[cfe-dev] [PATCH]: add support for FreeBSD
rdivacky at freebsd.org
Sat Oct 11 02:08:47 PDT 2008
> >>>I might ignite a discussion on the fbsd mailing list if we can
> >>>the sources to export these two numbers to be exported in some
> >>>header file.
> >>On darwin, we autodetect using the "approved system interfaces". The
> >>idea is that we want to be able to build a binary on darwin9 and have
> >>it run find on darwin10. The idea is that we want the compiler to
> >>default to generating code for the current OS, but that requires
> >>detecting it (since the build may have been done on a different one).
> >>Make sense?
> >well.. I could parse output of "touch dummy_file.c ; gcc -E -dM
> >to get the two defines. there's no other way to get this on runtime,
> >this an acceptable solution?
> I'm confused about why that would be useful. Worst case you could
> parse the output of 'system("uname -a")' or something, no? Presumably
> uname is implemented in terms of some library/system call, and that
> could just be used instead?
there's some confusion here...
we are talking about:
+ Define(Defs, "__FreeBSD__", "8");
+ Define(Defs, "__FreeBSD_cc_version", "800001");
the problem is that the second number is defined only in an internal freebsd
header file or can be obtained via "gcc -E -dM dummy_file.c", the __FreeBSD_cc_version
does not correspond to anything in uname.
so here's the plan. I'll convince people in the freebsd land to include this number
in some public header file and
to get the numbers, ok?
hope it's clear enough now :)
p.s. keep me CCed as I am not subscribed to the ML
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