Re: [PATCH] kbuild: lto: fix module versionings mismatch in incremental build

[Kees Cook]

On Mon, Jun 14, 2021 at 01:51:09PM +0800, Lecopzer Chen wrote:
> When building modules(CONFIG_...=m), I found some of module versions
> are incorrect and set to 0.
> This can be found in build log for first clean build which shows
> 
> WARNING: EXPORT symbol "XXXX" [drivers/XXX/XXX.ko] version generation failed, symbol will not be versioned.

I'm doing this, and I don't see the problem:

$ make LLVM=1 LLVM_IAS=1 distclean
$ make LLVM=1 LLVM_IAS=1 menuconfig
	*enable LTO*
	*enable a module*
$ make LLVM=1 LLVM_IAS=1 -j...

What series of commands (and .config) shows this for you?

-- 
Kees Cook