Question

我正在尝试建立一个项目，但是OpenMP出现了一些问题

这是我正在使用的cmake：

cmake_minimum_required(VERSION 2.8.6)
project(render LANGUAGES CXX)

link_directories(../core/)
include_directories(../core/)

find_package(DART REQUIRED COMPONENTS gui collision-bullet CONFIG)
find_package(OpenGL REQUIRED)
find_package(GLUT REQUIRED)
find_package(OpenMP REQUIRED) # Find the package

if (OPENGL_FOUND)
    message("Found OpenGL for Mac OS")
    message("OpenGL for Mac OS, include dir: ${OPENGL_INCLUDE_DIR}")
    message("OpenGL for Mac OS, link libraries: ${OPENGL_gl_LIBRARY}")
else (OPENGL_FOUND)
    message(FATAL_ERROR "OpenGL for Mac OS not found")
    endif()

find_package(PythonLibs REQUIRED)
find_package(Boost COMPONENTS filesystem python37 numpy37)

include_directories(${DART_INCLUDE_DIRS})
include_directories(${OPENGL_INCLUDE_DIR})
include_directories(${GLUT_INCLUDE_DIR})
include_directories(${PYTHON_INCLUDE_DIR})
include_directories(${Boost_INCLUDE_DIRS})

file(GLOB srcs "*.h" "*.cpp")
add_executable(render ${srcs})
target_link_libraries(render ${DART_LIBRARIES} ${Boost_LIBRARIES} ${PYTHON_LIBRARIES} ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} ${GLUT_LIBRARIES} ${OpenMP_CXX_LIBRARIES} ${OpenMP_C_LIBRARIES} mss)

这是终端中的输出：

CMake Error at /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find OpenMP_CXX (missing: OpenMP_CXX_FLAGS OpenMP_CXX_LIB_NAMES)
Call Stack (most recent call first):
  /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  /usr/local/Cellar/cmake/3.15.4/share/cmake/Modules/FindOpenMP.cmake:477 (find_package_handle_standard_args)
  render/CMakeLists.txt:10 (find_package)


-- Configuring incomplete, errors occurred!
See also "/Users/vittorio/Documents/MASS-master/build/CMakeFiles/CMakeOutput.log".
See also "/Users/vittorio/Documents/MASS-master/build/CMakeFiles/CMakeError.log".

现在，如果我在执行cmake时使用以下选项，它将成功完成：

rm -rf build && mkdir build && cd build && cmake -DOpenMP_C_FLAGS="-Xpreprocessor -fopenmp" -DOpenMP_C_LIB_NAMES="omp" -DOpenMP_CXX_FLAGS="-Xpreprocessor -fopenmp -I$(brew --prefix libomp)/include" -DOpenMP_CXX_LIB_NAMES="omp" -DOpenMP_omp_LIBRARY=$(brew --prefix libomp)/lib/libomp.dylib -D Boost_NO_BOOST_CMAKE:BOOL=ON ..

但是当使用make -j8构建项目时，它将无法链接到openmp。

与我的问题最接近的答案（但仍然无法解决）是： Compiling and linking against OpenMP with AppleClang on Mac OS X Mojave

有人可以帮我吗？任何帮助我将不胜感激！

PS：如果您想知道编译器信息是

-- The CXX compiler identification is AppleClang 11.0.0.11000033
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done

Answer 1

如here所述。链接OpenMP的方式已更新

对于CMake 3.9+：

find_package(OpenMP)
if(OpenMP_CXX_FOUND)
    target_link_libraries(MyTarget PUBLIC OpenMP::OpenMP_CXX)
endif()

OpenMP无法在macOS Catalina中建立/链接吗？

1 个答案: