RE: msys : convert datadir to windows directory syntax

[Duft Markus]

Hi!

I copied that macro from some autoconf macro archive or so, so i didn't
write it. Goolge for AC_DEFINE_DIR, it should be the first match -
that's where i got it from ;o)

Cheers, Markus

Keith MARSHALL <> wrote:
> Markus Duft wrote:
>> I found a comment in some macro i used to use some time ago (to
>> define directories). It seems that since autoconf 2.60 $datadir
>> contains $datarootdir, so either use $datarootdir directly, or
>> change the MSYS_... Macro to do an eval on that variable, so it gets
>> resolved. 
> 
> No, you should not do that.
> 
>> ...
>> dnl In Autoconf 2.60, ${datadir} refers to ${datarootdir}, which in
>> turn dnl refers to ${prefix}.  Thus we have to use `eval' twice.
>>   eval ac_define_dir="\"[$]$2\""
>>   eval ac_define_dir="\"$ac_define_dir\""
>> ...
> 
> This sort of shennanigans suggests an abuse of (the intent of) these
> variables; if you find yourself doing this, you are probably doing
> something wrong.
> 
> My earlier post suggests a more robust solution, (although it is still
> afflicted by an undesirable dependence on undocumented behaviour).
> 
> Regards,
> Keith.
> 
> 
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