Fix autoconf test bug introduced on 2008-01-15.

diff --git a/ChangeLog b/ChangeLog
index dbf97997edb10df54e2acfd8136f292644c395ac..7929dcd856d5173281931c3ae284827ddb932949 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-01-30  Andreas Schwab  <schwab@suse.de>
+            Bruno Haible  <bruno@clisp.org>
+
+       * m4/frexpl.m4 (gl_FUNC_FREXPL_WORKS): Include <float.h> and ensure a
+       correct definition of LDBL_MIN_EXP.
+
 2008-01-30  Karl Berry  <karl@gnu.org>
 
        * config/srclist-update: try to preserve x bit on updates.

diff --git a/m4/frexpl.m4 b/m4/frexpl.m4
index a4f2bd8cc695c47f00309f2b66cfd8b694392fb6..c6bdff6c23ab2956357bbd9aa5f7f67aad227dfe 100644 (file)
--- a/m4/frexpl.m4
+++ b/m4/frexpl.m4
@@ -1,4 +1,4 @@
-# frexpl.m4 serial 7
+# frexpl.m4 serial 8
 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -106,7 +106,13 @@ AC_DEFUN([gl_FUNC_FREXPL_WORKS],
   AC_CACHE_CHECK([whether frexpl works], [gl_cv_func_frexpl_works],
     [
       AC_TRY_RUN([
+#include <float.h>
 #include <math.h>
+/* Override the values of <float.h>, like done in float.in.h.  */
+#if defined __i386__ && (defined __BEOS__ || defined __OpenBSD__)
+# undef LDBL_MIN_EXP
+# define LDBL_MIN_EXP    (-16381)
+#endif
 extern long double frexpl (long double, int *);
 int main()
 {