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| 1 | # wcwidth.m4 serial 6
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| 2 | dnl Copyright (C) 2006 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_DEFUN([gl_FUNC_WCWIDTH],
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| 8 | [
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| 9 | dnl Persuade glibc <wchar.h> to declare wcwidth().
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| 10 | AC_REQUIRE([AC_GNU_SOURCE])
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| 11 |
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| 12 | AC_REQUIRE([AC_C_INLINE])
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| 13 | AC_REQUIRE([gt_TYPE_WCHAR_T])
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| 14 | AC_REQUIRE([gt_TYPE_WINT_T])
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| 15 |
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| 16 | AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
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| 17 | AC_CHECK_FUNCS_ONCE([iswprint wcwidth])
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| 18 |
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| 19 | AC_CHECK_DECLS([wcwidth], [], [], [
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| 20 | /* AIX 3.2.5 declares wcwidth in <string.h>. */
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| 21 | #include <string.h>
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| 22 | #if HAVE_WCHAR_H
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| 23 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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| 24 | <wchar.h>.
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| 25 | BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
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| 26 | <wchar.h>. */
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| 27 | # include <stdio.h>
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| 28 | # include <time.h>
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| 29 | # include <wchar.h>
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| 30 | #endif
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| 31 | ])])
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