINE([__STDC_WANT_IEC_60559_FUNCS_EXT__])
+  AC_DEFINE([__STDC_WANT_LIB_EXT2__])
   AC_DEFINE([_TANDEM_SOURCE])
   AC_CACHE_CHECK([whether _XOPEN_SOURCE should be defined],
     [ac_cv_should_define__xopen_source],


hooks/post-receive
-- 
GNU Autoconf source repository