我正在尝试用make编译一些库，比如Opencv，我只是好奇它的行为。当我运行make 3次时，它会在链接时停止并在每次不同的文件上出错。每次也有不同的百分比。这是什么意思？建筑物目标总是以不同的顺序或什么？
[edit]添加make的输出，不知道是否可以从中找到任何内容。
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[ 75%] Generating opencl_kernels_superres.cpp, opencl_kernels_superres.hpp
[ 75%] Building NVCC (Device) object modules/superres/CMakeFiles/cuda_compile.dir/src/cuda/./cuda_compile_generated_btv_l1_gpu.cu.o
/home/tomas/Downloads/opencv-3.0.0/modules/superres/src/cuda/btv_l1_gpu.cu: In function ‘void btv_l1_cudev::upscale(cv::cuda::PtrStepSzb, cv::cuda::PtrStepSzb, int, cudaStream_t)’:
/home/tomas/Downloads/opencv-3.0.0/modules/superres/src/cuda/btv_l1_gpu.cu:129:67: warning: typedef ‘src_t’ locally defined but not used [-Wunused-local-typedefs]
typedef typename TypeVec<float, cn>::vec_type src_t;
^
/home/tomas/Downloads/opencv-3.0.0/modules/superres/src/cuda/btv_l1_gpu.cu: In function ‘void btv_l1_cudev::calcBtvRegularization(cv::cuda::PtrStepSzb, cv::cuda::PtrStepSzb, int)’:
/home/tomas/Downloads/opencv-3.0.0/modules/superres/src/cuda/btv_l1_gpu.cu:224:67: warning: typedef ‘src_t’ locally defined but not used [-Wunused-local-typedefs]
typedef typename TypeVec<float, cn>::vec_type src_t;
^
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Scanning dependencies of target opencv_test_xfeatures2d
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_detectors.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_surf.cuda.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_features2d.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_keypoints.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_rotation_and_scale_invariance.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_surf.ocl.cpp.o
[ 80%] Building CXX object modules/xfeatures2d/CMakeFiles/opencv_test_xfeatures2d.dir/test/test_main.cpp.o
Linking CXX executable ../../bin/opencv_test_xfeatures2d
[ 80%] Built target opencv_test_xfeatures2d
[ 81%] Built target opencv_ximgproc_pch_dephelp
[ 81%] Built target pch_Generate_opencv_ximgproc
[ 81%] Building CXX object modules/ximgproc/CMakeFiles/opencv_ximgproc.dir/src/sparse_match_interpolators.cpp.o
In file included from /home/tomas/Downloads/opencv-3.0.0/modules/core/include/opencv2/core.hpp:54:0,
from /home/tomas/Downloads/opencv-3.0.0/build/modules/ximgproc/precomp.hpp:40:
/home/tomas/opencv_contrib/opencv_contrib/modules/ximgproc/src/sparse_match_interpolators.cpp: In member function ‘virtual void cv::ximgproc::EdgeAwareInterpolatorImpl::interpolate(cv::InputArray, cv::InputArray, cv::InputArray, cv::InputArray, cv::OutputArray)’:
/home/tomas/opencv_contrib/opencv_contrib/modules/ximgproc/src/sparse_match_interpolators.cpp:171:52: error: ‘const class cv::_InputArray’ has no member named ‘isVector’
CV_Assert( !from_points.empty() && from_points.isVector() &&
^
/home/tomas/Downloads/opencv-3.0.0/modules/core/include/opencv2/core/base.hpp:389:33: note: in definition of macro ‘CV_Assert’
#define CV_Assert( expr ) if(!!(expr)) ; else cv::error( cv::Error::StsAssert, #expr, CV_Func, __FILE__, __LINE__ )
^
/home/tomas/opencv_contrib/opencv_contrib/modules/ximgproc/src/sparse_match_interpolators.cpp:172:52: error: ‘const class cv::_InputArray’ has no member named ‘isVector’
!to_points .empty() && to_points .isVector() &&
^
/home/tomas/Downloads/opencv-3.0.0/modules/core/include/opencv2/core/base.hpp:389:33: note: in definition of macro ‘CV_Assert’
#define CV_Assert( expr ) if(!!(expr)) ; else cv::error( cv::Error::StsAssert, #expr, CV_Func, __FILE__, __LINE__ )
^
make[2]: *** [modules/ximgproc/CMakeFiles/opencv_ximgproc.dir/src/sparse_match_interpolators.cpp.o] Error 1
make[1]: *** [modules/ximgproc/CMakeFiles/opencv_ximgproc.dir/all] Error 2
make: *** [all] Error 2
答案 0 :(得分：0)
回答您的直接问题，与您的构建失败原因无关：
-j选项运行make，则启用并行性，这意味着许多作业同时运行。取决于作业需要多长时间，哪些作业上次成功而哪些作业继续运行等等，可能每次都以不同的顺序启动它们。如果您希望每次都在同一个地方失败的可重现版本，请不要使用-j标记。-k标志运行make，它将在失败后继续运行，直到它耗尽可以在不依赖任何失败目标的情况下构建的内容。如果您希望make在遇到第一个错误时立即停止，请不要提供-k或-j标记。