1 files changed, 0 insertions, 100 deletions
diff --git a/libsigsegv/m4/sigaltstack-longjmp.m4 b/libsigsegv/m4/sigaltstack-longjmp.m4
deleted file mode 100644
index 1f72a19e..00000000
--- a/libsigsegv/m4/sigaltstack-longjmp.m4
+++ /dev/null
@@ -1,100 +0,0 @@
-# sigaltstack-longjmp.m4 serial 6 (libsigsegv-2.7)
-dnl Copyright (C) 2002-2003, 2006, 2008 Bruno Haible <bruno@clisp.org>
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
-
-dnl How to longjmp out of a signal handler, in such a way that the
-dnl alternate signal stack remains functional.
-dnl SV_TRY_LEAVE_HANDLER_LONGJMP(KIND, CACHESYMBOL, KNOWN-SYSTEMS,
-dnl                              INCLUDES, RESETCODE)
-AC_DEFUN([SV_TRY_LEAVE_HANDLER_LONGJMP],
-[
-  AC_REQUIRE([AC_PROG_CC])
-  AC_REQUIRE([AC_CANONICAL_HOST])
-
-  AC_CACHE_CHECK([whether a signal handler can be left through longjmp$1], [$2], [
-    AC_RUN_IFELSE([
-      AC_LANG_SOURCE([[
-#include <stdlib.h>
-#include <signal.h>
-#include <setjmp.h>
-$4
-#if HAVE_SETRLIMIT
-# include <sys/types.h>
-# include <sys/time.h>
-# include <sys/resource.h>
-#endif
-#ifndef SIGSTKSZ
-# define SIGSTKSZ 16384
-#endif
-jmp_buf mainloop;
-sigset_t mainsigset;
-int pass = 0;
-void stackoverflow_handler (int sig)
-{
-  pass++;
-  sigprocmask (SIG_SETMASK, &mainsigset, NULL);
-  { $5 }
-  longjmp (mainloop, pass);
-}
-volatile int * recurse_1 (volatile int n, volatile int *p)
-{
-  if (n >= 0)
-    *recurse_1 (n + 1, p) += n;
-  return p;
-}
-int recurse (volatile int n)
-{
-  int sum = 0;
-  return *recurse_1 (n, &sum);
-}
-int main ()
-{
-  char mystack[2 * SIGSTKSZ];
-  stack_t altstack;
-  struct sigaction action;
-  sigset_t emptyset;
-#if defined HAVE_SETRLIMIT && defined RLIMIT_STACK
-  /* Before starting the endless recursion, try to be friendly to the user's
-     machine.  On some Linux 2.2.x systems, there is no stack limit for user
-     processes at all.  We don't want to kill such systems.  */
-  struct rlimit rl;
-  rl.rlim_cur = rl.rlim_max = 0x100000; /* 1 MB */
-  setrlimit (RLIMIT_STACK, &rl);
-#endif
-  /* Install the alternate stack.  Use the midpoint of mystack, to guard
-     against a buggy interpretation of ss_sp on IRIX.  */
-  altstack.ss_sp = mystack + SIGSTKSZ;
-  altstack.ss_size = SIGSTKSZ;
-  altstack.ss_flags = 0; /* no SS_DISABLE */
-  if (sigaltstack (&altstack, NULL) < 0)
-    exit (1);
-  /* Install the SIGSEGV handler.  */
-  sigemptyset (&action.sa_mask);
-  action.sa_handler = &stackoverflow_handler;
-  action.sa_flags = SA_ONSTACK;
-  sigaction (SIGSEGV, &action, (struct sigaction *) NULL);
-  sigaction (SIGBUS, &action, (struct sigaction *) NULL);
-  /* Save the current signal mask.  */
-  sigemptyset (&emptyset);
-  sigprocmask (SIG_BLOCK, &emptyset, &mainsigset);
-  /* Provoke two stack overflows in a row.  */
-  if (setjmp (mainloop) < 2)
-    {
-      recurse (0);
-      exit (2);
-    }
-  exit (0);
-}]])],
-      [$2=yes],
-      [$2=no],
-      [case "$host" in
-         m4_if([$3], [], [], [[$3]) $2=yes ;;])
-         *) $2="guessing no" ;;
-       esac
-      ])
-  ])
-])