[llvm-dev] [RFC] No longer look up bugpoint tools in PATH?

[Fedor Sergeev via llvm-dev]

 > On the patch Davide Italiano mentions that he's always found it 
strange that bugpoint looks in the PATH at all!
Thats my impression as well!
Would be nice to remove that, saves some keystrokes (though now I do it 
subconsciously ;) ).

regards,
   Fedor.


On 11/30/18 5:27 PM, Brian Gesiak via llvm-dev wrote:
> Hello all,
>
> Earlier this week I sent up https://reviews.llvm.org/D54884, which 
> changes how bugpoint finds executables it relies upon to reduce 
> programs. Specifically:
>
> - Before: bugpoint would only look for 'opt' in the user's PATH
> - After: bugpoint looks for 'opt' in the user's PATH, and if it 
> doesn't find it, looks for 'opt' in the same directory as the bugpoint 
> executable
>
> I made this change because it saves me keystrokes: I always use 
> bugpoint from a source build, and so it's always placed in a build 
> directory next to opt. By searching there, I no longer need to pass it 
> the --opt-command option. I noticed that tools like Clang & lld behave 
> this way as well.
>
> On the patch Davide Italiano mentions that he's always found it 
> strange that bugpoint looks in the PATH at all! So I'm wondering: 
> should I modify my patch to change bugpoint's behavior, and no longer 
> have it look up tools like 'opt' in the user PATH? On the one hand, I 
> think people like Davide would find this more intuitive. On the other, 
> I notice bugpoint also relies on tools like valgrind, which are 
> typically not placed in the same build folder as LLVM tools, so those 
> might be harder to look up and find.
>
> I'm looking for people who use bugpoint regularly to respond with 
> their own examples and use cases, to better inform me about how 
> bugpoint should behave. Please let me know which PATH lookup behavior 
> makes the most sense to you!
>
> Thanks!
>
> - Brian Gesiak
>
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