This is a full optparse-based parser for all the options we want
to have in Ophis 2.0, but the pass-disablers aren't working yet.
This also doesn't handle positional arguments the way we hope
to eventually; that will come later.
optparse is deprecated in 2.7, but its replacement isn't available
in any previous version of Python, so we avoid it so as to not
gratuitously break compatibility on older machines.
It would be nice to at least stay usable on stock Leopard Macs (2.5).
Includes the py2exe script, the version of the MSVC++ runtime Python 2.7
needs, and an NSIS script to assemble the installables out of the checkout
tree.
NB: Even though MakeNSIS is multiplatform, it should only be run on
Windows, since otherwise the linebreaks in the README won't be
Notepad-friendly.
As part of this change, all assembler chat is being pushed to
standard error, where it probably should have been in the first place.
Scripts and batchfiles that relied on capturing the output of Ophis
will need to capture stderr now instead.
This pass actually isn't an optimizer in that it produces larger
binaries when it triggers. However, the larger binaries created
will actually assemble properly.
The ExtendBranches pass detects Relative instructions (that is,
branches) that extend past the signed-8-bit range Relative instructions
permit, and replaces them with a branch-jump combination with identical
semantics.
Since this may be evidence of a program bug, Ophis will warn when
the optimization is triggered.
Due to similarities between this pass and UpdateLabels, both passes
have been refactored in passing.
