Opened 6 years ago

Closed 5 years ago

#57780 closed defect (fixed)

clang-5.0 with +emulated_tls and older ld64 gives warning: could not create compact unwind for __ZTW5tlojb: non-standard register 1 being saved in prolog

Reported by: kencu (Ken) Owned by: jeremyhu (Jeremy Huddleston Sequoia)
Priority: Normal Milestone:
Component: ports Version:
Keywords: Cc: kencu (Ken), mojca (Mojca Miklavec)
Port: clang-5.0

Description

this seems to occur (so far) on 10.6.8 updated to the clang-5.0 with +emulated_tls.

My testing this morning suggests it doesn't occur with ld64 +236 or ld64-latest (which are the ones I mostly use).

The solution is to install ld64-236 and enable that:

sudo port -v install ld64 +ld64_236

Or install ld64-latest and use that. Installing ld64-latest is a bit backward. You install ld64 with all the default variants specifically disabled to get the latest one, which at first I found a bit strange:

sudo port -v install ld64 -ld64-97 -ld64_127 -ld64_236 -ld64_xcode

We have known for a while there is going to be a linker update issue at some point with 10.6.8 that would probably require a manual step to overcome.

Have to think this fully through to see how we might automate the update to the newer linker on these older systems. Mojca and I have discussed this before.

Leaving this ticket here for anyone who might bump into this error in the meantime.

Change History (1)

comment:1 Changed 5 years ago by kencu (Ken)

Resolution: fixed
Status: assignedclosed

somewhere along the line, this has been fixed and no longer occurs.

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