Eric Blake wrote:
> When overriding an autoconf macro, it is safer practice to wrap the
> override with m4_ifndef or with m4_version_compare. That way, if a later
> autoconf version changes the internal implementation to something that
> works better, your override isn't trapping users with the old semantics.
I thought that we would then also update gnulib. But anyway,I'm doing as you
say:
2008-12-17 Bruno Haible <br...@clisp.org>
* m4/mbrtowc.m4 (AC_FUNC_MBRTOWC): Don't override in autoconf >= 2.60.
Suggested by Eric Blake.
--- m4/mbrtowc.m4.orig 2008-12-18 03:25:03.000000000 +0100
+++ m4/mbrtowc.m4 2008-12-18 03:14:13.000000000 +0100
@@ -9,6 +9,7 @@
dnl This override of an autoconf macro can be removed when autoconf 2.60 or
dnl newer can be assumed everywhere.
+m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.60]),[-1],[
AC_DEFUN([AC_FUNC_MBRTOWC],
[
dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60.
@@ -29,3 +30,4 @@
[Define to 1 if mbrtowc and mbstate_t are properly declared.])
fi
])
+])
