Check for sig_atomic_t.

configure.in

-dnl $Id: configure.in,v 1.66 1999/06/23 21:57:28 ceder Exp $
+dnl $Id: configure.in,v 1.67 1999/06/25 21:21:02 ceder Exp $
 dnl Configuration for LysKOM
 dnl Copyright (C) 1993-1999  Lysator Academic Computer Association.
 dnl
@@ -18,7 +18,7 @@ dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 dnl
 dnl Please mail bug reports to bug-lyskom@lysator.liu.se. 
 dnl
-AC_REVISION($Revision: 1.66 $)
+AC_REVISION($Revision: 1.67 $)
 AC_INIT(src/server/lyskomd.h)
 AM_CONFIG_HEADER(config.h)
 AC_CONFIG_AUX_DIR(scripts)
@@ -186,6 +186,19 @@ AC_C_INLINE
 CMOD_C_ATTRIBUTE_UNUSED
 AC_HEADER_STDC
 AC_TYPE_PID_T
+dnl
+dnl Check for sig_atomic_t
+dnl
+AC_CACHE_CHECK([if sig_atomic_t exists], kom_cv_type_sig_atomic_t,
+[AC_TRY_COMPILE([#include <signal.h>],
+	[sig_atomic_t t;], 
+	[kom_cv_type_sig_atomic_t=yes], 
+	[kom_cv_type_sig_atomic_t=no])])
+[if test $kom_cv_type_sig_atomic_t = no
+then]
+    AC_DEFINE(sig_atomic_t, int)
+[fi]
+dnl
 # FIXME: is this needed now that we use AM_C_PROTOTYPES?
 AC_MSG_CHECKING([if _HPUX_SOURCE needs to be defined])
 AC_CACHE_VAL([kom_cv_sys_hpux_source],