I try to get clang 5.0.0 working for Visual Studio 2015, because I need OpenMP 3.0 features. I installed the clang compiler (not the vs2015 version which does not have any openmp support) and use cmake:
cmake_minimum_required(VERSION 2.8.10) project(myproject) find_package(OpenMP) if (OPENMP_FOUND) set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}") set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}") endif() include_directories("include") add_library(libFoo STATIC Foo.cpp) install(TARGETS Foo libFoo LIBRARY DESTINATION lib ARCHIVE DESTINATION lib) When I now try to configure a MSVC 14 2015 Win64 build with or without toolchain LLVM-vs2014 I always get an error, that OpenMP is not found:
The C compiler identification is Clang 5.0.0 The CXX compiler identification is Clang 5.0.0 Check for working C compiler: D:/Program Files/LLVM/msbuild-bin/cl.exe Check for working C compiler: D:/Program Files/LLVM/msbuild-bin/cl.exe -- works Detecting C compiler ABI info Detecting C compiler ABI info - done Detecting C compile features Detecting C compile features - done Check for working CXX compiler: D:/Program Files/LLVM/msbuild-bin/cl.exe Check for working CXX compiler: D:/Program Files/LLVM/msbuild-bin/cl.exe -- works Detecting CXX compiler ABI info Detecting CXX compiler ABI info - done Detecting CXX compile features Detecting CXX compile features - done Could NOT find OpenMP_C (missing: OpenMP_C_FLAGS OpenMP_C_LIB_NAMES) (found version "1.0") Could NOT find OpenMP_CXX (missing: OpenMP_CXX_FLAGS OpenMP_CXX_LIB_NAMES) (found version "1.0") Configuring done The used compiler seems to be the right one (Installed clang, not the Microsoft version), it autodetects the clang-cl binary, but OpenMP fails. I tried to manually specify the compilers with "specify native compilers" and get the same result. It even selects the clang-cl version instead of clang++.
Related Answer, which does not solve the problem:
- Compiling C code with openmp using clang-cl - Recent clang has libomp.lib and libiomp5.dll included
