[llvm-dev] Incrementally compiling LLVM

[Francesco Bertolaccini via llvm-dev]

On 16/04/2021 16:57, Stephen Neuendorffer wrote:
> Good point.  I don't think it's the same flow....sorry for the confusion.
> 
> Steve
> 
> 
> On Thu, Apr 15, 2021, 11:36 AM Mehdi AMINI <joker.eph at gmail.com
> <mailto:joker.eph at gmail.com>> wrote:
> 
>     Is it the same flow?
>     As far as I can tell you're not getting a build directory in order
>     to do an incremental rebuild with modified sources, but instead
>     getting the build artifacts in order to build a downstream project
>     entirely.
> 
>     The only way I can see incremental compilation to work would be to
>     get the entire source tree from the cache alongside with the build
>     tree, and then run `git fetch && git checkout <rev>`. This would
>     mark only the source file changed by git during the checkout.
>     Otherwise a fresh `git clone` will have the source files modified
>     data as the time of the checkout, so more recent than the cached
>     build dir.
> 
>     -- 
>     Mehdi
> 

Thanks guys, I finally figured it out. Caching the whole git repo +
build artifacts was the missing piece.

Cheers!

Francesco