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| 1 | # signed.m4 serial 2
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| 2 | dnl Copyright (C) 2001-2002, 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 | dnl From Bruno Haible.
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| 8 |
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| 9 | AC_DEFUN([bh_C_SIGNED],
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| 10 | [
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| 11 | AC_CACHE_CHECK([for signed], bh_cv_c_signed,
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| 12 | [AC_TRY_COMPILE(, [signed char x; return !x;],
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| 13 | bh_cv_c_signed=yes, bh_cv_c_signed=no)])
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| 14 | if test $bh_cv_c_signed = no; then
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| 15 | AC_DEFINE(signed, ,
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| 16 | [Define to empty if the C compiler doesn't support this keyword.])
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| 17 | fi
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| 18 | ])
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