math.h warnings on MSVC

[Bruno Haible]

On MSVC 9, there are warnings about redefined macros in gnulib's <math.h>. This
fixes them.


2011-09-17  Bruno Haible  <address@hidden>

        math: Avoid macro redefinition warnings on MSVC.
        * lib/math.in.h (ceilf, ceill, floorf, floorl, frexpl, ldexpl):
        Undefine before redefining.

--- lib/math.in.h.orig  Sat Sep 17 17:13:13 2011
+++ lib/math.in.h       Sat Sep 17 16:29:49 2011
@@ -187,6 +187,7 @@
 #if @GNULIB_CEILF@
 # if @REPLACE_CEILF@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ceilf
 #   define ceilf rpl_ceilf
 #  endif
 _GL_FUNCDECL_RPL (ceilf, float, (float x));
@@ -222,6 +223,7 @@
 #if @GNULIB_CEILL@
 # if @REPLACE_CEILL@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef ceill
 #   define ceill rpl_ceill
 #  endif
 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
@@ -275,6 +277,7 @@
 #if @GNULIB_FLOORF@
 # if @REPLACE_FLOORF@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef floorf
 #   define floorf rpl_floorf
 #  endif
 _GL_FUNCDECL_RPL (floorf, float, (float x));
@@ -310,6 +313,7 @@
 #if @GNULIB_FLOORL@
 # if @REPLACE_FLOORL@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef floorl
 #   define floorl rpl_floorl
 #  endif
 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
@@ -339,6 +343,7 @@
    Store exp in *EXPPTR and return mantissa.  */
 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#  undef frexpl
 #  define frexpl rpl_frexpl
 # endif
 _GL_FUNCDECL_RPL (frexpl, long double,
@@ -368,6 +373,7 @@
 /* Return x * 2^exp.  */
 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#  undef ldexpl
 #  define ldexpl rpl_ldexpl
 # endif
 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
-- 
In memoriam Estella Agsteribbe <http://en.wikipedia.org/wiki/Estella_Agsteribbe>