mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-09-08 06:39:21 -04:00
39 lines
1.3 KiB
Plaintext
39 lines
1.3 KiB
Plaintext
dnl @synopsis AX_DECL_WCHAR_MAX
|
|
dnl
|
|
dnl Checks whether the system headers define WCHAR_MAX or not. If it is
|
|
dnl already defined, does nothing. Otherwise checks the size and signedness
|
|
dnl of `wchar_t', and defines WCHAR_MAX to the maximum value that can be
|
|
dnl stored in a variable of type `wchar_t'.
|
|
dnl
|
|
dnl @version 1.1
|
|
dnl @author Ville Laurikari <vl@iki.fi>
|
|
dnl
|
|
AC_DEFUN([AX_DECL_WCHAR_MAX], [
|
|
AC_CACHE_CHECK([whether WCHAR_MAX is defined], ax_cv_decl_wchar_max, [
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM([
|
|
#ifdef HAVE_WCHAR_H
|
|
#include <wchar.h>
|
|
#endif
|
|
], [WCHAR_MAX])],
|
|
[ax_cv_decl_wchar_max="yes"],
|
|
[ax_cv_decl_wchar_max="no"])])
|
|
if test $ax_cv_decl_wchar_max = "no"; then
|
|
AX_CHECK_SIGN([wchar_t],
|
|
[ wc_signed="yes"
|
|
AC_DEFINE(WCHAR_T_SIGNED, 1, [Define if wchar_t is signed]) ],
|
|
[ wc_signed="no"
|
|
AC_DEFINE(WCHAR_T_UNSIGNED, 1, [Define if wchar_t is unsigned])], [
|
|
#ifdef HAVE_WCHAR_H
|
|
#include <wchar.h>
|
|
#endif
|
|
])
|
|
if test "$wc_signed" = "yes"; then
|
|
AC_DEFINE(WCHAR_MAX, [(1L << (sizeof(wchar_t) * 8 - 1) - 1)], [
|
|
Define to the maximum value of wchar_t if not already defined elsewhere])
|
|
elif test "$wc_signed" = "no"; then
|
|
AC_DEFINE(WCHAR_MAX, [(1L << (sizeof(wchar_t) * 8) - 1)])
|
|
fi
|
|
fi
|
|
])dnl
|