使用g ++进行编译并将GraphicsMagick ++作为静态库

Question

The following command works

g++ file.cpp $( GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs )

but i want a static executable that is not linked to the library, so i have tried

g++ file.cpp $( GraphicsMagick++-config --cppflags --cxxflags --ldflags --libs ) -static

but it only generates the following errors

/usr/bin/ld.bfd.real: /usr/lib/gcc/x86_64-linux-gnu/4.6/crtbeginT.o: relocation R_X86_64_32 against `__DTOR_END__' can not be used when making a shared object; recompile with -fPIC
/usr/lib/gcc/x86_64-linux-gnu/4.6/crtbeginT.o: could not read symbols: Bad value
collect2: ld returned 1 exit status

adding -fPIC gives the same result.

I'm using the GraphicsMagick++ version that comes with the standard repository in Ubuntu 12.04 64 bit.

Since GraphicsMagick++ is a fork of ImageMagick some old trick for ImageMagick will probably work but i have never used ImageMagick, only GraphicsMagick++.

Answer 1

To link statically against that particular library, use -Wl,-Bstatic before it, ie:

g++ $( GraphicsMagick++-config --cppflags --cxxflags ) -fPIC file.cpp -o file -Wl,-Bstatic $( GraphicsMagick++-config --ldflags --libs )

If you then wanted to pass more libraries, and link dynamically against them, you can pass -Wl,-Bdynamic to switch back and add more libraries afterwards.

Edit : Also note the specific argument order. First compiler flags, then file, then linker flags and libraries at the end. With other order, you can run into random failures. Really.