CMake Shared Library Quirk on 64 bit Linux

[jceipek]

Not sure whether this is a bug or not.

As I mentioned, I'm in the process of creating python wrappers for ShivaVG. While building these, I discovered a strange problem that only affects 64 bit Linux (I also tested this on 64 bit OS X and 32 bit Linux)

/usr/bin/ld: ../ShivaVG/src/libOpenVG.a(shPath.c.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC
../ShivaVG/src/libOpenVG.a: could not read symbols: Bad value

I got around this by adding the following to the bottom of CMakeLists.txt in the src directory:
SET_TARGET_PROPERTIES( OpenVG PROPERTIES COMPILE_FLAGS -fPIC)

based on http://www.cmake.org/pipermail/cmake/2006-September/011316.html

I haven't done much linking before, so I'm not very familiar with the process of making and using static and shared libraries. Is the -fPIC flag a silly thing to add in this case? Should I be linking against a shared library instead (which the current system doesn't generate)? Should it be part of the CMake system, and if so, where should it be?

[landswellsong]

Will look into it, thank you.