On 1/17/2012 3:52 PM, Rolf Eike Beer wrote:
Brad King wrote:
Can this use the version argument to find_package? If a project's
python code works only with 2 or only with 3 why bother even looking
for other versions?
No, it can not. This argument gives either a minimum version, or an exact
version. This way it is impossible to specify that any 2.x version would
match.
Actually the find_package command documents that argument as
"The [version] argument requests a version with which the
package found should be compatible"
so it is looking for compatible versions, not greater versions.
The meaning of "compatible" is package-specific. That's why each
Find module needs to do its own test, or in Config mode it checks
for the FooConfigVersion.cmake file and uses that to do the test.
Therefore I would expect
find_package(PythonInterp 2)
to find a python interpreter compatible with version 2, which does
not include version 3. You just can't use the normal version
check from the standard find helper module.
> It would be enough for 3.x versions, but for that this module has to be
fixed to actually find 3.x versions at all.
Shouldn't that be part of this fix?
-Brad
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