49 lines
1017 B
Plaintext
49 lines
1017 B
Plaintext
dnl That code is public domain and can be freely used or copied.
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dnl Originally snatched from somewhere...
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dnl Macro for checking if va_list is an array
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dnl Usage: AC_C_VA_LIST_AS_ARRAY
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dnl call AC_DEFINE for HAVE_VA_LIST_AS_ARRAY
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dnl if for this architecture va_list is defined as an array
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AC_DEFUN([AC_C_VA_LIST_AS_ARRAY],
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[
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AC_MSG_CHECKING([whether va_list is defined as an array])
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AC_CACHE_VAL([ac_cv_valistasarray],
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[AC_TRY_RUN(
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[
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#include <stdlib.h>
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#include <stdarg.h>
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void foo(int i, ...)
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{
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va_list ap1, ap2;
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va_start(ap1, i);
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ap2 = ap1;
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if (va_arg(ap2, int) != 123 || va_arg(ap1, int) != 123)
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exit(1);
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va_end(ap1);
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}
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int main(void)
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{
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foo(0, 123);
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return(0);
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}
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],
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[ac_cv_valistasarray="no"],
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[ac_cv_valistasarray="yes"],
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[ac_cv_valistasarray="no"]
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)])
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AC_MSG_RESULT($ac_cv_valistasarray)
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if test "x${ac_cv_valistasarray}" = "xyes" ; then
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AC_DEFINE([HAVE_VA_LIST_AS_ARRAY], [1], [Define to 1 if va_list is an array])
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fi
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])
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dnl End of ac_valist.m4
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