[MacPorts] #44188: clang-*: fix python usage.

[MacPorts]

#44188: clang-*: fix python usage.
-------------------------+-------------------------------------------------
 Reporter:  ionic@…      |      Owner:  macports-tickets@…
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:  haspatch     |       Port:  clang-2.9 clang-3.0 clang-3.1
                         |  clang-3.2 clang-3.3 clang-3.4 clang-3.5
-------------------------+-------------------------------------------------
 Updating my system in trace mode, I found that `clang-3.3` wouldn't build.

 The default variant is `python27`. This is also adding `--with-
 python=${prefix}/bin/python$PYTHON_VERSION` to `configure.args`.

 However, `port:python${python_ver}` was only added as a runtime dependency
 and thus shadowed at build time due to trace mode. As arguments given to
 `configure` via `--with-*` are fatal errors when not found, `configure`
 failed.

 While the other ports (anything but 3.3) don't specify `--with-python`,
 let us fix them still.

 * '''`clang-2.9`''': add build time dependency on the via variant selected
 python version.
 * '''`clang-3.0`''': see above
 * '''`clang-3.1`''': see above
 * '''`clang-3.2`''': see above
 * '''`clang-3.3`''': add build time dependency on the via variant selected
 python version. Here, a failure to do so is actually fatal.
 * '''`clang-3.4`''': move dependency on `port:python27` to lib
 dependencies. Also add `--with-python` as in clang-3.3. Revbump.
 * '''`clang-3.5`''': see above

 (Note that `--with-python` has been introduced with clang 3.4.)

 I will upload individual patches and a big, merged one. Take whatever you
 like.

-- 
Ticket URL: <https://trac.macports.org/ticket/44188>
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