Commit | Line | Data |
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f6ea5628 DJ |
1 | dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues. |
2 | ||
4c38e0a4 | 3 | dnl Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc. |
f6ea5628 DJ |
4 | dnl This file is free software; the Free Software Foundation |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
7 | ||
8 | dnl Written by Eric Blake. | |
9 | ||
10 | # wchar.m4 serial 4 | |
11 | ||
12 | AC_DEFUN([gl_WCHAR_H], | |
13 | [ | |
14 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
15 | AC_CACHE_CHECK([whether <wchar.h> is standalone], | |
16 | [gl_cv_header_wchar_h_standalone], | |
17 | [AC_COMPILE_IFELSE([[#include <wchar.h> | |
18 | wchar_t w;]], | |
19 | [gl_cv_header_wchar_h_standalone=yes], | |
20 | [gl_cv_header_wchar_h_standalone=no])]) | |
21 | if test $gl_cv_header_wchar_h_standalone != yes; then | |
22 | WCHAR_H=wchar.h | |
23 | fi | |
24 | ||
25 | dnl Prepare for creating substitute <wchar.h>. | |
26 | dnl Do it always: WCHAR_H may be empty here but can be set later. | |
27 | dnl Check for <wchar.h> (missing in Linux uClibc when built without wide | |
28 | dnl character support). | |
29 | AC_CHECK_HEADERS_ONCE([wchar.h]) | |
30 | if test $ac_cv_header_wchar_h = yes; then | |
31 | HAVE_WCHAR_H=1 | |
32 | else | |
33 | HAVE_WCHAR_H=0 | |
34 | fi | |
35 | AC_SUBST([HAVE_WCHAR_H]) | |
36 | gl_CHECK_NEXT_HEADERS([wchar.h]) | |
37 | ]) | |
38 | ||
39 | AC_DEFUN([gl_WCHAR_MODULE_INDICATOR], | |
40 | [ | |
41 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
42 | AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) | |
43 | GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1 | |
44 | ]) | |
45 | ||
46 | AC_DEFUN([gl_WCHAR_H_DEFAULTS], | |
47 | [ | |
48 | GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH]) | |
49 | dnl Assume proper GNU behavior unless another module says otherwise. | |
50 | HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH]) | |
51 | REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH]) | |
52 | WCHAR_H= | |
53 | AC_SUBST([WCHAR_H]) | |
54 | ]) |