Internal LLVM syntax errors when following Pass tutorial using CMake -

i attempting follow tutorial here developing "hello, world" llvm pass - using guidelines linked tutorial here doing out of llvm source directory. however, when attempt follow tutorial, cmake reports number of errors internal llvm itself.

i have following directory structure:

helloworld/ cmakelists.txt helloworld/ cmakelists.txt helloworld.cpp

my helloworld.cpp, , 2 cmakelists.txt copy , pasted directly tutorials linked above.

i run cmake helloworld , generates cmake configuration. however, when run make. numerous errors reported within llvm codebase itself.

[ 50%] building cxx object cmakefiles/llvmpassname.dir/vectorize.cpp.o in file included /volumes/andromeda/helloworld/helloworld.cpp:1: in file included /usr/local/cellar/llvm/3.6.2/include/llvm/pass.h:377: in file included /usr/local/cellar/llvm/3.6.2/include/llvm/passsupport.h:27: in file included /usr/local/cellar/llvm/3.6.2/include/llvm/passregistry.h:20: in file included /usr/local/cellar/llvm/3.6.2/include/llvm-c/core.h:18: in file included /usr/local/cellar/llvm/3.6.2/include/llvm-c/support.h:17: /usr/local/cellar/llvm/3.6.2/include/llvm/support/datatypes.h:57:3: error: "must #define       __stdc_limit_macros before #including support/datatypes.h" # error "must #define __stdc_limit_macros before #including support/datatypes.h"   ^ /usr/local/cellar/llvm/3.6.2/include/llvm/support/datatypes.h:61:3: error: "must #define       __stdc_constant_macros before "         "#including support/datatypes.h" # error "must #define __stdc_constant_macros before " \ 

the list goes on , on , of them refer errors in llvm header files. clean install of llvm using homebrew. linking work, had set cplus_include_path homebrew include directory llvm.

my first thought cmake attempting use different compiler (clang vs. gcc or vice versa), setting cmake_cxx_compiler point either clang or g++ installation did not help.

does have ideas might problem here?

---

after following link provided @oak in comments, able rid of first 2 support/datatype errors. however, many of errors still remain.

in file included /usr/local/cellar/llvm/3.6.2/include/llvm/pass.h:377: in file included /usr/local/cellar/llvm/3.6.2/include/llvm/passsupport.h:27: in file included /usr/local/cellar/llvm/3.6.2/include/llvm/passregistry.h:21: /usr/local/cellar/llvm/3.6.2/include/llvm/adt/densemap.h:543:63: error: space required       between consecutive right angle brackets (use '> >')           typename buckett = detail::densemappair<keyt, valuet>>                                                               ^ /usr/local/cellar/llvm/3.6.2/include/llvm/adt/densemap.h:694:63: error: space required       between consecutive right angle brackets (use '> >')           typename buckett = detail::densemappair<keyt, valuet>> 

so, after research, turns out there inconsistency how llvm , cmake support out-of-source builds. llvm binaries built -fno-rtti, cmake complain missing symbols unless uses -fno-rtti when compiling llvm pass.

i fixed of troubles (including solved temporary fix proposed oak) adding set(cmake_cxx_flags "-wall -fno-rtti") cmakelists.txt file in innermost directory.

this inspired question on stackoverflow.