On Fri, 15 Jun 2018, Anmol Mishra wrote:
https://pastebin.com/gDiMCEpC
https://github.com/Shopify/pyoozie/blob/master/Makefile
What actually is my_cmd.python.2 and my_cmd.python.3 really do.
In these, What actually is happening in these lines?
1. python_version_full := $(wordlist 2,4,$(subst ., ,$(shell python
--version 2>&1)))
2. python_version_major := $(word 1,${python_version_full}
This is GNU make specific syntax (not portable) and so you should
consult the GNU make manual.
As a quick check you can add something this at the bottom of the
Makefile to see what these variables end up being defined to:
test_vars:
echo $(python_version_full)
echo $(python_version_major)
and then do
make test_vars
to see what gets printed.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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