memmem.m4: don't call exit() from signal handler

diff --git a/gl/m4/memmem.m4 b/gl/m4/memmem.m4
index 80f2b1e3399ce753d924dc7b02aee225c0d03814..b190a7cb9bcfa696718855ca7c7084a38d454a20 100644 (file)
--- a/gl/m4/memmem.m4
+++ b/gl/m4/memmem.m4
@@ -93,7 +93,7 @@ AC_DEFUN([gl_FUNC_MEMMEM],
 #include <string.h> /* for memmem */
 #include <stdlib.h> /* for malloc */
 #include <unistd.h> /* for alarm */
-static void quit (int sig) { exit (sig + 128); }
+static void quit (int sig) { _exit (sig + 128); }
 ]], [[
     int result = 0;
     size_t m = 1000000;