1dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues. 2 3dnl Copyright (C) 2007 Free Software Foundation, Inc. 4dnl This file is free software; the Free Software Foundation 5dnl gives unlimited permission to copy and/or distribute it, 6dnl with or without modifications, as long as this notice is preserved. 7 8dnl Written by Eric Blake. 9 10# wchar.m4 serial 1 11 12AC_DEFUN([gl_WCHAR_H], 13[ 14 AC_CACHE_CHECK([whether <wchar.h> is standalone], 15 [gl_cv_header_wchar_h_standalone], 16 [AC_COMPILE_IFELSE([[#include <wchar.h> 17wchar_t w;]], 18 [gl_cv_header_wchar_h_standalone=yes], 19 [gl_cv_header_wchar_h_standalone=no])]) 20 if test $gl_cv_header_wchar_h_standalone = yes; then 21 WCHAR_H= 22 else 23 gl_ABSOLUTE_HEADER([wchar.h]) 24 ABSOLUTE_WCHAR_H=\"$gl_cv_absolute_wchar_h\" 25 WCHAR_H=wchar.h 26 fi 27 AC_SUBST([ABSOLUTE_WCHAR_H]) 28 AC_SUBST([WCHAR_H]) 29]) 30