diff options
Diffstat (limited to 'config/python.m4')
| -rw-r--r-- | config/python.m4 | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/config/python.m4 b/config/python.m4 index b95c8ed3b34..b8d5b890b22 100644 --- a/config/python.m4 +++ b/config/python.m4 @@ -6,10 +6,17 @@ # PGAC_PATH_PYTHON # ---------------- -# Look for Python and set the output variable 'PYTHON' -# to 'python' if found, empty otherwise. +# 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], -[AC_PATH_PROG(PYTHON, python) +[AC_PATH_PROGS(PYTHON, [python python3 python2]) if test x"$PYTHON" = x""; then AC_MSG_ERROR([Python not found]) fi |