Date: Thu, 12 Jul 2001 08:29:59 +1000 From: Peter Jeremy <peter.jeremy@alcatel.com.au> To: "Bruce A. Mah" <bmah@packetdesign.com> Cc: hackers@FreeBSD.ORG Subject: Re: Development for older FreeBSD releases Message-ID: <20010712082959.B506@gsmx07.alcatel.com.au>
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On Wed, 11 Jul 2001 14:13:36 -0700, bmah@packetdesign.com (Bruce A. Mah) wrote:
>I need to make an executable to run on an i386 box running FreeBSD 2.2.X
>machine. Unfortunately, it has no compiler installed on it.
...
>Is it even possible to try doing a "cross-compile" to such an old
>version of FreeBSD? (I'm primarily thinking of a.out vs. ELF issues...a
>quick experiment already informed me that I'm lacking an appropriate
>crt0.o.)
At least the later 2.2.x kernels can run ELF executables. I'm not
sure when ELF was added, but it was before 2.2.5. I can build a
trivial[1] static executable using the -CURRENT toolchain and run it
on a 2.2.5 machine. I can't quickly test a dynamic executable (I'd
need to copy the ELF loader and shared libraries onto my 2.2.5 system).
>Or am I better off trying somehow to build up a 2.2.X machine to do
>development on?
It is possible to do a buildworld of RELENG_2_2 on a -CURRENT system
when chroot'd into a 2.2.5 userland. (Unfortunately, this won't help
you since you need the 2.2.x compiler). About 6 months ago, I tried
and failed to get a RELENG_2_2 buildworld to work using the -CURRENT
toolchain, though it should be possible to build the 2.2.x compiler
on -CURRENT.
As Greg Black stated, your easiest option would be to use a 2.2.x
CD-ROM. If you don't have the CD-ROM's and are just missing the
compiler, I'd be happy to e-mail you a copy of cc, cc1, as and ld
for any 2.2.x-RELEASE.
[1] main() { printf("Hello World\n"); }. Non-trivial programs will
run into syscall incompatibilities - the most obvious being the
signal() changes just under 2 years ago.
Peter
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