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List:       kde-devel
Subject:    Re: How should application code check for Arrays of Variable Length?
From:       Erik Sigra <sigra () home ! se>
Date:       2003-04-02 16:51:05
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Wednesday 02 April 2003 18.00 skrev Erik Sigra:
> AC_DEFUN([AC_C_VARARRAYS],
> [
>   AC_CACHE_CHECK([for variable-length arrays],
>     ac_cv_c_vararrays,
>     [AC_TRY_COMPILE(
>        [],
>        [static int x; char a[++x]; a[sizeof a - 1] = 0; return a[0];],
>        ac_cv_c_vararrays=yes,
>        ac_cv_c_vararrays=no)])
>   if test $ac_cv_c_vararrays = yes; then
>     AC_DEFINE(HAVE_C_VARARRAYS, 1,
>       [Define to 1 if C supports variable-length arrays.])
>   fi
> ])

I added both the code above and "AC_C_VARARRAYS" to configure.in and it seems 
to work. But shouldn't I tell it somewhere that it is C++, not C? (In case 

And does anybody know where to find a standard check for a working Ada 
compiler? And how to make the descending into a subdirectiry depend on the 
result of that check?

I have looked for KDE-documentation about this kind of thing but found 
nothing.
 
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