Carl Shapiro wrote:
Kris & Julian
Thank you for clarifiying the compatibility situation. This
information was exactly what I was looking for.
I have a follow-up question based on this remark...
On 5/5/08, Kris Kennaway <[EMAIL PROTECTED]> wrote:
Actually we don't attempt to keep this form of ABI compatibility (running
6.3 binaries on 6.0, for example), because it basically precludes ever
adding new functions to libc within a branch, or new syscalls to the kernel.
You are correct that often binaries will not notice these accumulated
changes though, or can be carefully constructed to avoid them.
If my binary only executes system calls indirectly through libc
interfaces, as far as libc and libm are concerned, are new symbols the
only thing I need to worry about?
Not necessarily. For example, the DNS resolver library was updated
between FreeBSD 6.1 and 6.2 to bind 9's resolver library, resulting in
the disappearance of the _res symbol in 6.2. As long as you depend only
on public interfaces, though, you should be fine.
Guy
--
Guy Helmer, Ph.D.
Chief System Architect
Palisade Systems, Inc.
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