Paul Eggert
2016-09-15 17:10:17 UTC
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The branch, master has been updated
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- Log -----------------------------------------------------------------
commit 9021c82280a80b5f46df3d784d1fdcfb12405ff5
Author: Paul Eggert <***@cs.ucla.edu>
Date: Thu Sep 15 10:08:56 2016 -0700
AC_USE_SYSTEM_EXTENSIONS: port to more ISO C TSes
* doc/autoconf.texi (C and Posix Variants): Rename from "Posix
Variants", and document updated behavior.
* lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS): Also define
__STDC_WANT_IEC_60559_ATTRIBS_EXT__,
__STDC_WANT_IEC_60559_DFP_EXT__,
__STDC_WANT_IEC_60559_TYPES_EXT__, and
__STDC_WANT_MATH_SPEC_FUNCS__. From a suggestion by Joseph Myers in:
http://lists.gnu.org/archive/html/autoconf-patches/2016-09/msg00011.html
-----------------------------------------------------------------------
Summary of changes:
NEWS | 4 +--
doc/autoconf.texi | 65 ++++++++++++++++++++++++++++++----------------
lib/autoconf/specific.m4 | 20 ++++++++++++++
3 files changed, 64 insertions(+), 25 deletions(-)
diff --git a/NEWS b/NEWS
index 43918bb..a4c53dd 100644
--- a/NEWS
+++ b/NEWS
@@ -59,8 +59,8 @@ GNU Autoconf NEWS - User visible changes.
YFLAGS to enable these warnings.
- 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.
+ macOS, and MINIX, as well as on systems conforming to recent
+ ISO/IEC C technical reports and specifications.
- 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 4f041bd..36e1938 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -363,7 +363,7 @@ Existing Tests
* Types:: Types that might be missing
* Compilers and Preprocessors:: Checking for compiling programs
* System Services:: Operating system services
-* Posix Variants:: Special kludges for specific Posix variants
+* C and Posix Variants:: Kludges for C and Posix variants
* Erlang Libraries:: Checking for the existence of Erlang libraries
Common Behavior
@@ -3838,7 +3838,7 @@ Symbols}, for how to get those symbol definitions into your program.
* Types:: Types that might be missing
* Compilers and Preprocessors:: Checking for compiling programs
* System Services:: Operating system services
-* Posix Variants:: Special kludges for specific Posix variants
+* C and Posix Variants:: Kludges for C and Posix variants
* Erlang Libraries:: Checking for the existence of Erlang libraries
@end menu
@@ -8606,29 +8606,16 @@ system. If so, set the shell variable @code{ac_cv_sys_posix_termios} to
@samp{yes}. If not, set the variable to @samp{no}.
@end defmac
-@node Posix Variants
-@section Posix Variants
+@node C and Posix Variants
+@section C and Posix Variants
-The following macro makes it possible to use features of Posix that are
-extensions to C, as well as platform extensions not defined by Posix.
+The following macro makes it possible to use C language and library
+extensions defined by the C standards committee, features of Posix that
+are extensions to C, and platform extensions not defined by Posix.
@anchor{AC_USE_SYSTEM_EXTENSIONS}
@defmac AC_USE_SYSTEM_EXTENSIONS
@acindex{USE_SYSTEM_EXTENSIONS}
-@cvindex _GNU_SOURCE
-@cvindex _ALL_SOURCE
-@cvindex _DARWIN_C_SOURCE
-@cvindex _MINIX
-@cvindex _NETBSD_SOURCE
-@cvindex _POSIX_1_SOURCE
-@cvindex _POSIX_PTHREAD_SEMANTICS
-@cvindex _POSIX_SOURCE
-@cvindex _TANDEM_SOURCE
-@cvindex _XOPEN_SOURCE
-@cvindex __EXTENSIONS__
-@cvindex __STDC_WANT_IEC_60559_BFP_EXT__
-@cvindex __STDC_WANT_IEC_60559_FUNCS_EXT__
-@cvindex __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
@@ -8637,42 +8624,74 @@ preprocessor macros are defined where appropriate:
@table @code
@item _GNU_SOURCE
+@cvindex _GNU_SOURCE
Enable extensions on GNU/Linux.
@item _ALL_SOURCE
+@cvindex _ALL_SOURCE
Enable extensions for AIX 3, and for Interix.
@item _DARWIN_C_SOURCE
+@cvindex _DARWIN_C_SOURCE
Enable extensions for macOS.
@item _MINIX
+@cvindex _MINIX
Identify Minix platform. This particular preprocessor macro is
obsolescent, and may be removed in a future release of Autoconf.
