Failed building wheel for flightgym

[yun-long]

 CMake Error: The current CMakeCache.txt directory /tmp/pip-req-build-or5x44y6/externals/pybind11/CMakeCache.txt is different than the directory /home/sysadmin/GitHub/flightmare/flightlib/externals/pybind11 where CMakeCache.txt was created. This may result in binaries being created in the wrong place. If you are not sure, reedit the CMakeCache.txt
  CMake Error at cmake/pybind11.cmake:16 (message):
    Download of Pybind11 failed: 1
  Call Stack (most recent call first):
    CMakeLists.txt:45 (include)

[yun-long]

cd flightmare/flightlib/externals
rm -rf *
cd flightmare/flightlib/
pip install .

[samaila53]

Hi, after following the flightmare install steps , i get this error:

Building wheels for collected packages: flightgym
Building wheel for flightgym (setup.py) ... error
ERROR: Command errored out with exit status 1:
command: /home/sam/anaconda3/envs/quad/bin/python -u -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/home/sam/Bureau/flightmare/flightlib/setup.py'"'"'; file='"'"'/home/sam/Bureau/flightmare/flightlib/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(file) if os.path.exists(file) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, file, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-m2jlvmei
cwd: /home/sam/Bureau/flightmare/flightlib/
Complete output (106 lines):
running bdist_wheel
running build
running build_ext
Removing some cache file: /home/sam/Bureau/flightmare/flightlib/build/temp.linux-x86_64-3.6
-- The C compiler identification is GNU 11.3.0
-- The CXX compiler identification is GNU 11.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- ====================== !Flightmare! ======================
-- ======> Setup Dependencies
-- Using system provided Eigen.
/usr/include/eigen3
-- Eigen3 include dir: /usr/include/eigen3
-- Getting Pybind11...
Cloning into 'pybind11-src'...
error: RPC failed; curl 56 GnuTLS recv error (-54): Error in the pull function.
error: 3262 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output
Cloning into 'pybind11-src'...
error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: CANCEL (err 8)
error: 1511 bytes of body are still expected
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: fetch-pack: invalid index-pack output
Cloning into 'pybind11-src'...
Already on 'master'
-- Pybind11 downloaded!
-- pybind11 v2.12.0 dev1
-- Found PythonInterp: /home/sam/anaconda3/envs/quad/bin/python (found suitable version "3.6.13", minimum required is "3.6")
-- Found PythonLibs: /home/sam/anaconda3/envs/quad/lib/libpython3.6m.so
-- Performing Test HAS_FLTO
-- Performing Test HAS_FLTO - Success
-- Getting yaml-cpp...
-- Yaml downloaded!
-- Found OpenCV: /usr (found version "4.5.4")
-- Found OpenMP_C: -fopenmp (found version "4.5")
-- Found OpenMP_CXX: -fopenmp (found version "4.5")
-- Found OpenMP: TRUE (found version "4.5")
INFOBuild time could be improved with ccache!
INFO sudo apt install ccache
-- ======> Setup Compilation
-- Enabling fast optimization flags!
-- The activated CXX RELEASE configuration is:
-DVERSION_INFO="0.0.1" -fPIC -Wall -DNDEBUG -fopenmp -Ofast -march=native
-- The activated CXX DEBUG configuration is:
-DVERSION_INFO="0.0.1" -fPIC -Wall -g -fopenmp
-- ======> Setup Build
-- Getting gtests...
Cloning into 'googletest-src'...
fatal: invalid reference: master
CMake Error at googletest-download/googletest-prefix/tmp/googletest-gitclone.cmake:40 (message):
Failed to checkout tag: 'master'

gmake[2]: *** [CMakeFiles/googletest.dir/build.make:98: googletest-prefix/src/googletest-stamp/googletest-download] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/googletest.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2
CMake Error at cmake/gtest.cmake:17 (message):
Build step for googletest failed: 2
Call Stack (most recent call first):
CMakeLists.txt:192 (include)

-- Configuring incomplete, errors occurred!
See also "/home/sam/Bureau/flightmare/flightlib/build/temp.linux-x86_64-3.6/CMakeFiles/CMakeOutput.log".
Traceback (most recent call last):
File "", line 1, in
File "/home/sam/Bureau/flightmare/flightlib/setup.py", line 106, in
zip_safe=False,
File "/home/sam/anaconda3/envs/quad/lib/python3.6/site-packages/setuptools/init.py", line 153, in setup
return distutils.core.setup(**attrs)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/core.py", line 148, in setup
dist.run_commands()
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/dist.py", line 955, in run_commands
self.run_command(cmd)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/sam/anaconda3/envs/quad/lib/python3.6/site-packages/wheel/bdist_wheel.py", line 299, in run
self.run_command('build')
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/command/build.py", line 135, in run
self.run_command(cmd_name)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/home/sam/Bureau/flightmare/flightlib/setup.py", line 59, in run
self.build_extension(ext)
File "/home/sam/Bureau/flightmare/flightlib/setup.py", line 89, in build_extension
cmake_args, cwd=self.build_temp, env=env)
File "/home/sam/anaconda3/envs/quad/lib/python3.6/subprocess.py", line 311, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['cmake', '/home/sam/Bureau/flightmare/flightlib', '-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=/home/sam/Bureau/flightmare/flightlib/build/lib.linux-x86_64-3.6/', '-DPYTHON_EXECUTABLE=/home/sam/anaconda3/envs/quad/bin/python', '-DCMAKE_BUILD_TYPE=Release']' returned non-zero exit status 1.

ERROR: Failed building wheel for flightgym

Ho do solve it?

[savvas-ap]

I have found this issue that has helped me to overcome the specific problem (the file you need is in flightmare/flightlib/cmake/gtest_download.cmake), however, there is another is another problem after that (specifically:

fatal error: zmqpp/zmqpp.hpp: No such file or directory
19 | #include <zmqpp/zmqpp.hpp>
| ^~~~~~~~~~~~~~~~~
compilation terminated.
).
google/googletest#3663

Has anyone found a global solution on this issue?

[omarmradi]

Step 1:
vi /home/omar/flightmare/flightlib/cmake/gtest_download.cmake
change MASTER to MAIN

as per google/googletest#3663

Step 2:
git clone https://github.com/zeromq/zmqpp.git
cd zmqpp
make
make check
sudo make install
make installcheck

Step 3:
cd ../flightlib
pip install . --verbose

[savvas-ap]

@omarmradi thank you very much!
I also leave here this issue, that helped me solve the problem appeared later on, in case that it helps someone else too:
zeromq/zmqpp#246