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I would like to build PDAL with both together support for Python2 and Python3 bindings (on Ubuntu 16.04).

PDAL support is an OR statement

Fig. 1: Screenshot of the Python stuff within cmake-gui.

How could I achieve this?
If a re-compile with Python3 support I end up with such error message when installing, so I have to uninstall it before, which will uninstall the Python2 bindings... :

Selecting previously unselected package pdal-1.7.1-py3.
(Reading database ... 546498 files and directories currently installed.)
Preparing to unpack .../pdal-1.7.1-py3_20180920-1_amd64.deb ...
Unpacking pdal-1.7.1-py3 (20180920-1) ...
dpkg: error processing archive /opt/PDAL/build/pdal-1.7.1-py3_20180920-1_amd64.deb (--install):
 trying to overwrite '/usr/local/bin/pdal', which is also in package pdal-1.7.1 20180823-1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
 /opt/PDAL/build/pdal-1.7.1-py3_20180920-1_amd64.deb
/var/tmp/tmp.TeaEeCUL0y/dpkginstall.log (END)
  • I doubt your goal is achievable. Namespace collisions make it unlikely that this is possible. – Vince Sep 20 '18 at 11:38
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This is not currently possible because of the way PDAL embeds Python. A future release may change this situation, but PDAL at the moment compiles against the Python and Numpy headers and they cannot mix versions.

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