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AC_USE_SYSTEM_EXTENSIONS: port to HP-UX, MINUX 3, OS X.

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* NEWS: Mention this.
* lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS):
Define _NETBSD_HOST on MINUX, for MINUX 3.
Define _DARWIN_C_SOURCE, for OS X.
On HP-UX, define _XOPEN_SOURCE.
This commit is contained in:
Paul Eggert 2013-02-06 22:46:49 -08:00
parent e5654a5591
commit 9e33646cac
2 changed files with 16 additions and 1 deletions
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3
NEWS
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@ -33,6 +33,9 @@ GNU Autoconf NEWS - User visible changes.
- AC_PROG_CC_STDC, AC_PROG_CC_C89, AC_PROG_CC_C99 have been marked as obsolete.
Applications should use AC_PROG_CC.
- AC_USE_SYSTEM_EXTENSIONS now enables more system extensions on HP-UX,
MINIX 3, and OS X.
- AC_FUNC_VFORK now checks for the signal-handling bug in Solaris 2.4 'vfork'.
Formerly, it ignored this bug, so that Emacs could use some tricky
code on that platform. Solaris 2.4 has not been supported since

14
lib/autoconf/specific.m4
View File

@ -369,13 +369,15 @@ AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
if test "$MINIX" = yes; then
AC_DEFINE([_POSIX_SOURCE], [1],
[Define to 1 if you need to in order for `stat' and other
[Define to 1 if you need to in order for 'stat' and other
things to work.])
AC_DEFINE([_POSIX_1_SOURCE], [2],
[Define to 2 if the system does not provide POSIX.1 features
except with this defined.])
AC_DEFINE([_MINIX], [1],
[Define to 1 if on MINIX.])
AC_DEFINE([_NETBSD_SOURCE], [1],
[Define to 1 to make NetBSD features available. MINIX 3 needs this.])
fi
dnl Use a different key than __EXTENSIONS__, as that name broke existing
@ -385,10 +387,19 @@ dnl configure.ac when using autoheader 2.62.
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE
#endif
/* Enable general extensions on OS X. */
#ifndef _DARWIN_C_SOURCE
# undef _DARWIN_C_SOURCE
#endif
/* Enable GNU extensions on systems that have them. */
#ifndef _GNU_SOURCE
# undef _GNU_SOURCE
#endif
/* HP-UX 11.11 defines mbstate_t only if _XOPEN_SOURCE is defined to 500,
regardless of whether compiling with -Ae or -D_HPUX_SOURCE=1. */
#ifdef __hpux
# define _XOPEN_SOURCE 500
#endif
/* Enable threading extensions on Solaris. */
#ifndef _POSIX_PTHREAD_SEMANTICS
# undef _POSIX_PTHREAD_SEMANTICS
@ -413,6 +424,7 @@ dnl configure.ac when using autoheader 2.62.
test $ac_cv_safe_to_define___extensions__ = yes &&
AC_DEFINE([__EXTENSIONS__])
AC_DEFINE([_ALL_SOURCE])
AC_DEFINE([_DARWIN_C_SOURCE])
AC_DEFINE([_GNU_SOURCE])
AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
AC_DEFINE([_TANDEM_SOURCE])