llvm34 Homebrew install log

gistfile1.txt

==> Installing llvm34 from homebrew/versions
==> Downloading http://llvm.org/releases/3.4.2/llvm-3.4.2.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34-3.4.2.tar.gz
==> Patching
patching file Makefile.rules
patching file tools/llvm-shlib/Makefile
patching file tools/lto/Makefile
==> Downloading http://llvm.org/releases/3.4.2/cfe-3.4.2.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34--clang-3.4.2.tar.gz
==> Downloading http://llvm.org/releases/3.4.2/libcxx-3.4.2.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34--libcxx-3.4.2.tar.gz
==> Downloading http://llvm.org/releases/3.4/polly-3.4.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34--polly-3.4.tar.gz
==> Downloading http://llvm.org/releases/3.4/clang-tools-extra-3.4.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34--clang-tools-extra-3.4.tar.gz
==> Downloading http://llvm.org/releases/3.4/compiler-rt-3.4.src.tar.gz
Already downloaded: /Users/ethan/Library/Caches/Homebrew/llvm34--compiler-rt-3.4.tar.gz
==> ./configure --prefix=/usr/local/Cellar/llvm34/3.4.2/lib/llvm-3.4 --enable-optimized --disable-bindings --with-gmp=/usr/local/opt/gmp --with-isl=/usr/local/opt/isl --with-cloog=/
==> make VERBOSE=1
Last 15 lines from /Users/ethan/Library/Logs/Homebrew/llvm34/02.make:
/bin/sh: line 1: 66885 Trace/BPT trap: 5       /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/bin/clang -arch $arch -c -integrated-as /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/make/platform/clang_darwin_test_input.c -isysroot /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/SDKs/darwin -o /dev/null > /dev/null 2> /dev/null
warning: clang_darwin.mk: dropping arch 'i386' from lib 'asan_iossim_dynamic'
/bin/sh: line 1: 66886 Trace/BPT trap: 5       /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/bin/clang -arch $arch -c -integrated-as /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/make/platform/clang_darwin_test_input.c -isysroot /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/SDKs/darwin -o /dev/null > /dev/null 2> /dev/null
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'asan_iossim_dynamic'
/bin/sh: line 1: 66888 Trace/BPT trap: 5       /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/bin/clang -arch $arch -c -integrated-as /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/make/platform/clang_darwin_test_input.c -isysroot /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/SDKs/darwin -o /dev/null > /dev/null 2> /dev/null
warning: clang_darwin.mk: dropping arch 'i386' from lib 'ubsan_osx'
/bin/sh: line 1: 66889 Trace/BPT trap: 5       /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/bin/clang -arch $arch -c -integrated-as /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/make/platform/clang_darwin_test_input.c -isysroot /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/projects/compiler-rt/SDKs/darwin -o /dev/null > /dev/null 2> /dev/null
warning: clang_darwin.mk: dropping arch 'x86_64' from lib 'ubsan_osx'
make/platform/clang_linux.mk:16: *** "unable to infer compiler target triple for /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/bin/clang".  Stop.
make[4]: *** [BuildRuntimeLibraries] Error 2
rm /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/lib/clang/3.4.2/lib/darwin/.dir /private/tmp/llvm34-20160719-43470-1e6jyie/llvm-3.4.2.src/Release+Asserts/lib/clang/3.4.2/lib/darwin_embedded/.dir
make[3]: *** [compiler-rt/.makeall] Error 2
make[2]: *** [all] Error 1
make[1]: *** [clang/.makeall] Error 2
make: *** [all] Error 1

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  https://github.com/Homebrew/homebrew-versions/issues

These open issues may also help:
llvm34 fails to build under El Capitan https://github.com/Homebrew/homebrew-versions/issues/981