futimens: new module

[gnulib.git] / m4 / printf-frexpl.m4

diff --git a/m4/printf-frexpl.m4 b/m4/printf-frexpl.m4
index 6c74e9b..f2eb200 100644 (file)
--- a/m4/printf-frexpl.m4
+++ b/m4/printf-frexpl.m4
@@ -1,5 +1,5 @@
-# printf-frexpl.m4 serial 4
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# printf-frexpl.m4 serial 6
+dnl Copyright (C) 2007, 2009 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.
@@ -9,6 +9,7 @@ dnl Check how to define printf_frexpl() without linking with libm.
 AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  dnl Subset of gl_FUNC_FREXPL_NO_LIBM.
   AC_CACHE_CHECK([whether frexpl can be used without linking with libm],
     [gl_cv_func_frexpl_no_libm],
     [
@@ -20,7 +21,18 @@ AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
         [gl_cv_func_frexpl_no_libm=no])
     ])
   if test $gl_cv_func_frexpl_no_libm = yes; then
-    AC_DEFINE([HAVE_FREXPL_IN_LIBC], 1,
+    gl_FUNC_FREXPL_WORKS
+    case "$gl_cv_func_frexpl_works" in
+      *yes) gl_func_frexpl_no_libm=yes ;;
+      *)    gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;;
+    esac
+  else
+    gl_func_frexpl_no_libm=no
+    dnl Set REPLACE_FREXPL here because the system may have frexpl in libm.
+    REPLACE_FREXPL=1
+  fi
+  if test $gl_func_frexpl_no_libm = yes; then
+    AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1],
       [Define if the frexpl function is available in libc.])
     dnl Also check whether it's declared.
     dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
@@ -41,7 +53,7 @@ AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
     gl_FUNC_LDEXPL_WORKS
     case "$gl_cv_func_ldexpl_works" in
       *yes)
-        AC_DEFINE([HAVE_LDEXPL_IN_LIBC], 1,
+        AC_DEFINE([HAVE_LDEXPL_IN_LIBC], [1],
           [Define if the ldexpl function is available in libc.])
         dnl Also check whether it's declared.
         dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.