Regression in `sysconfig.get_config_var('EXT_SUFFIX')`

[pitrou]

With 3.7.3:

$ python3 -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'))"
.cpython-37m-x86_64-linux-gnu.so

With 3.7.4:

$ python3 -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'))"
7.4.0
.cpython-@PYVERNODOTS@m-x86_64-linux-gnu.so

This breaks Arrow's build configuration, possibly others.

[pitrou]

Same junk in other config vars:

• Ubuntu Python:

  $ /usr/bin/python3 -c "import sysconfig; print(sysconfig.get_config_var('LIBPL'))"
  /usr/lib/python3.6/config-3.6m-x86_64-linux-gnu
  $ /usr/bin/python3 -c "import sysconfig; print(sysconfig.get_config_var('LIBS'))"
  -lpthread -ldl  -lutil

  Anaconda Python:

  $ python3 -c "import sysconfig; print(sysconfig.get_config_var('LIBPL'))"
  7.4.0
  /home/antoine/miniconda3/envs/pyarrow/lib/python3.7/config-3.7m-x86_64-linux-gnu
  $ python3 -c "import sysconfig; print(sysconfig.get_config_var('LIBS'))"
  7.4.0
  -lpthread -ldl -lutil -lrt

[pitrou]

@jjhelmus @mingwandroid

[jjhelmus]

There are some issues with the Python 3.7.4 build. We are aware of these and working to fix them. This work is being tracked at ContinuumIO/anaconda-issues#11195.