maint: update copyright

[gnulib.git] / m4 / libsigsegv.m4

diff --git a/m4/libsigsegv.m4 b/m4/libsigsegv.m4
index ecd81f2..1f9298e 100644 (file)
--- a/m4/libsigsegv.m4
+++ b/m4/libsigsegv.m4
@@ -1,5 +1,5 @@
-# libsigsegv.m4 serial 3
-dnl Copyright (C) 2002-2003, 2008, 2009 Free Software Foundation, Inc.
+# libsigsegv.m4 serial 4
+dnl Copyright (C) 2002-2003, 2008-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -8,41 +8,9 @@ dnl From Bruno Haible, Sam Steingold.
 
 AC_DEFUN([gl_LIBSIGSEGV],
 [
-  dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
-  AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
-  AC_REQUIRE([AC_LIB_RPATH])
-
-  dnl Search for libsigsegv and define LIBSIGSEGV, LTLIBSIGSEGV and INCSIGSEGV
-  dnl accordingly.
-  AC_LIB_LINKFLAGS_BODY([sigsegv])
-
-  dnl Add $INCSIGSEGV to CPPFLAGS before performing the following checks,
-  dnl because if the user has installed libsigsegv and not disabled its use
-  dnl via --without-libsigsegv-prefix, he wants to use it.
-  gl_save_CPPFLAGS="$CPPFLAGS"
-  AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCSIGSEGV])
-
-  AC_CACHE_CHECK([for libsigsegv], [gl_cv_lib_sigsegv], [
-    gl_cv_lib_sigsegv="no, consider installing GNU libsigsegv"
-    gl_save_LIBS="$LIBS"
-    LIBS="$LIBS $LIBSIGSEGV"
-    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sigsegv.h>]],
-      [sigsegv_deinstall_handler();])],
-      [gl_cv_lib_sigsegv=yes])
-    LIBS="$gl_save_LIBS"
-  ])
-  if test "$gl_cv_lib_sigsegv" = yes; then
-    AC_DEFINE([HAVE_LIBSIGSEGV], [1],
-      [Define if you have the libsigsegv library.])
-    AC_MSG_CHECKING([how to link with libsigsegv])
-    AC_MSG_RESULT([$LIBSIGSEGV])
-  else
-    dnl If $LIBSIGSEGV didn't lead to a usable library, we don't need
-    dnl $INCSIGSEGV either.
-    CPPFLAGS="$gl_save_CPPFLAGS"
-    LIBSIGSEGV=
-    LTLIBSIGSEGV=
-  fi
-  AC_SUBST([LIBSIGSEGV])
-  AC_SUBST([LTLIBSIGSEGV])
+  AC_LIB_HAVE_LINKFLAGS([sigsegv], [],
+    [#include <sigsegv.h>], [sigsegv_deinstall_handler();],
+    [no, consider installing GNU libsigsegv])
+  dnl Some other autoconf macros and clisp's configure use this variable.
+  gl_cv_lib_sigsegv="$ac_cv_libsigsegv"
 ])