build: Tune M4 macros for our needs.

* m4/ax_python_devel.m4: Do not emit 'HAVE_PYTHON'.
* m4/python.m4 (_AM_PYTHON_INTERPRETER_LIST): Add newer Python
versions, drop older ones.  Also, sort the list with older versions at
the front, newer and generic versions towards the end.  This makes the
algorithm pick the lowest version that meets the version requirement.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2017-03-09 16:55:18 +01:00
parent 067da472f9
commit 5189c08af9
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2 changed files with 7 additions and 4 deletions

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@ -195,8 +195,11 @@ EOD`
fi
# Make the versioning information available to the compiler
AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
[If available, contains the Python version number currently in use.])
# JW: We don't need it and it interferes with the hack
# to detect multiple Pyhton versions
#AC_DEFINE_UNQUOTED([HAVE_PYTHON], ["$ac_python_version"],
# [If available, contains the Python version number currently in use.])
# First, the library directory:
ac_python_libdir=`cat<<EOD | $PYTHON -

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@ -37,8 +37,8 @@ AC_DEFUN([AM_PATH_PYTHON],
dnl Find a Python interpreter. Python versions prior to 2.0 are not
dnl supported. (2.0 was released on October 16, 2000).
m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
[python python2 python3 python3.3 python3.2 python3.1 python3.0 python2.7 dnl
python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])
[python2.7 python2 python3.0 python3.1 python3.2 python3.3 python3.4 dnl
python3.5 python3.6 python3.7 python3.8 python3 python])
AC_ARG_VAR([PYTHON], [the Python interpreter])