1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
|
dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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,
dnl with or without modifications, as long as this notice is preserved.
dnl Written by Eric Blake.
# wchar.m4 serial 3
AC_DEFUN([gl_WCHAR_H],
[
AC_CACHE_CHECK([whether <wchar.h> is standalone],
[gl_cv_header_wchar_h_standalone],
[AC_COMPILE_IFELSE([[#include <wchar.h>
wchar_t w;]],
[gl_cv_header_wchar_h_standalone=yes],
[gl_cv_header_wchar_h_standalone=no])])
if test $gl_cv_header_wchar_h_standalone = yes; then
WCHAR_H=
else
dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
dnl character support).
AC_CHECK_HEADERS_ONCE([wchar.h])
if test $ac_cv_header_wchar_h = yes; then
HAVE_WCHAR_H=1
else
HAVE_WCHAR_H=0
fi
AC_SUBST([HAVE_WCHAR_H])
gl_CHECK_NEXT_HEADERS([wchar.h])
WCHAR_H=wchar.h
fi
AC_SUBST([WCHAR_H])
])
|