2008-04-14 18:05:12 +00:00
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dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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2010-01-01 07:32:07 +00:00
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dnl Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc.
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2008-04-14 18:05:12 +00:00
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Written by Eric Blake.
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# wchar.m4 serial 4
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AC_DEFUN([gl_WCHAR_H],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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AC_CACHE_CHECK([whether <wchar.h> is standalone],
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[gl_cv_header_wchar_h_standalone],
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[AC_COMPILE_IFELSE([[#include <wchar.h>
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wchar_t w;]],
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[gl_cv_header_wchar_h_standalone=yes],
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[gl_cv_header_wchar_h_standalone=no])])
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if test $gl_cv_header_wchar_h_standalone != yes; then
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WCHAR_H=wchar.h
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fi
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dnl Prepare for creating substitute <wchar.h>.
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dnl Do it always: WCHAR_H may be empty here but can be set later.
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dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
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dnl character support).
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AC_CHECK_HEADERS_ONCE([wchar.h])
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if test $ac_cv_header_wchar_h = yes; then
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HAVE_WCHAR_H=1
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else
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HAVE_WCHAR_H=0
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fi
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AC_SUBST([HAVE_WCHAR_H])
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gl_CHECK_NEXT_HEADERS([wchar.h])
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])
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AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
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[
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dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
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])
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AC_DEFUN([gl_WCHAR_H_DEFAULTS],
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[
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GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
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dnl Assume proper GNU behavior unless another module says otherwise.
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HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
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REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
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WCHAR_H=
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AC_SUBST([WCHAR_H])
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])
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