将选项传递给链接器时出现“使用 -fPIC 重新编译”错误

Question

我正在尝试用

编译this git-repository（分支：feature-pybind）

option(BUILD_PYTHON_BINDINGS "Whether or not a binary python module should be built" ON)

This is the output of the compilation，但有趣的是：

[100%] Linking CXX shared module pyVFRendering.cpython-34m.so
/usr/bin/cmake -E cmake_link_script CMakeFiles/pyVFRendering.dir/link.txt --verbose=1
/usr/bin/clang++  -fPIC   -shared  -o pyVFRendering.cpython-34m.so CMakeFiles/pyVFRendering.dir/python/vfrendering_bindings.cpp.o -flto libVFRendering.a qhull-prefix/src/qhull-build/libqhullcpp.a qhull-prefix/src/qhull-build/libqhullstatic_r.a 
/usr/bin/ld: libVFRendering.a(ArrowRenderer.cxx.o): relocation R_X86_64_32S against `glad_glGenVertexArrays' can not be used when making a shared object; recompile with -fPIC
libVFRendering.a: error adding symbols: Bad value
clang-3.8: error: linker command failed with exit code 1 (use -v to see invocation)
CMakeFiles/pyVFRendering.dir/build.make:97: recipe for target 'pyVFRendering.cpython-34m.so' failed
make[2]: *** [pyVFRendering.cpython-34m.so] Error 1
make[2]: Leaving directory '/home/matthias/VFRendering/build'
CMakeFiles/Makefile2:68: recipe for target 'CMakeFiles/pyVFRendering.dir/all' failed
make[1]: *** [CMakeFiles/pyVFRendering.dir/all] Error 2
make[1]: Leaving directory '/home/matthias/VFRendering/build'
Makefile:127: recipe for target 'all' failed
make: *** [all] Error 2
CC=clang: Kommando nicht gefunden    

很明显，我将 -fPIC 标志传递给 clang。我真的不明白错误信息。 ld在抱怨什么？我该如何解决这个问题？

Answer 1

您在链接时传递-fPIC，但在编译时可能不会。您也应该在编译时传递它。

我认为这里真正的问题是您似乎试图从几个静态库中创建一个共享库。这是不对的：你应该从目标文件中创建它（当然是用 -fPIC 编译的）。