[cfe-dev] clang + compiler-rt aren't buildable on OS X since r157062; how to proceed?

[Nico Weber]

Hi,

r157062 broke bootstrap builds of clang if compiler-rt is built too.
See http://llvm.org/PR12918 for details, in short: r157062 lets clang
output a load command for iOS targets that the ar binary in all
released Xcode versions doesn't understand. compiler-rt is built for
mac and ios when compiling on OS X by default.

As a result, I haven't been able to push a new clang to the chromium
repo in a while. What's the way forward here?

1.) Make a prerelease ar a requirement for doing bootstrap builds for
building clang and compiler-rt

2.) Augment r157062 to only use new load commands if target platforms
are new enough

3.) Remove ios from the default compiler-rt build

4.) Something else


I'm not able to push new clang binaries to chromium until this is resolved.

Thanks,
Nico