[Bug target/60563] FAIL: g++.dg/ext/sync-4.C on *-apple-darwin*

[iains at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60563

--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> ---
sadly, this seems to be a ld64 bug - present when using uncompressed EH (which
is the default for GCC on darwin).

If I manually enable compressed EH (which is the default now for the platform)
the test passes.

Will investigate whether we can yet enable compressed EH for all of GCC; it's
possible that we still emit too many other constructs that break the ld64 atom
model.

A work-around for this issue is:
{ dg-additional-options "-fno-align-functions" { target { *-*-darwin* } } }

with a FIXME comment that this is catering for an external tool bug (as usual,
we cannot expect ld64 to be fixed on any darwin < 13).