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Re: [PATCH v5 2/3] Makefile: add Perl runtime prefix support




Johannes Schindelin <Johannes.Schindelin@xxxxxx> writes:

> On Mon, 8 Jan 2018, Dan Jacques wrote:
>
>> On Mon, 08 Jan 2018, Ævar Arnfjörð Bjarmason replied:
>> 
>> >>+# it. This is intentionally separate from RUNTIME_PREFIX so that
>> >>notably Windows +# can hard-code Perl library paths while still
>> >>enabling RUNTIME_PREFIX +# resolution.
>> >
>> > Maybe we covered this in previous submissions, but refresh my memory,
>> > why is the *_PERL define still needed? Reading this explanation
>> > doesn't make sense to me, but I'm probably missing something.
>> >
>> > If we have a system where we have some perl library paths on the
>> > system we want to use, then they'll still be in @INC after our 'use
>> > lib'-ing, so we'll find libraries there.
>> >
>> > The only reason I can think of for doing this for C and not for Perl
>> > would be if you for some reason want to have a git in /tmp/git but
>> > then use a different version of the Git.pm from some system install,
>> > but I can't imagine why.
>> 
>> The reason is entirely due to the way Git-for-Windows is structured. In
>> Git-for-Windows, Git binaries are run directly from Windows, meaning
>> that they require RUNTIME_PREFIX resolution. However, Perl scripts are
>> run from a MinGW universe, within which filesystem paths are fixed.
>> Therefore, Windows Perl scripts don't require a runtime prefix
>> resolution.
>
> As I mentioned in the mail I just finished and sent (I started it hours
> ago, but then got busy with other things while the builds were running): I
> am totally cool with changing this on Windows, too. Should simplify
> things, right?

Wonderful to see that you two are in agreement.  Will look forward
to see a simplified solution in a later round ;-)