Fixes: debbugs:13222

* configure.ac (SIGNALS_VIA_CHARACTERS): Also define for darwin.

ChangeLog

+2012-12-24  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* configure.ac (SIGNALS_VIA_CHARACTERS): Also define for darwin.
+	(Bug#13222)
+
 2012-12-20  Akinori MUSHA  <knu@iDaemons.org>  (tiny change)
 
 	* Makefile.in (install-arch-dep): Ignore chmod errors.  (Bug#13233)

configure.ac

@@ -3633,7 +3633,7 @@ AH_TEMPLATE(SIGNALS_VIA_CHARACTERS, [Make process_send_signal work by
 case $opsys in
   dnl Perry Smith <pedz@ddivt1.austin.ibm.com> says this is correct for AIX.
   dnl thomas@mathematik.uni-bremen.de says this is needed for IRIX.
-  aix4-2 | cygwin | gnu | irix6-5 | freebsd | netbsd | openbsd )
+  aix4-2 | cygwin | gnu | irix6-5 | freebsd | netbsd | openbsd | darwin )
     AC_DEFINE(SIGNALS_VIA_CHARACTERS, 1)
     ;;