[pacman-dev] autoconf-2.68 introduces a warning

[Allan McRae]

Autoconf-2.68 gives us this warning with pacman:

 > ./autogen.sh
+ aclocal
configure.ac:128: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call 
detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2662: _AC_LINK_IFELSE is expanded from...
../../lib/autoconf/general.m4:2679: AC_LINK_IFELSE is expanded from...
acinclude.m4:265: _LT_AC_SYS_LIBPATH_AIX is expanded from...
acinclude.m4:3807: AC_LIBTOOL_PROG_LD_SHLIBS is expanded from...
acinclude.m4:2583: _LT_AC_LANG_C_CONFIG is expanded from...
acinclude.m4:2582: AC_LIBTOOL_LANG_C_CONFIG is expanded from...
acinclude.m4:54: AC_LIBTOOL_SETUP is expanded from...
acinclude.m4:37: _AC_PROG_LIBTOOL is expanded from...
acinclude.m4:30: AC_PROG_LIBTOOL is expanded from...
configure.ac:128: the top level
...

The relevant upstream commit is:
http://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=1e604ecf

I am not likely to fix this in the near future so if someone else wants 
to submit a patch...

Allan