35 lines
1,007 B
Plaintext
35 lines
1,007 B
Plaintext
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# iswblank.m4 serial 5
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dnl Copyright (C) 2011-2023 Free Software Foundation, Inc.
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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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AC_DEFUN([gl_FUNC_ISWBLANK],
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[
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AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
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AC_REQUIRE([gl_WCTYPE_H])
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dnl Persuade glibc <wctype.h> to declare iswblank().
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AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_FUNCS_ONCE([iswblank])
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AC_CHECK_DECLS([iswblank], , , [[
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#include <wchar.h>
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#include <wctype.h>
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]])
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if test $ac_cv_func_iswblank = no; then
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HAVE_ISWBLANK=0
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if test $ac_cv_have_decl_iswblank = yes; then
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REPLACE_ISWBLANK=1
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fi
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fi
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if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
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dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
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:
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else
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if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
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dnl Redefine only iswblank.
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:
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fi
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fi
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])
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