yaourt -S llvm50

gistfile1.txt

[100%] Linking CXX shared library ../../../../lib/libclang.so
[100%] Built target libclang
Scanning dependencies of target c-index-test
Scanning dependencies of target c-arcmt-test
Scanning dependencies of target libclangTests
[100%] Building C object tools/clang/tools/c-arcmt-test/CMakeFiles/c-arcmt-test.dir/c-arcmt-test.c.o
[100%] Building CXX object tools/clang/unittests/libclang/CMakeFiles/libclangTests.dir/LibclangTest.cpp.o
[100%] Building CXX object tools/clang/tools/c-index-test/CMakeFiles/c-index-test.dir/core_main.cpp.o
[100%] Building C object tools/clang/tools/c-index-test/CMakeFiles/c-index-test.dir/c-index-test.c.o
[100%] Linking CXX executable ../../../../bin/c-arcmt-test
[100%] Built target c-arcmt-test
[100%] Linking CXX executable libclangTests
[100%] Built target libclangTests
[100%] Linking CXX executable ../../../../bin/c-index-test
[100%] Built target c-index-test
make: *** No rule to make target 'ocaml_doc'.  Stop.
==> ERROR: A failure occurred in build().
    Aborting...
==> ERROR: Makepkg was unable to build llvm50.