有很多方法可以将cross-compile转换为Raspberry Pi,也发布了用于交叉编译Qt或opencv的解决方案.

但是,我找不到任何解决方案来与也使用opencv的Qt交叉编译程序.

我在64位PC上使用debian尝试了以下操作：

>我使用this tutorial编译并将Qt设置为ARM7的交叉编译器.尽管如此,它还是没有问题,我发布了here is an answer,为我解决了这个问题.我现在可以在Raspberry Pi上使用图形GUI运行我的Qt程序(尽管只有全屏,但这是一个完全不同的问题)

>我在opencv官方网站上关注了the guide,以构建opencv.失败,找不到CMAKE_CXX_COMPILER.

>从经验(我在Windows和Linux上都将Qt与opencv一起使用)中得知,Qt和opencv只能在同一个编译器下编译时才能一起工作,所以我尝试对opencv使用相同的交叉编译器,我成功地使用了该交叉编译器来编译Qt ：gcc-4.7-linaro-rpi-gnueabihf

>我将以前用来编译Qt的gnueabihf指定为编译器：

我创建了目录?/ opt / opencv_build_arm7 /,并在其中尝试：

sudo cmake -DCMAKE_CXX_COMPILER=/home//opt/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-g++ -DCMAKE_C_COMPILER=/home//opt/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-gcc -DCMAKE_TOOLCHAIN_FILE=/usr/dev/opencv/platforms/linux/arm-gnueabi.toolchain.cmake /usr/dev/opencv/

(下载的opencv源在/usr/dev / opencv /中,我最近成功地使用了Qt安装随附的g编译器为x64平台编译了opencv.)注意,< user>是当前会话的用户名,以防将来其他初学者将来尝试这些方法.

此操作失败,并显示以下错误(其中< user>是我的用户名)

CMake Error at

/usr/share/cmake-3.0/Modules/CMakeTestCXXCompiler.cmake:54 (message):

The C++ compiler

“/home//opt/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-g++”

is not able to compile a simple test program.

It fails with the following output :

Change Dir: /home//temp/CMakeFiles/CMakeTmp

Run Build Command:”/usr/bin/make” “cmTryCompileExec117178613/fast”

/usr/bin/make -f CMakeFiles/cmTryCompileExec117178613.dir/build.make

CMakeFiles/cmTryCompileExec117178613.dir/build

make07006: Entering directory ‘/home//temp/CMakeFiles/CMakeTmp’

/usr/bin/cmake -E cmake_progress_report

/home//temp/CMakeFiles/CMakeTmp/CMakeFiles 1

Building CXX object

CMakeFiles/cmTryCompileExec117178613.dir/testCXXCompiler.cxx.o

/home//opt/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-g++

-mthumb -fdata-sections -Wa,–noexecstack -fsigned-char -Wno-psabi -mthumb -fdata-sections -Wa,–noexecstack -fsigned-char -Wno-psabi -o CMakeFiles/cmTryCompileExec117178613.dir/testCXXCompiler.cxx.o -c /home//temp/CMakeFiles/CMakeTmp/testCXXCompiler.cxx

/home//temp/CMakeFiles/CMakeTmp/testCXXCompiler.cxx: In

function ‘int main()’:

/home//temp/CMakeFiles/CMakeTmp/testCXXCompiler.cxx:4:10:

sorry, unimplemented: Thumb-1 hard-float VFP ABI

CMakeFiles/cmTryCompileExec117178613.dir/build.make:57: recipe for

target

‘CMakeFiles/cmTryCompileExec117178613.dir/testCXXCompiler.cxx.o’

failed

make07006: ***

[CMakeFiles/cmTryCompileExec117178613.dir/testCXXCompiler.cxx.o] Error

1

make07006: Leaving directory ‘/home//temp/CMakeFiles/CMakeTmp’

Makefile:118: recipe for target ‘cmTryCompileExec117178613/fast’

failed

make: *** [cmTryCompileExec117178613/fast] Error 2

我为编译器指定了绝对路径,但是即使我没有指定它,也只是将其添加到我的$PATH中,它仍然存在相同的问题.

export PATH=$PATH:/home//opt/gcc-4.7-linaro-rpi-gnueabihf/bin/

sudo cmake -DCMAKE_TOOLCHAIN_FILE=/usr/dev/opencv/platforms/linux/arm-gnueabi.toolchain.cmake /usr/dev/opencv/

如果我键入,则可以正确找到编译器本身

arm-linux-gnueabihf-g++ -v

找到成功：

Using built-in specs. COLLECT_GCC=./arm-linux-gnueabihf-c++

COLLECT_LTO_WRAPPER=/home/vszabi/opt/gcc-4.7-linaro-rpi-gnueabihf/bin/../libexec/gcc/arm-linux-gnueabihf/4.7.2/lto-wrapper

Target: arm-linux-gnueabihf Configured with:

/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/src/gcc-linaro-4.7-2012.07/configure

–build=i686-build_pc-linux-gnu –host=i686-build_pc-linux-gnu –target=arm-linux-gnueabihf –prefix=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/install

–with-sysroot=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc

–enable-languages=c,c++,fortran –enable-multilib –with-arch=armv6zk –with-tune=arm1176jzf-s –with-fpu=vfp –with-float=hard –with-pkgversion=’crosstool-NG linaro-1.13.1-2012.07-20120720 – Linaro GCC 2012.07′

–with-bugurl=07009 –enable-__cxa_atexit –enable-libmudflap –enable-libgomp –enable-libssp –with-gmp=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-mpfr=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-mpc=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-ppl=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-cloog=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-libelf=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static

–with-host-libstdcxx=’-L/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/.build/arm-linux-gnueabihf/build/static/lib

-lpwl’ –enable-threads=posix –disable-libstdcxx-pch –enable-linker-build-id –enable-gold –with-local-prefix=/opt/dev/src/crosstool-ng/crosstool-ng-linaro-1.13.1-2012.07-20120720/builds/arm-linux-gnueabihf-linux/install/arm-linux-gnueabihf/libc

–enable-c99 –enable-long-long Thread model: posix gcc version 4.7.2 20120701 (prerelease) (crosstool-NG linaro-1.13.1-2012.07-20120720 –

Linaro GCC 2012.07)

接下来我可以尝试什么？使用opencv / platforms / linux / arm-gnueabi.toolchain.cmake打开gui版本的gui版本会显示很少的选项(仅ARM_LINUX_SYSROOT,CMAKE_BUILD_TYPE,CMAKE_CONFIGURATION_TYPES,CMAKE_INSTALL_PREFIX,GCC_COMPILER_v_y和单独的LIBRARY_OUTPUT_UTP和LIBRARY_OUTPUT ),比我为x86或x64平台构建opencv时的case少得多.

恐怕搜索其他编译器可能会导致Qt出现问题,因为据我所知,要使opencv在Qt中运行,必须使用与用于构建Qt库的编译器相同的编译器进行编译.构建我的程序.每当我过去尝试时,如果不小心需要使用相同的编译器来编译这三件事(Qt库,opencv,我的程序),无论何时我包含任何opencv标头,或者无论何时我每次都遇到奇怪的崩溃从opencv调用了任何函数.