libc++abi fails to compile on arm when build against libgcc's arm unwind with: cxa_personality.cpp:594:30: error: ‘_URC_FATAL_PHASE2_ERROR’ was not declared in this scope

[Quuxplusone]

Bugzilla Link	PR39249
Status	NEW
Importance	P enhancement
Reported by	Steffen Kuhn (herrtimson@yahoo.de)
Reported on	2018-10-10 23:59:52 -0700
Last modified on	2018-10-14 11:16:42 -0700
Version	7.0
Hardware	PC Linux
CC	llvm-bugs@lists.llvm.org, mclow.lists@gmail.com, mgorny@gentoo.org
Fixed by commit(s)
Attachments	0001-in-addition-to-pr35945.patch (1256 bytes, text/plain) libcxxabi-7.0.0-gcc.gz (4065 bytes, application/gzip)
Blocks
Blocked by
See also

Created attachment 20987
patch to fix this bug

This is follow-up of https://bugs.llvm.org/show_bug.cgi?id=35945, which reports
that libc++ doesn't build for the Raspberry PI.

Errors related to char[8] are fixed now, but there are some missing values from
_Unwind_Reason_Code enum and wrong behavior of  _US_FORCE_UNWIND

I isolated the added lines (with permission) from this fedora patch:
https://src.fedoraproject.org/rpms/v8/blob/master/f/v8-6.7.17-fix-gcc-unwind-header.patch

https://reviews.llvm.org/D53127

please assign mgorny@gentoo.org, he agreed to help out if there are unforeseen
problems with this patch.

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Attached 0001-in-addition-to-pr35945.patch (1256 bytes, text/plain): patch to fix this bug

[Quuxplusone]

This fix and the fix for https://bugs.llvm.org/show_bug.cgi?id=35945 should be included into upcoming 7.0.1 and 6.0.2 (if there will be one)

[Quuxplusone]

I've said this on the review, but I want to say it here too - this doesn't have anything to do with being built with gcc.

this has to do with using gcc's ARM unwind library.

[Quuxplusone]

I tried to be more precise with the title, okay for you?

Or do you think that this is actually a bug within gcc's implementation of unwind on arm?

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Attached libcxxabi-7.0.0-gcc.gz (4065 bytes, application/gzip): compressed build log