Question

我已经基于this post构建了一个静态opencv库，之后我想为我的应用程序调用静态opencv库。但是，似乎应用程序无法链接静态opencv库，它给了我以下警告：

ld: warning: ignoring file /usr/local/lib/libopencv_core.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/libopencv_core.a
ld: warning: ignoring file /usr/local/lib/libopencv_highgui.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/libopencv_highgui.a
ld: warning: ignoring file /usr/local/lib/libopencv_imgproc.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/libopencv_imgproc.a
ld: warning: ignoring file /usr/local/lib/liblibjasper.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/liblibjasper.a
ld: warning: ignoring file /usr/local/lib/liblibjpeg.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/liblibjpeg.a
ld: warning: ignoring file /usr/local/lib/liblibpng.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/liblibpng.a
ld: warning: ignoring file /usr/local/lib/liblibtiff.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/liblibtiff.a
ld: warning: ignoring file /usr/local/lib/libzlib.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/libzlib.a
ld: warning: ignoring file /usr/local/lib/libIlmImf.a, file was built for archive which is not the architecture being linked (i386): /usr/local/lib/libIlmImf.a

在我看来，应用程序正在尝试调用动态opencv库，而只调用cv::Mat测试的简单应用程序会给我以下错误：

Undefined symbols for architecture i386:
  "cv::Mat::deallocate()", referenced from:
      cv::Mat::release() in main.o
  "cv::fastFree(void*)", referenced from:
      cv::Mat::~Mat() in main.o

修改由于答案表明它不是链接问题，而是链接为不同体系结构构建的库的问题。除此之外，构建和使用静态OpenCV库时应注意的另外两件重要事项是：

确保它仅构建Active Architecture（是）。
此外，您应该链接opencv_highgui.a使用的framework Cocoa;general;-framework QTKit;general;-framework QuartzCore;general;-framework AppKit;。

Answer 1

这不是关于不成功的链接，这是关于不成功的建设。 '文件是为归档而构建的，而不是被链接的体系结构（i386）'。您需要正确构建它，所以说，构建它以获得正确的架构。

Answer 2

我相信通过不向cmake命令行传递任何选项，它确实为您的计算机的本机架构（这是默认选项）构建了库，大概是 x86_64 。但是，出于某种原因，您正在尝试在此构建一个32位 i386 应用程序。因此，您的架构没有正确的静态库。

您可以通过在-Darch=i386中以32位（cmake）构建OpenCV，或者通过构建应用程序64位（本机arch或x86_64，具体取决于您的构建系统）来解决此问题。 / p>

如果您觉得很勇敢，您还可以构建32位和64位静态库，将它们组装成通用二进制文件，并链接到该通用库。

Answer 3

您应该使用以下方式构建本地应用程序：

cmake .. -DOpenCV_DIR=/path/to/opencv-3.0.0-beta/build/ -DCMAKE_OSX_ARCHITECTURES=x86_64

即。强制本地构建为x86_64，这就是opencv版本

调用静态opencv库

3 个答案: