This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: [PATCH] prune warn_compact_unwind warnings on darwin
On 19 Mar 2011, at 06:22, Mike Stump wrote:
On Mar 12, 2011, at 1:01 PM, Jack Howarth wrote:
Xcode 4.0's linker now defaults on...
-warn_compact_unwind
So, if this is a flag, and we can turn the warning off, and we truly
don't care about the warnings, why not just use -
no_warn_compact_unwind? That would be preferable, I think.
1/
Hm. AFAIK we set "-no_compact_unwind", when the target is 10.6
#define LINK_GCC_C_SEQUENCE_SPEC \
"%:version-compare(>= 10.6 mmacosx-version-min= -no_compact_unwind) \
- it would seem to be a tool bug to flag a warning for something
specifically excluded.
2/
unless "-no_compact_unwind" is now ignored?
3/
maybe we are going to have to follow clang et. al in having a tools
version runtime flag (this would especially ease the issues in making
canadians to early Darwin versions). OSX ld and cctools version are
detectable at runtime for native builds - say: -mmacosx-ld-version= -
mmacosx-cctools-version= ... so we don't ask people to put this for
the native case (we can also pick sensible defaults for other
systems). [trunk clang uses -target-linker-version xx.yy.zz - but
that's not consistent with our general scheme].
(I know Mike hates additional flags - and tool capabilities can, of
course, be detected at runtime for native builds - but we also cater -
by design - for cross-builds to earlier versions of the OS)
cheers
Iain