As described in the previous section, PC_INIT finds the
Python interpreter with the highest version that meets the provided
requirements. You may wish to perform other tests on the version
number yourself. There is a macro available to simplify this,
PC_PYTHON_VERIFY_VERSION (indeed, PC_INIT uses this
macro internally).
m4_define(python_min_ver, 2.6.1)
PC_PYTHON_VERIFY_VERSION([>=], python_min_ver, ,
[AC_MSG_ERROR(Python interpreter too old)])
In this example, we set the minimum version to 2.6.1 through the use
of an M4 macro. We then check if the interpreter stored in the
PYTHON variable (either set by the user or found by
PC_INIT) is at least of that version. If it is not, the
resulting configure script will exit with an appropriate error
message. You may use any mathematical comparison operator that Python
recognizes for the first argument (“==”, “<=”, “>”, etc.).