On UN*X, always use sigaction(), and always have signal handlers return void.

Some time between the mid 1980's and 1990 called; they want their
old-fashioned UNIX signal handling back.  ANSI C has had signal handlers
returning void sincer, well, 1989, and POSIX has had sigaction() since
close to forever.  No need to worry about really old UN*Xes here.

On Windows, it's also void (as per ANSI C); use signal().

1 files changed, 0 insertions, 79 deletions

diff --git a/configure b/configure
index 6e98d577..e359c868 100755
--- a/configure
+++ b/configure
@@ -5102,85 +5102,6 @@ esac
 
 fi
 
-
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking return type of signal handlers" >&5
-$as_echo_n "checking return type of signal handlers... " >&6; }
-if ${ac_cv_type_signal+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
-#include <signal.h>
-
-int
-main ()
-{
-return *(signal (0, 0)) (0) == 1;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_type_signal=int
-else
-  ac_cv_type_signal=void
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_signal" >&5
-$as_echo "$ac_cv_type_signal" >&6; }
-
-cat >>confdefs.h <<_ACEOF
-#define RETSIGTYPE $ac_cv_type_signal
-_ACEOF
-
-
-    if test "$ac_cv_type_signal" = void ; then
-
-$as_echo "#define RETSIGVAL /**/" >>confdefs.h
-
-    else
-
-$as_echo "#define RETSIGVAL (0)" >>confdefs.h
-
-    fi
-    case "$host_os" in
-
-    irix*)
-
-$as_echo "#define _BSD_SIGNALS 1" >>confdefs.h
-
-	    ;;
-
-    *)
-	    	    for ac_func in sigaction
-do :
-  ac_fn_c_check_func "$LINENO" "sigaction" "ac_cv_func_sigaction"
-if test "x$ac_cv_func_sigaction" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SIGACTION 1
-_ACEOF
-
-fi
-done
-
-	    if test $ac_cv_func_sigaction = no ; then
-		    for ac_func in sigset
-do :
-  ac_fn_c_check_func "$LINENO" "sigset" "ac_cv_func_sigset"
-if test "x$ac_cv_func_sigset" = xyes; then :
-  cat >>confdefs.h <<_ACEOF
-#define HAVE_SIGSET 1
-_ACEOF
-
-fi
-done
-
-	    fi
-	    ;;
-    esac
-
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing dnet_htoa" >&5
 $as_echo_n "checking for library containing dnet_htoa... " >&6; }
 if ${ac_cv_search_dnet_htoa+:} false; then :