[clang] [OffloadBundler] Compress bundles over 4GB (PR #122307)

[Yaxun Liu via cfe-commits]

yxsamliu wrote:

> I've never been a fan of this type of implicit behavior, since it will change spuriously depending on what the user wants.
> 
> I also wonder if we couldn't do something similar with ELF compression so we don't need to manually do all this stuff.

Linux only supports compressed debug info sections.

The env var is for debugging purpose only. After runtime support is mature, we will remove the env var and also eventually remove support of generation of old versions of compressed bundle format.

https://github.com/llvm/llvm-project/pull/122307