Build breaks on FreeBSD: it needs -fPIC

[yurivict]

got version from file /wrkdirs/usr/ports/devel/py-llvmlite/work-py36/llvmlite-0.31.0/llvmlite/_version.py {'version': '0.31.0', 'full': 'fe7d985f6421d87f613bd414479d29d912771562'}
running build_ext
/usr/local/bin/python3.6 /wrkdirs/usr/ports/devel/py-llvmlite/work-py36/llvmlite-0.31.0/ffi/build.py
LLVM version... clang++ -std=c++11 -stdlib=libc++ -shared -I/usr/local/llvm80/include -std=c++11 -fno-exceptions -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -fno-rtti -g assembly.cpp bitcode.cpp core.cpp initfini.cpp module.cpp value.cpp  executionengine.cpp transforms.cpp passmanagers.cpp targets.cpp dylib.cpp  linker.cpp object_file.cpp -o libllvmlite.so -L/usr/local/llvm80/lib -lLLVM-8
ld: error: can't create dynamic relocation R_X86_64_64 against local symbol in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output

using cmake to build

llvmlite-0.31.0

[stuartarchibald]

Thanks for the report. I'm not sure what the build target is from the above (wheel-like?!) if so perhaps add pic = sys.platform.startswith(('linux', 'freebsd','openbsd')) here:

llvmlite/setup.py

Line 130 in eaa3412

pic = sys.platform.startswith('linux')

?
if that fixes it please let us know, thanks.

[nehaljwani]

I was trying to build llvmlite-v0.30.0 with a build of llvmdev-v8.0.0 (both built using devtoolset-2) and faced the same error on Linux as well. I ended up exporting CXXFLAGS="${CXXFLAGS-} -fPIC"

I am not sure why you are doing it only for building a wheel. In both cases you want to shove object files into a shared library, so they need to have position independent code (at least on Linux).

You do not see this problem with the conda recipe because the activation scripts for the compilers inject -fPIC by default:
https://github.com/AnacondaRecipes/ctng-compiler-activation-feedstock/blob/f9ee66fe68bd6ffacb59894065f2614d8215891f/recipe/conda_build_config.yaml#L29

[karolyi]

+1 here, related to #522

[gmarkall]

Closing this issue as build with -fPIC on FreeBSD was added in #627.