When available, use SIGFPE rather than abort for gmp exceptions.

1 files changed, 10 insertions, 7 deletions

diff --git a/errno.c b/errno.c
index d3c02ef4b..c82e8277b 100644
--- a/errno.c
+++ b/errno.c
@@ -33,24 +33,27 @@ GNU Lesser General Public License along with the GNU MP Library.  If not,
 see https://www.gnu.org/licenses/.  */
 
 #include <stdlib.h>
+
+#include <signal.h>
+
 #include "gmp.h"
 #include "gmp-impl.h"
 
 int gmp_errno = 0;
 
 
-/* The deliberate divide by zero triggers an exception on most systems.  On
-   those where it doesn't, for example power and powerpc, use abort instead.
-
-   Enhancement: Perhaps raise(SIGFPE) (or the same with kill()) would be
-   better than abort.  Perhaps it'd be possible to get the BSD style
-   FPE_INTDIV_TRAP parameter in there too.  */
-
+/* Use SIGFPE on systems which have it. Otherwise, deliberate divide
+   by zero, which triggers an exception on most systems. On those
+   where it doesn't, for example power and powerpc, use abort instead. */
 void
 __gmp_exception (int error_bit)
 {
   gmp_errno |= error_bit;
+#ifdef SIGFPE
+  raise (SIGFPE);
+#else
   __gmp_junk = 10 / __gmp_0;
+#endif
   abort ();
 }