[ATfE] 20.1.0-ATfE --compress-debug-sections issue

[sachinpundkar]

Hi ARM,
We are using -Wl,--compress-debug-sections=zlib option, because of this option our elf size is significantly less.
This option was working fine with 20.0.0, but with latest version we are getting below error:
"error: --compress-debug-sections: LLVM was not built with LLVM_ENABLE_ZLIB or did not find zlib at build time"

If possible please consider this option for prebuilt binary packages.

[smithp35]

I've raised an internal ticket to see if we can add zlib for our next LLVM 21 release, at least for Mac and Linux.

We wanted to minimise the third-party dependencies as support across all the supported platforms varies. All the supported linux distros and MacOS have libzlib.so preinstalled, although I don't think Windows does. Static-linking is a possibility although this means effiectively redistributing zlib which affects the licenses of the toolchain.