> On 7 Nov 2016, at 09:51, Mike Stump <mikest...@comcast.net> wrote: > > [ possible dup ] > >> Begin forwarded message: >> >> From: Mike Stump <m...@mrs.kithrup.com> >> Subject: Re: [PATCH fix PR71767 2/4 : Darwin configury] Arrange for ld64 to >> be detected as Darwin's linker >> Date: November 7, 2016 at 9:48:53 AM PST >> To: Iain Sandoe <iain_san...@mentor.com> >> Cc: GCC Patches <gcc-patches@gcc.gnu.org>, Jeff Law <l...@redhat.com> >> >> On Nov 6, 2016, at 11:39 AM, Iain Sandoe <iain_san...@mentor.com> wrote: >>> This is an initial patch in a series that converts Darwin's configury to >>> detect ld64 features, rather than the current process of hard-coding them >>> on target system version. >> >> So, I really do hate to ask, but does this have to be a config option? >> Normally, we'd just have configure examine things by itself. For canadian >> crosses, there should be enough state present to key off of directly, >> specially if they are wired up to work. >> >> I've rather have the thing that doesn't just work without that config flag, >> just work. I'd like to think I can figure how how to make it just work, if >> given an idea of what doesn't actually work. >> >> Essentially, you do the operation that doesn't work, detect it failed to >> work, then the you know it didn't work.
Well, if you can run the tool, that’s fine - I wanted to cover the base where we have a native or canadian that’s using a newer ld64 than is installed by the ‘last available xcode’ on a given platform - which is the common case (since the older versions of ld64 in particular don’t really support the features we want, they def. won’t support building LLVM for ex.). I am *really really* trying to get away from the assumption that darwinNN implies some ld64 capability - because that’s just wrong, really - makes way too many assuptions. I also want to get to the “end game” that we just configure *-*-darwin and use the cross-capability of the toolchain (we’re a ways away from that upstream, but my local patch set acheives it at least for 5.4 and 6.2). It’s true that adding configure options is not #1 choice in life - but I think darwin is getting to the stage where there are too many choices to cover without. Open to alternate suggestions, of course Iain
