jhenderson added a comment.

In D149119#4331207 <https://reviews.llvm.org/D149119#4331207>, @ikudrin wrote:

> In D149119#4329274 <https://reviews.llvm.org/D149119#4329274>, @tmatheson 
> wrote:
>
>> LGTM, thank you for doing this. Please give it a couple of days in case 
>> others have comments.
>
> Thanks!
>
> In D149119#4329285 <https://reviews.llvm.org/D149119#4329285>, @jhenderson 
> wrote:
>
>> I've not really looked into this patch significantly, so this may well be 
>> addressed in the patch, given I see you have modified stuff to do with the 
>> NATIVE build, but in the past I have seen LLVM using its own tools to build 
>> other parts of its system. I believe it was using llvm-nm to extract the 
>> list of symbols needed for export, possibly to do with part of the clang 
>> build, possibly even using this script, I don't remember. The problem was 
>> that it was using the just-built version of llvm-nm, rather than 
>> specifically one from a release build. On a debug build this caused 
>> particularly slow builds for me, so much so that I stopped building the 
>> relevant parts of LLVM. Please don't introduce a similar situation/make the 
>> situation worse (it's quite possible this was fixed some time ago, but I 
>> haven't tried recently, nor do I remember the exact thing causing the 
>> issue): much like tablegen, any parts of the LLVM build that use just-built 
>> tools should make use of release builds, even in debug configuration, at 
>> least if an appropriate cmake option is specified.
>
> Your concerns are legit, but the tools in this patch follow the same 
> principle as `TableGen`, i.e. if `LLVM_OPTIMIZED_TABLEGEN` is `ON` then the 
> tools are forced to be built with optimization.

Thanks - that's fine with me (though raises the question as to whether we 
should be renaming that variable at some point...).


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D149119/new/

https://reviews.llvm.org/D149119

_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits

Reply via email to