| 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 4 |
| |
| AC_DEFUN([gl_WCHAR_H], |
| [ |
| AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
| 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=wchar.h |
| fi |
| |
| dnl Prepare for creating substitute <wchar.h>. |
| dnl Do it always: WCHAR_H may be empty here but can be set later. |
| 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]) |
| ]) |
| |
| AC_DEFUN([gl_WCHAR_MODULE_INDICATOR], |
| [ |
| dnl Use AC_REQUIRE here, so that the default settings are expanded once only. |
| AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) |
| GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1 |
| ]) |
| |
| AC_DEFUN([gl_WCHAR_H_DEFAULTS], |
| [ |
| GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH]) |
| dnl Assume proper GNU behavior unless another module says otherwise. |
| HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH]) |
| REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH]) |
| WCHAR_H= |
| AC_SUBST([WCHAR_H]) |
| ]) |