colcon build uses wrong version of python if a python version is built from source #1519
Description
Bug report
Required Info:
- Operating System:
- Ubuntu 22
- Installation type:
- binaries (apt)
- Version or commit hash:
- Hubmle
- DDS implementation:
- default eProsima’s Fast DDS.
Steps to reproduce issue
- Install python 3.6 from source
- Install python 3.10 from apt
- install ros2 humble
- build some c++ ros2 package
Expected behavior
colcon selects python 3.10
Actual behavior
colcon select python3.6
Additional information
Similar to #1421 but no vens are involved
python and pip both point to 3.10.
build output
Starting >>> px4_msgs
[Processing: px4_msgs]
[Processing: px4_msgs]
[Processing: px4_msgs]
[Processing: px4_msgs]
--- stderr: px4_msgs
/usr/bin/ld: /usr/local/lib/libpython3.6m.a(_sre.o): warning: relocation against `PyExc_RecursionError' in read-only section `.text'
/usr/bin/ld: /usr/local/lib/libpython3.6m.a(bytearrayobject.o): relocation R_X86_64_PC32 against symbol `_Py_NoneStruct' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: bad value
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/px4_msgs__rosidl_generator_py.dir/build.make:3386: rosidl_generator_py/px4_msgs/libpx4_msgs__rosidl_generator_py.so] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:475: CMakeFile
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