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configure: Update python search order

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Some systems don't ship with "python" by default anymore, only
"python3" or "python2" or some combination, so include those in the
configure search.

Discussion: https://www.postgresql.org/message-id/flat/1457.1543184081%40sss.pgh.pa.us#c9cc1199338fd6a257589c6dcea6cf8d
This commit is contained in:
Peter Eisentraut
2019-01-11 15:45:15 +01:00
parent 0acb3bc33a
commit 7291733ac9
3 changed files with 11 additions and 3 deletions
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9
config/python.m4
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@ -8,8 +8,15 @@
# ----------------
# Look for Python and set the output variable 'PYTHON' if found,
# fail otherwise.
#
# As the Python 3 transition happens and PEP 394 isn't updated, we
# need to cater to systems that don't have unversioned "python" by
# default. Some systems ship with "python3" by default and perhaps
# have "python" in an optional package. Some systems only have
# "python2" and "python3", in which case it's reasonable to prefer the
# newer version.
AC_DEFUN([PGAC_PATH_PYTHON],
[PGAC_PATH_PROGS(PYTHON, python)
[PGAC_PATH_PROGS(PYTHON, [python python3 python2])
if test x"$PYTHON" = x""; then
AC_MSG_ERROR([Python not found])
fi