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Add these lines in your CMakeLists.txt

#check for OpenMP
find_package(OpenMP)
if(OPENMP_FOUND)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
  if(MSVC90 OR MSVC10)
    if(MSVC90)
      set(OPENMP_DLL VCOMP90)
    elseif(MSVC10)
      set(OPENMP_DLL VCOMP100)
    endif(MSVC90)
    set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /DELAYLOAD:${OPENMP_DLL}D.dll")
    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DELAYLOAD:${OPENMP_DLL}.dll")
  endif(MSVC)
else(OPENMP_FOUND)
  message (STATUS "OpenMP not found")
endif()

if (MSVC)
  Set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /O2 ${SSE_FLAGS}")
else (MSVC)
  set(CMAKE_CXX_FLAGS "-O3 ${CMAKE_CXX_FLAGS} ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} -O0 -g ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_RELEASE " ${CMAKE_CXX_FLAGS} -O3 ${SSE_FLAGS}")
endif (MSVC)

Add these lines in your CMakeLists.txt

#check for OpenMP
find_package(OpenMP)
if(OPENMP_FOUND)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
  if(MSVC90 OR MSVC10)
    if(MSVC90)
      set(OPENMP_DLL VCOMP90)
    elseif(MSVC10)
      set(OPENMP_DLL VCOMP100)
    endif(MSVC90)
    set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /DELAYLOAD:${OPENMP_DLL}D.dll")
    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DELAYLOAD:${OPENMP_DLL}.dll")
  endif(MSVC)
else(OPENMP_FOUND)
  message (STATUS "OpenMP not found")
endif()

if (MSVC)
  Set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /O2 ${SSE_FLAGS}")
else (MSVC)
  set(CMAKE_CXX_FLAGS "-O3 ${CMAKE_CXX_FLAGS} ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} -O0 -g ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_RELEASE " ${CMAKE_CXX_FLAGS} -O3 ${SSE_FLAGS}")
endif (MSVC)

This has solved the same similar errors which I encountered in an other pkg. Hopefully it will solve yours too :)

Add these lines in your CMakeLists.txt

#check for OpenMP
find_package(OpenMP)
if(OPENMP_FOUND)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
  if(MSVC90 OR MSVC10)
    if(MSVC90)
      set(OPENMP_DLL VCOMP90)
    elseif(MSVC10)
      set(OPENMP_DLL VCOMP100)
    endif(MSVC90)
    set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /DELAYLOAD:${OPENMP_DLL}D.dll")
    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /DELAYLOAD:${OPENMP_DLL}.dll")
  endif(MSVC)
else(OPENMP_FOUND)
  message (STATUS "OpenMP not found")
endif()

if (MSVC)
  Set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /O2 ${SSE_FLAGS}")
else (MSVC)
  set(CMAKE_CXX_FLAGS "-O3 ${CMAKE_CXX_FLAGS} ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS} -O0 -g ${SSE_FLAGS}")
  set(CMAKE_CXX_FLAGS_RELEASE " ${CMAKE_CXX_FLAGS} -O3 ${SSE_FLAGS}")
endif (MSVC)