clang-3.6 @3.6.1_1: incorrectly uses libunwind port if installed

[mkae (Marko Käning)]

What's going on with libunwind and the architectures here?

:info:build /opt/local/bin/ranlib 2> /dev/null /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang/    runtime/compiler-rt/clang_darwin/ubsan_osx/i386/libcompiler_rt.a
:info:build /opt/local/bin/ranlib 2> /dev/null /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang/    runtime/compiler-rt/clang_darwin/ubsan_osx/x86_64/libcompiler_rt.a
:info:build ld: in '/opt/local/lib/libunwind.dylib', file was built for x86_64 which is not the architecture being linked (i386): /opt/local/lib/libunwind.dylib for architecture i386
:info:build clang: error: linker command failed with exit code 1 (use -v to see invocation)
:info:build make[4]: *** [/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang/runtime/compiler-rt/     clang_darwin/asan_osx_dynamic/i386/libcompiler_rt.dylib] Error 1
:info:build make[4]: *** Waiting for unfinished jobs....
:info:build make[4]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/llvm-3.6.1.src/projects/     compiler-rt'
:info:build make[3]: *** [BuildRuntimeLibraries] Error 2
:info:build rm /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/Release+Debug/lib/clang/3.6.1/lib/darwin/.dir / opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/Release+Debug/lib/clang/3.6.1/lib/macho_embedded/.dir
:info:build make[3]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang/runtime/   compiler-rt'
:info:build make[2]: *** [compiler-rt/.makeall] Error 2
:info:build make[2]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang/runtime'
:info:build make[1]: *** [all] Error 1
:info:build make[1]: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build/tools/clang'
:info:build make: *** [all] Error 1
:info:build make: Leaving directory `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build'
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.6/clang-3.6/work/build" && /usr/bin/make -j5 -w      clang-only
:info:build Exit code: 2
:error:build org.macports.build for port clang-3.6 returned: command execution failed

[larryv (Lawrence Velázquez)]

You have the libunwind port installed? It looks like Clang’s build is picking that up accidentally.

[mkae (Marko Käning)]

Can one forbid that for clang in its portfile somehow, or do I need to manually deactivate it myself before upgrading clang?

[mkae (Marko Käning)]

I've uninstalled port libunwind and upgraded clang-3.6 successfully by now.

[mkae (Marko Käning)]

So, shall this be

• considered a port bug to be fixed (perhaps by simply adding a warning ui_msg?)
• or closed as invalid?

[larryv (Lawrence Velázquez)]

Leave it open. The opportunistic nature makes it a port bug.

[jeremyhu (Jeremy Huddleston Sequoia)]

Yeah, we need to fix this. Don't close it.

[jeremyhu (Jeremy Huddleston Sequoia)]

Can you please attach your full log?

[mkae (Marko Käning)]

Sorry, that's already history. I can't supply a log anymore without reverting to the previous clang-3.6 version, reinstalling libunwind and redoing a clang-3.6 update.

[jeremyhu (Jeremy Huddleston Sequoia)]

Ok, well from what I can tell, the i386 ASan libcompiler_rt.dylib build tried to link against MacPorts' libunwind.dylib for some reason. I'll need to take a closer look at the Makefiles. Did clang-3.5 and/or clang-3.7 build ok for you with libunwind installed?

[mkae (Marko Käning)]

I _believe_ that clang-3.5 didn't misbehave. clang-3.7 I didn't have installed at the time, sorry.

[jeremyhu (Jeremy Huddleston Sequoia)]

This is an issue with the linker and no w something we can really do anything about. You should install libunwind +universal.