> > Indeed. The mbstate_t type and mbsinit etc. functions were not part of
> > C89 + appendices, they were introduced in C99. Therefore, the
> > -D_XOPEN_SOURCE=500 option should better be added to the detection of flags
> > for C99, not C89.
Ben Pfaff corrected me: mbstate_t, mbsinit etc. are part of C89 with normative
attendum 1 included.
Eric Blake wrote:
> We need to guarantee that AC_USE_SYSTEM_EXTENSIONS
> (which works regardless of C flavor) and AC_PROG_CC_C99 both guarantee the
> define
Find attached the patch for AC_USE_SYSTEM_EXTENSIONS. For the C mode, do you
want it in AC_PROG_CC_C89 or AC_PROG_CC_C99 ?
Bruno
2008-12-20 Bruno Haible <br...@clisp.org>
Ensure mbstate_t is defined on HP-UX 11.11 when AC_USE_SYSTEM_EXTENSIONS
is used.
* lib/autoconf/specific.m4 (AC_USE_SYSTEM_EXTENSIONS): Require
AC_CANONICAL_HOST. On HP-UX, define _XOPEN_SOURCE to 500.
--- lib/autoconf/specific.m4.orig 2008-12-20 20:10:05.000000000 +0100
+++ lib/autoconf/specific.m4 2008-12-20 20:01:18.000000000 +0100
@@ -387,6 +387,8 @@
[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],
@@ -399,6 +401,16 @@
[Define to 1 if on MINIX.])
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
+
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],
