I'm working on issue 4111 which will add dtrace support to Python when
requested by the builder and when supported by the platform (currently just
Solaris and Mac OSX I believe).
Sun and Apple have quite different ways to generate the code necessary to
link into the executable. Sun's dtrace command supports a -G flag which
generates a .o file from a .d file. Apple instead generates an include file
using the -h flag to dtrace (-G and .o file generation are not supported).
This puts a bit of a crimp in generating Makefile dependencies. In the Sun
case you have a couple extra .o files to link into libpython. In the Apple
case you have a couple extra .h files which define Dtrace macros.
How do I work around this difference in Makefile.pre.in? I can detect Sun
vs. Apple in the configure script, but I see no conditional logic in
Makefile.pre.in to use as an example. It seems to only use variable
expansion on the RHS of stuff. Can I do something like
if @WITH_DTRACE_SUN@ = 1
then
... Sun-style dependencies here ...
else
... Apple-style dependencies here ...
fi
where WITH_DTRACE_SUN is a macro defined in pyconfig.h by the configure
script?
Thanks,
Skip
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