X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=m4%2Fisnanf.m4;h=388e6c049c3b53248dd903367ff25a9950af09a9;hb=606dd130bdce412935eca78598923720a7e346c4;hp=03ab66b1e8248b12cfe9a138f6253db6e1cc9866;hpb=5459c1d28604293ebb0dcf929b72410b00263709;p=gnulib.git

diff --git a/m4/isnanf.m4 b/m4/isnanf.m4
index 03ab66b1e..388e6c049 100644
--- a/m4/isnanf.m4
+++ b/m4/isnanf.m4
@@ -1,4 +1,4 @@
-# isnanf.m4 serial 2
+# isnanf.m4 serial 4
 dnl Copyright (C) 2007 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -13,7 +13,11 @@ AC_DEFUN([gl_FUNC_ISNANF_NO_LIBM],
     gl_ISNANF_WORKS
   fi
   if test $gl_cv_func_isnanf_no_libm = yes \
-     && test $gl_cv_func_isnanf_works = yes; then
+     && { case "$gl_cv_func_isnanf_works" in
+            *yes) true;;
+            *) false;;
+          esac
+        }; then
     AC_DEFINE([HAVE_ISNANF_IN_LIBC], 1,
       [Define if the isnan(float) function is available in libc.])
   else
@@ -46,7 +50,7 @@ AC_DEFUN([gl_ISNANF_WORKS],
 [
   AC_REQUIRE([AC_PROG_CC])
   AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
-  AC_CACHE_CHECK([whether isnanf works], [gl_cv_func_isnanf_works],
+  AC_CACHE_CHECK([whether isnan(float) works], [gl_cv_func_isnanf_works],
     [
       AC_TRY_RUN([
 #include <math.h>
@@ -153,7 +157,7 @@ int main ()
         ],
         [gl_cv_cc_float_expbit0=`cat conftest.out`],
         [gl_cv_cc_float_expbit0="unknown"],
-        [gl_cv_cc_double_expbit0="word 0 bit 23"])
+        [gl_cv_cc_float_expbit0="word 0 bit 23"])
       rm -f conftest.out
     ])
   case "$gl_cv_cc_float_expbit0" in