linux交叉编译和动态库/链接
我正在尝试为 BeagleBoard 进行开发。 因此我安装了 CodeSourcery Sourcery_G++_Lite 工具链。
我想使用 opencv 库。因此，我将源代码下载到我的 Ubuntu 开发系统中，使用 gcc 作为共享库进行编译并安装该库。 当我为 x86 架构构建 helloworld 应用程序时，一切都很好。
现在，我想使用 ARM 架构的其他工具链编译相同的应用程序。
我在编译/链接时收到这些警告/错误：
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -c ImageProcessing.cpp -o ImageProcessing.o -I/usr/local/include
cc1plus: warning: include location "/usr/local/include" is unsafe for cross-compilation
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -c Main.cpp -o Main.o -I/usr/local/include
cc1plus: warning: include location "/usr/local/include" is unsafe for cross-compilation
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -oApplication -L/usr/local/lib Main.o ImageProcessing.o -lopencv_core
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: warning: library search path "/usr/local/lib" is unsafe for cross-compilation
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: skipping incompatible /usr/local/lib/libopencv_core.so when searching for -lopencv_core
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lopencv_core
collect2: ld returned 1 exit status
显然，我使用与 x86 架构相同的包含目录和库路径。这是行不通的。但我必须做什么？我必须交叉编译 opencv 库吗？
i'm trying to develop for the BeagleBoard.
Therefore i installed the CodeSourcery Sourcery_G++_Lite Toolchain.
I want to use the opencv library. So I downloaded the sources to my Ubuntu devolepment system, compiled with gcc as shared library and installed the library.
When i build a helloworld-application for the x86-Architecture, everything is fine.
Now, i want to compile the same application with the other toolchain for the ARM-Architecture.
I get these warnings/erros while compiling/linking:
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -c ImageProcessing.cpp -o ImageProcessing.o -I/usr/local/include
cc1plus: warning: include location "/usr/local/include" is unsafe for cross-compilation
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -c Main.cpp -o Main.o -I/usr/local/include
cc1plus: warning: include location "/usr/local/include" is unsafe for cross-compilation
john@ubuntu:~/Downloads/BeagleTest$ arm-none-linux-gnueabi-g++ -oApplication -L/usr/local/lib Main.o ImageProcessing.o -lopencv_core
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: warning: library search path "/usr/local/lib" is unsafe for cross-compilation
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: skipping incompatible /usr/local/lib/libopencv_core.so when searching for -lopencv_core
/usr/local/CodeSourcery/Sourcery_G++_Lite/bin/../lib/gcc/arm-none-linux-gnueabi/4.2.1/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lopencv_core
collect2: ld returned 1 exit status
Obviously, im using the same include-directories and library-pathes like im using for the x86-Architecture. This does not work. But what do i have to do? Do i have to cross compile the opencv-library?
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库必须进行交叉编译，并且必须确保在链接时找到正确的库。如果这不能自动工作，您可能需要查看 gcc 的
--sysroot命令行开关。Libraries have to be cross compiled and you have to make sure the correct library is found when linking. If that shouldn't work automatically you may want to take a look at the
--sysrootcommand line switch of gcc.是的。库特定于架构。
Yes. Libraries are specific to an architecture.