@item _NETBSD_SOURCE
+@cvindex _NETBSD_SOURCE
Enable NetBSD-related extensions for Minix.
@item _POSIX_1_SOURCE
+@cvindex _POSIX_1_SOURCE
Enable additional Posix functions for Minix.
@item _POSIX_PTHREAD_SEMANTICS
+@cvindex _POSIX_PTHREAD_SEMANTICS
Enable threading extensions on Solaris.
@item _POSIX_SOURCE
+@cvindex _POSIX_SOURCE
Enable Posix functions for Minix.
@item _TANDEM_SOURCE
+@cvindex _TANDEM_SOURCE
Enable extensions for the HP NonStop platform.
@item _XOPEN_SOURCE
+@cvindex _XOPEN_SOURCE
Enable X/Open extensions for HP-UX.
@item __EXTENSIONS__
+@cvindex __EXTENSIONS__
Enable general extensions on Solaris.
+@item __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+@cvindex __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+Enable extensions specified by ISO/IEC TS 18661-5:2014.
@item __STDC_WANT_IEC_60559_BFP_EXT__
+@cvindex __STDC_WANT_IEC_60559_BFP_EXT__
Enable extensions specified by ISO/IEC TS 18661-1:2014.
+@item __STDC_WANT_IEC_60559_DFP_EXT__
+@cvindex __STDC_WANT_IEC_60559_DFP_EXT__
+Enable extensions specified by ISO/IEC TS 18661-2:2015.
@item __STDC_WANT_IEC_60559_FUNCS_EXT__
+@cvindex __STDC_WANT_IEC_60559_FUNCS_EXT__
Enable extensions specified by ISO/IEC TS 18661-4:2015.
+@item __STDC_WANT_IEC_60559_TYPES_EXT__
+@cvindex __STDC_WANT_IEC_60559_TYPES_EXT__
+Enable extensions specified by ISO/IEC TS 18661-3:2015.
@item __STDC_WANT_LIB_EXT2__
+@cvindex __STDC_WANT_LIB_EXT2__
Enable extensions specified by ISO/IEC TR 24731-2:2010.
+@item __STDC_WANT_MATH_SPEC_FUNCS__
+@cvindex __STDC_WANT_MATH_SPEC_FUNCS__
+Enable extensions specified by ISO/IEC TR 24747:2009.
@end table
-The macro @code{__STDC_WANT_LIB_EXT1__} is not defined, as C11 Annex K
-is problematic. See: O'Donell C, Sebor M.
+@cvindex __STDC_WANT_DEC_FP__
+The C preprocessor macro @code{__STDC_WANT_DEC_FP__} is not defined.
+ISO/IEC TR 24732:2009 was superseded by ISO/IEC TS 18661-2:2015.
+
+@cvindex __STDC_WANT_LIB_EXT1__
+The C preprocessor macro @code{__STDC_WANT_LIB_EXT1__} is not defined,
+as C11 Annex K is problematic. See: O'Donell C, Sebor M.
@uref{http://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.
+The Autoconf macro @code{AC_USE_SYSTEM_EXTENSIONS} was introduced in
+Autoconf 2.60.
@end defmac
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index ad77be8..db47fbb 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -399,18 +399,34 @@ dnl configure.ac when using autoheader 2.62.
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014. */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#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 18661-2:2015. */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_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 TS 18661-3:2015. */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_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 specified by ISO/IEC TR 24747:2009. */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
/* Enable extensions on HP NonStop. */
#ifndef _TANDEM_SOURCE
# undef _TANDEM_SOURCE
@@ -440,9 +456,13 @@ 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_ATTRIBS_EXT__])
AC_DEFINE([__STDC_WANT_IEC_60559_BFP_EXT__])
+ AC_DEFINE([__STDC_WANT_IEC_60559_DFP_EXT__])
AC_DEFINE([__STDC_WANT_IEC_60559_FUNCS_EXT__])
+ AC_DEFINE([__STDC_WANT_IEC_60559_TYPES_EXT__])
AC_DEFINE([__STDC_WANT_LIB_EXT2__])
+ AC_DEFINE([__STDC_WANT_MATH_SPEC_FUNCS__])
AC_DEFINE([_TANDEM_SOURCE])
AC_CACHE_CHECK([whether _XOPEN_SOURCE should be defined],
[ac_cv_should_define__xopen_source],
hooks/post-receive
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=9021c82280a80b5f46df3d784d1fdcfb12405ff5
The branch, master has been updated
via 9021c82280a80b5f46df3d784d1fdcfb12405ff5 (commit)
from e17a30e987d7ee695fb4294a82d987ec3dc9b974 (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 9021c82280a80b5f46df3d784d1fdcfb12405ff5
Author: Paul Eggert <***@cs.ucla.edu>
Date: Thu Sep 15 10:08:56 2016 -0700
AC_USE_SYSTEM_EXTENSIONS: port to more ISO C TSes
* doc/autoconf.texi (C and Posix Variants): Rename from "Posix
Variants", and document updated behavior.
* lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS): Also define
__STDC_WANT_IEC_60559_ATTRIBS_EXT__,
__STDC_WANT_IEC_60559_DFP_EXT__,
__STDC_WANT_IEC_60559_TYPES_EXT__, and
__STDC_WANT_MATH_SPEC_FUNCS__. From a suggestion by Joseph Myers in:
http://lists.gnu.org/archive/html/autoconf-patches/2016-09/msg00011.html
-----------------------------------------------------------------------
Summary of changes:
NEWS | 4 +--
doc/autoconf.texi | 65 ++++++++++++++++++++++++++++++----------------
lib/autoconf/specific.m4 | 20 ++++++++++++++
3 files changed, 64 insertions(+), 25 deletions(-)
diff --git a/NEWS b/NEWS
index 43918bb..a4c53dd 100644
--- a/NEWS
+++ b/NEWS
@@ -59,8 +59,8 @@ GNU Autoconf NEWS - User visible changes.
YFLAGS to enable these warnings.
- 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.
+ macOS, and MINIX, as well as on systems conforming to recent
+ ISO/IEC C technical reports and specifications.
- 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 4f041bd..36e1938 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -363,7 +363,7 @@ Existing Tests
* Types:: Types that might be missing
* Compilers and Preprocessors:: Checking for compiling programs
* System Services:: Operating system services
-* Posix Variants:: Special kludges for specific Posix variants
+* C and Posix Variants:: Kludges for C and Posix variants
* Erlang Libraries:: Checking for the existence of Erlang libraries
Common Behavior
@@ -3838,7 +3838,7 @@ Symbols}, for how to get those symbol definitions into your program.
* Types:: Types that might be missing
* Compilers and Preprocessors:: Checking for compiling programs
* System Services:: Operating system services
-* Posix Variants:: Special kludges for specific Posix variants
+* C and Posix Variants:: Kludges for C and Posix variants
* Erlang Libraries:: Checking for the existence of Erlang libraries
@end menu
@@ -8606,29 +8606,16 @@ system. If so, set the shell variable @code{ac_cv_sys_posix_termios} to
@samp{yes}. If not, set the variable to @samp{no}.
@end defmac
-@node Posix Variants
-@section Posix Variants
+@node C and Posix Variants
+@section C and Posix Variants
-The following macro makes it possible to use features of Posix that are
-extensions to C, as well as platform extensions not defined by Posix.
+The following macro makes it possible to use C language and library
+extensions defined by the C standards committee, features of Posix that
+are extensions to C, and platform extensions not defined by Posix.
@anchor{AC_USE_SYSTEM_EXTENSIONS}
@defmac AC_USE_SYSTEM_EXTENSIONS
@acindex{USE_SYSTEM_EXTENSIONS}
-@cvindex _GNU_SOURCE
-@cvindex _ALL_SOURCE
-@cvindex _DARWIN_C_SOURCE
-@cvindex _MINIX
-@cvindex _NETBSD_SOURCE
-@cvindex _POSIX_1_SOURCE
-@cvindex _POSIX_PTHREAD_SEMANTICS
-@cvindex _POSIX_SOURCE
-@cvindex _TANDEM_SOURCE
-@cvindex _XOPEN_SOURCE
-@cvindex __EXTENSIONS__
-@cvindex __STDC_WANT_IEC_60559_BFP_EXT__
-@cvindex __STDC_WANT_IEC_60559_FUNCS_EXT__
-@cvindex __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
@@ -8637,42 +8624,74 @@ preprocessor macros are defined where appropriate:
@table @code
@item _GNU_SOURCE
+@cvindex _GNU_SOURCE
Enable extensions on GNU/Linux.
@item _ALL_SOURCE
+@cvindex _ALL_SOURCE
Enable extensions for AIX 3, and for Interix.
@item _DARWIN_C_SOURCE
+@cvindex _DARWIN_C_SOURCE
Enable extensions for macOS.
@item _MINIX
+@cvindex _MINIX
Identify Minix platform. This particular preprocessor macro is
obsolescent, and may be removed in a future release of Autoconf.
@item _NETBSD_SOURCE
+@cvindex _NETBSD_SOURCE
Enable NetBSD-related extensions for Minix.
