X-Git-Url: http://git.hcoop.net/bpt/guile.git/blobdiff_plain/4bfe73072b75259a97a9daa81ed5c9c01e8a4af5..6570cfdfd83b0d792f6ff01594915f3ec1336b16:/m4/frexp.m4

diff --git a/m4/frexp.m4 b/m4/frexp.m4
index fb8db7046..579826213 100644
--- a/m4/frexp.m4
+++ b/m4/frexp.m4
@@ -1,5 +1,5 @@
-# frexp.m4 serial 14
-dnl Copyright (C) 2007-2012 Free Software Foundation, Inc.
+# frexp.m4 serial 15
+dnl Copyright (C) 2007-2014 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.
@@ -93,7 +93,7 @@ AC_DEFUN([gl_FUNC_FREXP_WORKS],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_CHECK_FUNCS_ONCE([alarm])
+  AC_CHECK_DECLS_ONCE([alarm])
   AC_CACHE_CHECK([whether frexp works], [gl_cv_func_frexp_works],
     [
       AC_RUN_IFELSE(
@@ -101,7 +101,8 @@ AC_DEFUN([gl_FUNC_FREXP_WORKS],
 #include <float.h>
 #include <math.h>
 #include <string.h>
-#if HAVE_ALARM
+#if HAVE_DECL_ALARM
+# include <signal.h>
 # include <unistd.h>
 #endif
 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
@@ -124,9 +125,10 @@ int main()
   int i;
   volatile double x;
   double zero = 0.0;
-#if HAVE_ALARM
+#if HAVE_DECL_ALARM
   /* NeXTstep 3.3 frexp() runs into an endless loop when called on an infinite
      number.  Let the test fail in this case.  */
+  signal (SIGALRM, SIG_DFL);
   alarm (5);
 #endif
   /* Test on denormalized numbers.  */