floorl: Provide function definition on MSVC.

* m4/floorl.m4 (gl_FUNC_FLOORL_LIBS): Test also whether floorl can be
used as a function pointer.
* lib/math.in.h (floorl): Undefine if it is not declared as a function.

diff --git a/ChangeLog b/ChangeLog
index 5caea84..fc90f6d 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2012-02-24  Bruno Haible  <bruno@clisp.org>
 
+       floorl: Provide function definition on MSVC.
+       * m4/floorl.m4 (gl_FUNC_FLOORL_LIBS): Test also whether floorl can be
+       used as a function pointer.
+       * lib/math.in.h (floorl): Undefine if it is not declared as a function.
+
+2012-02-24  Bruno Haible  <bruno@clisp.org>
+
        ceilf: Provide function definition on MSVC.
        * m4/ceilf.m4 (gl_FUNC_CEILF_LIBS): Test also whether ceilf can be
        used as a function pointer.

diff --git a/lib/math.in.h b/lib/math.in.h
index e9421b3..d9db7c3 100644 (file)
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -495,6 +495,7 @@ _GL_FUNCDECL_RPL (floorl, long double, (long double x));
 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
 # else
 #  if !@HAVE_DECL_FLOORL@
+#   undef floorl
 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
 #  endif
 _GL_CXXALIAS_SYS (floorl, long double, (long double x));

diff --git a/m4/floorl.m4 b/m4/floorl.m4
index 5a6be0c..eb8c846 100644 (file)
--- a/m4/floorl.m4
+++ b/m4/floorl.m4
@@ -1,4 +1,4 @@
-# floorl.m4 serial 10
+# floorl.m4 serial 11
 dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -49,8 +49,9 @@ AC_DEFUN([gl_FUNC_FLOORL_LIBS],
            # define __NO_MATH_INLINES 1 /* for glibc */
            #endif
            #include <math.h>
+           long double (*funcptr) (long double) = floorl;
            long double x;]],
-         [[x = floorl(x);]])],
+         [[x = funcptr (x) + floorl(x);]])],
       [gl_cv_func_floorl_libm=])
     if test "$gl_cv_func_floorl_libm" = "?"; then
       save_LIBS="$LIBS"
@@ -61,8 +62,9 @@ AC_DEFUN([gl_FUNC_FLOORL_LIBS],
              # define __NO_MATH_INLINES 1 /* for glibc */
              #endif
              #include <math.h>
+             long double (*funcptr) (long double) = floorl;
              long double x;]],
-           [[x = floorl(x);]])],
+           [[x = funcptr (x) + floorl(x);]])],
         [gl_cv_func_floorl_libm="-lm"])
       LIBS="$save_LIBS"
     fi