@item _POSIX_1_SOURCE
+@cvindex _POSIX_1_SOURCE
Enable additional Posix functions for Minix.
@item _POSIX_PTHREAD_SEMANTICS
+@cvindex _POSIX_PTHREAD_SEMANTICS
Enable threading extensions on Solaris.
@item _POSIX_SOURCE
+@cvindex _POSIX_SOURCE
Enable Posix functions for Minix.
@item _TANDEM_SOURCE
+@cvindex _TANDEM_SOURCE
Enable extensions for the HP NonStop platform.
@item _XOPEN_SOURCE
+@cvindex _XOPEN_SOURCE
Enable X/Open extensions for HP-UX.
@item __EXTENSIONS__
+@cvindex __EXTENSIONS__
Enable general extensions on Solaris.
+@item __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+@cvindex __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+Enable extensions specified by ISO/IEC TS 18661-5:2014.
@item __STDC_WANT_IEC_60559_BFP_EXT__
+@cvindex __STDC_WANT_IEC_60559_BFP_EXT__
Enable extensions specified by ISO/IEC TS 18661-1:2014.
+@item __STDC_WANT_IEC_60559_DFP_EXT__
+@cvindex __STDC_WANT_IEC_60559_DFP_EXT__
+Enable extensions specified by ISO/IEC TS 18661-2:2015.
@item __STDC_WANT_IEC_60559_FUNCS_EXT__
+@cvindex __STDC_WANT_IEC_60559_FUNCS_EXT__
Enable extensions specified by ISO/IEC TS 18661-4:2015.
+@item __STDC_WANT_IEC_60559_TYPES_EXT__
+@cvindex __STDC_WANT_IEC_60559_TYPES_EXT__
+Enable extensions specified by ISO/IEC TS 18661-3:2015.
@item __STDC_WANT_LIB_EXT2__
+@cvindex __STDC_WANT_LIB_EXT2__
Enable extensions specified by ISO/IEC TR 24731-2:2010.
+@item __STDC_WANT_MATH_SPEC_FUNCS__
+@cvindex __STDC_WANT_MATH_SPEC_FUNCS__
+Enable extensions specified by ISO/IEC TR 24747:2009.
@end table
-The macro @code{__STDC_WANT_LIB_EXT1__} is not defined, as C11 Annex K
-is problematic. See: O'Donell C, Sebor M.
+@cvindex __STDC_WANT_DEC_FP__
+The C preprocessor macro @code{__STDC_WANT_DEC_FP__} is not defined.
+ISO/IEC TR 24732:2009 was superseded by ISO/IEC TS 18661-2:2015.
+
+@cvindex __STDC_WANT_LIB_EXT1__
+The C preprocessor macro @code{__STDC_WANT_LIB_EXT1__} is not defined,
+as C11 Annex K is problematic. See: O'Donell C, Sebor M.
@uref{http://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.
+The Autoconf macro @code{AC_USE_SYSTEM_EXTENSIONS} was introduced in
+Autoconf 2.60.
@end defmac
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index ad77be8..db47fbb 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -399,18 +399,34 @@ dnl configure.ac when using autoheader 2.62.
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
#endif
+/* Enable extensions specified by ISO/IEC TS 18661-5:2014. */
+#ifndef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+# undef __STDC_WANT_IEC_60559_ATTRIBS_EXT__
+#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 18661-2:2015. */
+#ifndef __STDC_WANT_IEC_60559_DFP_EXT__
+# undef __STDC_WANT_IEC_60559_DFP_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 TS 18661-3:2015. */
+#ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
+# undef __STDC_WANT_IEC_60559_TYPES_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 specified by ISO/IEC TR 24747:2009. */
+#ifndef __STDC_WANT_MATH_SPEC_FUNCS__
+# undef __STDC_WANT_MATH_SPEC_FUNCS__
+#endif
/* Enable extensions on HP NonStop. */
#ifndef _TANDEM_SOURCE
# undef _TANDEM_SOURCE
@@ -440,9 +456,13 @@ 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_ATTRIBS_EXT__])
AC_DEFINE([__STDC_WANT_IEC_60559_BFP_EXT__])
+ AC_DEFINE([__STDC_WANT_IEC_60559_DFP_EXT__])
AC_DEFINE([__STDC_WANT_IEC_60559_FUNCS_EXT__])
+ AC_DEFINE([__STDC_WANT_IEC_60559_TYPES_EXT__])
AC_DEFINE([__STDC_WANT_LIB_EXT2__])
+ AC_DEFINE([__STDC_WANT_MATH_SPEC_FUNCS__])
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
GNU Autoconf source repository