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libmissing/m4/signed.m4

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# signed.m4 serial 2

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dnl Copyright (C) 2001-2002, 2006 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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dnl From Bruno Haible.

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AC_DEFUN([bh_C_SIGNED],

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[

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  AC_CACHE_CHECK([for signed], bh_cv_c_signed,

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   [AC_TRY_COMPILE(, [signed char x; return !x;],

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      bh_cv_c_signed=yes, bh_cv_c_signed=no)])

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  if test $bh_cv_c_signed = no; then

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    AC_DEFINE(signed, ,

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              [Define to empty if the C compiler doesn't support this keyword.])

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  fi

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])

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