[llvm-dev] Incrementally compiling LLVM

[Francesco Bertolaccini via llvm-dev]

On 15/04/2021 20:36, Mehdi AMINI wrote:
> 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.
> 

Thanks, this seems to be the crucial piece of info I was missing. I was
under the impression that something like the hashes of the files were
taken into account, not the last edit time. I'll experiment with this.

Francesco