clang-3.5: ld: library not found for -lc++

[csinz (Carsten Sinz)]

Trying to build clang-3.5 with Xcode 7.0.1 (Build version 7A1001) on OS X El Capitan 10.11 (15A284) fails:

$ sudo port install clang-3.5
--->  Computing dependencies for clang-3.5
...
--->  Building clang-3.5
Error: org.macports.build for port clang-3.5 returned: command execution failed
Please see the log file for port clang-3.5 for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_llvm-3.5/clang-3.5/main.log
...
Error: Processing of port clang-3.5 failed

This seems to be a linker problem related to libc++, as the log file repeatedly contains the lines:

:info:build ld: library not found for -lc++
:info:build clang: error: linker command failed with exit code 1 (use -v to see invocation)

BTW: Building clang-3.6 on the same system works without a problem.

[csinz (Carsten Sinz)]

This seems to be the same problem as that of Ticket #49171 for clang-3.8.

[csinz (Carsten Sinz)]

I could solve the problem by using a suggestion from Ticket #48841:

sudo port install ld64 +ld64_xcode

before installing clang-3.5 did the job.

So the ticket can be closed.