Additional Python API in pre-build carla package？

[simon-zy]

CARLA version: 0.9.12 Platform/OS: ubuntu 18.04 Problem you have experienced: I am building carla PythonAPI on a ubuntu 18.04 machine with python version default to 3.6. I encountered the following error:

BuildPythonAPI.sh: Building Python API for Python 3.6.
compiling:
  - source/libcarla/libcarla.cpp
running bdist_egg
running egg_info
writing source/carla.egg-info/PKG-INFO
writing dependency_links to source/carla.egg-info/dependency_links.txt
writing top-level names to source/carla.egg-info/top_level.txt
reading manifest file 'source/carla.egg-info/SOURCES.txt'
writing manifest file 'source/carla.egg-info/SOURCES.txt'
installing library code to build/bdist.linux-x86_64/egg
running install_lib
running build_py
running build_ext
building 'carla.libcarla' extension
clang-8 -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -Idependencies/include -I/usr/include/python3.6m -c source/libcarla/libcarla.cpp -o build/temp.linux-x86_64-3.6/source/libcarla/libcarla.o -isystem dependencies/include/system -fPIC -std=c++14 -Werror -Wall -Wextra -Wpedantic -Wno-self-assign-overloaded -Wdeprecated -Wno-shadow -Wuninitialized -Wunreachable-code -Wpessimizing-move -Wold-style-cast -Wnull-dereference -Wduplicate-enum -Wnon-virtual-dtor -Wheader-hygiene -Wconversion -Wfloat-overflow-conversion -DBOOST_ERROR_CODE_HEADER_ONLY -DLIBCARLA_WITH_PYTHON_SUPPORT -DLIBCARLA_IMAGE_WITH_PNG_SUPPORT=true
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.6/source/libcarla/libcarla.o -Ldependencies/lib -o build/lib.linux-x86_64-3.6/carla/libcarla.cpython-36m-x86_64-linux-gnu.so /data/proj/carla/PythonAPI/carla/dependencies/lib/libcarla_client.a /data/proj/carla/PythonAPI/carla/dependencies/lib/librpc.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libboost_filesystem.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libRecast.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libDetour.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libDetourCrowd.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libosm2odr.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libxerces-c.a -lz /data/proj/carla/PythonAPI/carla/dependencies/lib/libproj.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libsqlite3.a /data/proj/carla/PythonAPI/carla/dependencies/lib/libboost_python36.a -lpng -ljpeg -ltiff -lstdc++
/usr/bin/ld: /data/proj/carla/PythonAPI/carla/dependencies/lib/libproj.a(geodesic.c.o): relocation R_X86_64_32S against `.rodata.cst8' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /data/proj/carla/PythonAPI/carla/dependencies/lib/libproj.a(wkt1_generated_parser.c.o): relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /data/proj/carla/PythonAPI/carla/dependencies/lib/libproj.a(wkt2_generated_parser.c.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
collect2: error: ld returned 1 exit status
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
Util/BuildTools/Linux.mk:87: recipe for target 'PythonAPI' failed
make: *** [PythonAPI] Error 1

I looked up in the Setup.sh file and found that libproj.a is already built with the -fPIC flag, so what is the reason of the error above? Or alternatively, could you provide more versions of the PythonAPI in the pre-build package(like python 3.6, 3.8, etc)? I'm sorry if my English would confuse you.

[JerryMazeyu]

How to solve? I have the same problem.

[noobC7]

I met exactly the same issue.

[gawinwong]

Same problem, could someone solve this problem?

[gawinwong]

I solve the problem by remove anaconda3 and use python 3.6.9.

rm -rf Build
make setup
make launch
make PythonAPI

[ushio2021]

Possible Solution: Replace the build options for PROJ in setup.sh and make PythonAPI again: "-fPIC" --> "-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true"

I cannot understand the exact reason (maybe -fPIC is not used?) but I have built the egg file without those errors anymore and it can be imported into Python successfully.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.