UDC and libX11 ?

[Daniel Stone]

On Sat, Oct 15, 2005 at 10:04:13PM -0700, Jeremy C. Reed wrote:
> I also saw in libX11 configure:
> 
> if test xfalse = xtrue; then
>   UDC_TRUE=
>   UDC_FALSE='#'
> else
>   UDC_TRUE='#'
>   UDC_FALSE=
> fi
> 
> 
> What is the purpose of this?
> AM_CONDITIONAL(UDC, test xfalse = xtrue)
> 
> When can literal xfalse match literal xtrue?

'#if 0' will never positively evaluate, either ...
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