如果我像这样直接安装opencv：
mkdir build && cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX="/some/path" ..
make install
opencv会创建一个错误的pkg-config文件，如下所示：
# Package Information for pkg-config
prefix=/some/path
exec_prefix=${prefix}
libdir=
includedir_old=${prefix}/include/opencv
includedir_new=${prefix}/include
Name: OpenCV
Description: Open Source Computer Vision Library
Version: 2.4.10
Libs: ${exec_prefix}/lib/libopencv_calib3d.so ${exec_prefix}/lib/libopencv_contrib.so ${exec_prefix}/lib/libopencv_core.so ${exec_prefix}/lib/libopencv_features2d.so ${exec_prefix}/lib/libopencv_flann.so ${exec_prefix}/lib/libopencv_gpu.so ${exec_prefix}/lib/libopencv_highgui.so ${exec_prefix}/lib/libopencv_imgproc.so ${exec_prefix}/lib/libopencv_legacy.so ${exec_prefix}/lib/libopencv_ml.so ${exec_prefix}/lib/libopencv_nonfree.so ${exec_prefix}/lib/libopencv_objdetect.so ${exec_prefix}/lib/libopencv_ocl.so ${exec_prefix}/lib/libopencv_photo.so ${exec_prefix}/lib/libopencv_stitching.so ${exec_prefix}/lib/libopencv_superres.so ${exec_prefix}/lib/libopencv_ts.a ${exec_prefix}/lib/libopencv_video.so ${exec_prefix}/lib/libopencv_videostab.so -lrt -lpthread -lm -ldl
Cflags: -I${includedir_old} -I${includedir_new}
哪个产生输出，不能直接用于编译器，或者通过cmake：
$ pkg-config opencv --libs
/sct/homes3/opencv/opencv_2_4_10/lib/libopencv_calib3d.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_contrib.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_core.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_features2d.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_flann.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_gpu.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_highgui.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_imgproc.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_legacy.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_ml.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_nonfree.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_objdetect.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_ocl.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_photo.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_stitching.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_superres.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_ts.a /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_video.so /sct/homes3/opencv/opencv_2_4_10/lib/libopencv_videostab.so -lrt -lpthread -lm -ldl
你可以看到opencv的库是由它们的完整路径给出的，并且没有给出编译器标志。
opencv.pc的正确版本应如下所示：
# Package Information for pkg-config
prefix=/some/path
exec_prefix=${prefix}
libdir=${prefix}/lib
includedir_old=${prefix}/include/opencv
includedir_new=${prefix}/include
Name: OpenCV
Description: Open Source Computer Vision Library
Version: 2.4.10
Libs: -L${libdir} -lopencv_calib3d -lopencv_contrib -lopencv_core -lopencv_features2d -lopencv_flann -lopencv_gpu -lopencv_highgui -lopencv_imgproc -lopencv_legacy -lopencv_ml -lopencv_nonfree -lopencv_objdetect -lopencv_ocl -lopencv_photo -lopencv_stitching -lopencv_superres -lopencv_ts -lopencv_video -lopencv_videostab -lrt -lpthread -lm -ldl
Cflags: -I${includedir_old} -I${includedir_new}
那么为什么opencv / cmake会产生这样一个pkg-config文件呢？
或者我对make install做错了什么？