[rust-dev] Rust universal build issues

Brian Anderson banderson at mozilla.com
Fri Jul 18 15:57:06 PDT 2014


On 07/18/2014 03:43 PM, Aljaž Srebrnič wrote:
> On 17/lug/2014, at 20:08, Brian Anderson <banderson at mozilla.com> wrote:
>
>> Thanks for your work on MacPorts. Did you use any flags to configure or arguments to make? What version of OS X, clang/gcc?
> Yes, sorry, I’m building this on OS X 10.9.4 with system clang (5.1). After further inspection, I can build it with target and host set to x86_64-apple-darwin, but when I try to add i686-apple-darwin to the target list, the build fails. Is compiling for 32 bit on 64 bit host still supported?

Yes, it should work. I suspect there is some interaction with your 
(relatively new) toolchain that nobody has seen before.

>
>> On 07/17/2014 01:17 AM, Aljaž Srebrnič wrote:
>>> Hello list,
>>> I’m ono of the maintainers of rust on MacPorts, and I found some issues with the build. The script in src/compiler-rt/make/platform/clang_darwin.mk has a comment on line 135:
>>>
>>> # Forcibly strip off any -arch, as that totally breaks our universal support.
>>>
>>> Now, it looks like that script strips any -arch flags and adds -arch flags for *all* the supported architectures by the host compiler. As a result, some of the files are compiled as x86_64 only (the original arch flags) and some as a fat binary (i386 and x86_64). In stage3, linking fails:
>> I don't believe the build system is supposed to build stage3 on OS X. Seems suspicious.
> I could be wrong about the stage number, I just inferred because the stage3 directory had no files in it.
>
>>> […]
>>> error: ar 'x' '/opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_dports_lang_rust/rust/work/rust-0.11.0/i686-apple-darwin/rt/libjemalloc.a' failed with: exit code: 1
>>> note: stdout ---
>>>
>>> note: stderr ---
>>> ar: /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_dports_lang_rust/rust/work/rust-0.11.0/i686-apple-darwin/rt/libjemalloc.a is a fat file (use libtool(1) or lipo(1) and ar(1) on it)
>>> ar: /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_dports_lang_rust/rust/work/rust-0.11.0/i686-apple-darwin/rt/libjemalloc.a: Inappropriate file type or format
>>> […]
>>>
>>> I saw a env variable, $RC_SUPPORTED_ARCHS and tried to set RC_SUPPORTED_ARCHS=“x86_64”, but to no avail. How can I instruct compiler-rt to build for my architecture only?
>>>
>>> Thanks,
>>> Aljaž
>>>
>>> --
>>> Aljaž Srebrnič a.k.a g5pw
>>> My public key:  http://bit.ly/g5pw_pubkey
>>>
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>
> --
> Aljaž Srebrnič a.k.a g5pw
> My public key:  http://bit.ly/g5pw_pubkey
>



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