Unable to build with gcc 7.2

[rahulsidhu]

Not sure if this is open for outside feedback but just in case: I was unable to build this with the latest gcc 7.2 (ArchLinux) due to linker errors:

/usr/bin/ld: ../../src/reference/libdrawsvgref.a(viewport.cpp.o): relocation R_X86_64_32 against .bss' can not be used when making a shared object; recompile with -fPIC /usr/bin/ld: ../../src/reference/libdrawsvgref.a(texture.cpp.o): relocation R_X86_64_32 against symbol _ZSt4cerr@@GLIBCXX_3.4' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: ../../src/reference/libdrawsvgref.a(software_renderer.cpp.o): relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output

I guess the reference code for the libdrawsvgref would need to be recompiled with an -fPIC flag.

FWIW, I was able to build fine with gcc 5.4 (ubuntu 16.04)

[hryniuk]

To @rahulsidhu and others coping with this issue: I've modified the code a bit and I've added a flag in CMakeLists.txt to disable linking with reference solution (Reference renderer in binary is just another copy of Imp renderer). It's available here: https://github.com/hryniuk/DrawSVG

Among a few solutions I've come up with, i.e.:

• building it inside Docker/Virtualbox (coping with problems like file sharing and library compatibility)
• installing older GCC
• using someone else solution from the Net as a reference (there are several of them, but most that I've tried are incomplete or have slightly different interfaces - private methods)

...this one seems to be the easiest to get and start working on Assignment 1.

Linking with reference can be enabled by setting BUILD_REFERENCE flag to ON here:
https://github.com/hryniuk/DrawSVG/blob/d964aa01161d833e4aced173b0105b91e3a7b0ab/CMakeLists.txt#L13

[apjaffe]

See https://piazza.com/class/jcgp5uqmriq8b?cid=43 for updated libdrawsvgref