c-Magick链接错误

我这里有一个使用Magick(ImageMagick接口)库的简单图像转换器代码.(Eclipse IDE)

#include <Magick++.h>
#include <string>
#include <iostream>

using namespace std;

using namespace Magick;

int main(int argc,char **argv) 
{ 
    Image image; 
    image.read("/home/usr1/test.tiff");
    image.write( "/home/usr1/test.bmp" ); 
    return 0;
}

我正在与arm-linux目标进行交叉编译.代码编译成功,但是在链接部分,出现未定义的引用错误.

/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x144): In function `vm_open':
ltdl/loaders/dlopen.c:194: undefined reference to `dlopen'
/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x158):ltdl/loaders/dlopen.c:198: undefined reference to `dlerror'
/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x16c): In function `vm_close':
ltdl/loaders/dlopen.c:212: undefined reference to `dlclose'
/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x17c):ltdl/loaders/dlopen.c:214: undefined reference to `dlerror'
/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x198): In function `vm_sym':
ltdl/loaders/dlopen.c:227: undefined reference to `dlsym'
/usr/local/lib/libMagick++/libMagickCore.a(dlopen.o)(.text+0x1ac):ltdl/loaders/dlopen.c:231: undefined reference to `dlerror'

我使用以下命令来编译代码：

/opt/Mx800SDK/vfitc/cross/bin/arm-linux-g++ -DMx870 -I/opt/Mx800SDK/vfitc/cross/arm-linux/include -I/usr/local/include/ImageMagick -I/opt/Mx800SDK/include -O2 -Wall -c -fmessage-length=0 -fno-strict-aliasing -o'main.o' '../main.cpp'

并链接：

/opt/Mx800SDK/vfitc/cross/bin/arm-linux-g++ -L/opt/Mx800SDK/lib -L/usr/local/lib/libMagick++ -o'imgConverter' ./main.o -lpthread -lMagick++ -lMagickWand -lMagickCore -ltiff -lz

我还需要其他链接才能成功链接它吗？我链接正确吗？提前致谢.

解决方法:

尝试反转Magick库,添加MagickWand库(并在最后放置libz和其他基本图像库,以及动态链接器库)：

... -lpthread -lMagick++ -lMagickWand -lMagickCore -lz -ldl

有关为何静态库顺序很重要的信息,请参见Linker Order – GCC.

标签：magick,c,linux,imagemagick,cross-compiling
来源： https://codeday.me/bug/20191011/1890250.html