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[Bug bootstrap/65733] gcc 4.9.2 suffers bootstrap comparison failures with clang 3.5.1 and later.
- From: "howarth.at.gcc at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 11 Apr 2015 17:12:37 +0000
- Subject: [Bug bootstrap/65733] gcc 4.9.2 suffers bootstrap comparison failures with clang 3.5.1 and later.
- Auto-submitted: auto-generated
- References: <bug-65733-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65733
--- Comment #12 from Jack Howarth <howarth.at.gcc at gmail dot com> ---
It appears that clang 3.5 and later defaults to setting the CIE version to
dwarf2 in the absence of -g. This behavior can't be overridden by passing
-gdwarf-3 in the absence of -g. However the gcc configure test failure can be
suppressed under clang by appending -gdwarf-2 instead (to downgrade the CIE
version to dwarf3 in the presence of -g).