2013-02-06 Paul Eggert <eggert@cs.ucla.edu>
+ extensions: port better to MINUX 3, HP-UX, autoheader 2.62
+ Some of these changes are merged in from git Autoconf.
+ * m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS):
+ When deciding whether to define _XOPEN_SOURCE, inspect the
+ preprocessor macro __hpux instead of the more-heavyweight
+ operation of requiring AC_CANONICAL_HOST. Define _NETBSD_HOST on
+ MINUX, for MINUX 3. Use USE_SYSTEM_EXTENSIONS, not __EXTENSIONS__,
+ as the key for __EXTENSIONS__.
+
unistd: avoid namespace pollution on non-glibc systems
* lib/unistd.in.h: #define __need_getopt before including <getopt.h>.
This avoids namespace pollution on non-glibc systems, by causing
-# serial 12 -*- Autoconf -*-
+# serial 13 -*- Autoconf -*-
# Enable extensions on systems that normally disable them.
# Copyright (C) 2003, 2006-2013 Free Software Foundation, Inc.
# ------------------------
# Enable extensions on systems that normally disable them,
# typically due to standards-conformance issues.
+#
# Remember that #undef in AH_VERBATIM gets replaced with #define by
# AC_DEFINE. The goal here is to define all known feature-enabling
# macros, then, if reports of conflicts are made, disable macros that
[AC_BEFORE([$0], [AC_COMPILE_IFELSE])dnl
AC_BEFORE([$0], [AC_RUN_IFELSE])dnl
- AC_REQUIRE([AC_CANONICAL_HOST])
-
AC_CHECK_HEADER([minix/config.h], [MINIX=yes], [MINIX=])
if test "$MINIX" = yes; then
AC_DEFINE([_POSIX_SOURCE], [1],
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 HP-UX 11.11 defines mbstate_t only if _XOPEN_SOURCE is defined to 500,
- dnl regardless of whether the flags -Ae or _D_HPUX_SOURCE=1 are already
- dnl provided.
- case "$host_os" in
- hpux*)
- AC_DEFINE([_XOPEN_SOURCE], [500],
- [Define to 500 only on HP-UX.])
- ;;
- esac
-
- AH_VERBATIM([__EXTENSIONS__],
+dnl Use a different key than __EXTENSIONS__, as that name broke existing
+dnl configure.ac when using autoheader 2.62.
+ AH_VERBATIM([USE_SYSTEM_EXTENSIONS],
[/* Enable extensions on AIX 3, Interix. */
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE
#endif
-/* Enable general extensions on Mac OS X. */
+/* Enable general extensions on OS X. */
#ifndef _DARWIN_C_SOURCE
# undef _DARWIN_C_SOURCE
#endif
#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