unknown -z value: common-page-size=4096

[Dimitry Andric]

On 29 Sep 2018, at 04:08, Shawn Webb <shawn.webb at hardenedbsd.org> wrote:
> 
> On Fri, Sep 28, 2018 at 10:01:31PM -0400, Charlie Li wrote:
>> I've switched to using devel/xtoolchain-llvm70 yesterday to build amd64
>> base starting with r338990, and among other issues, ld.lld70 refuses to
>> link the kernel:
>> 
>> Building /usr/local/obj/usr/local/src/amd64.amd64/sys/ARDMORE/kernel.full
>> --- kernel.full ---
>> linking kernel.full
>> ld.lld: error: unknown -z value: common-page-size=4096
>> ld.lld: error: unknown -z value: ifunc-noplt
>> *** [kernel.full] Error code 1
>> 
>> make[2]: stopped in /usr/local/obj/usr/local/src/amd64.amd64/sys/ARDMORE
>> 
>> (ARDMORE is basically GENERIC-NODEBUG, not that it matters)
>> 
>> The ifunc-noplt is a known issue, it obviously didn't make it upstream
>> in time for LLVM 7.0.0, and thus we carry the feature downstream.
>> 
>> The crux of this link error though, emaste@ quipped in PR 230604 that
>> LLD prior to 7.0.0 accepted but ignored unknown options, but now at
>> least 7.0.0 disallows unknown options entirely. Which brings up the -z
>> common-page-size=4096: has LLD been ignoring this part the whole time,
>> and is it of any meaningful use anymore (it seemed to mean something
>> with bfd)?
> 
> I noticed the same issues. I reverted parts of recent work by upstream
> FreeBSD in HardenedBSD's Cross-DSO CFI branch since that branch uses
> clang/llvm/lld 7.0.0.

You can apply this changeset from the clang700-import branch:

https://svnweb.freebsd.org/changeset/base/337325

or just use the clang700-import branch wholesale. :-)

-Dimitry

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