ldexpl: Fix link error on HP-UX 11.

* m4/ldexpl.m4 (gl_FUNC_LDEXPL): When replacing ldexpl, set
LDEXPL_LIBM, using $ISNANL_LIBM.

diff --git a/ChangeLog b/ChangeLog
index 0821c98ee689ca6d4c4becc78c20d421f8751fa5..c5e4086433e9de416ccc6c6198208c7e9958f46b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-31  Bruno Haible  <bruno@clisp.org>
+
+       ldexpl: Fix link error on HP-UX 11.
+       * m4/ldexpl.m4 (gl_FUNC_LDEXPL): When replacing ldexpl, set
+       LDEXPL_LIBM, using $ISNANL_LIBM.
+
 2010-12-31  Eric Blake  <eblake@redhat.com>
 
        ftello: avoid compilation failure with SunStudio c89

diff --git a/m4/ldexpl.m4 b/m4/ldexpl.m4
index 1399b1b6735417e2753bfeddc99c5a4601addb88..dca1565c25081b98dd6ca2065513ea03d18ad46b 100644 (file)
--- a/m4/ldexpl.m4
+++ b/m4/ldexpl.m4
@@ -1,4 +1,4 @@
-# ldexpl.m4 serial 9
+# ldexpl.m4 serial 10
 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,6 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_LDEXPL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_ISNANL]) dnl for ISNANL_LIBM
   dnl Check whether it's declared.
   dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
   AC_CHECK_DECL([ldexpl], , [HAVE_DECL_LDEXPL=0], [#include <math.h>])
@@ -40,7 +41,7 @@ AC_DEFUN([gl_FUNC_LDEXPL],
       LIBS="$save_LIBS"
       case "$gl_cv_func_ldexpl_works" in
         *yes) gl_func_ldexpl=yes ;;
-        *)    gl_func_ldexpl=no; REPLACE_LDEXPL=1; LDEXPL_LIBM= ;;
+        *)    gl_func_ldexpl=no; REPLACE_LDEXPL=1 ;;
       esac
     else
       gl_func_ldexpl=no
@@ -52,6 +53,7 @@ AC_DEFUN([gl_FUNC_LDEXPL],
   fi
   if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then
     AC_LIBOBJ([ldexpl])
+    LDEXPL_LIBM="$ISNANL_LIBM"
   fi
   AC_SUBST([LDEXPL_LIBM])
 ])