Dan Mick writes:
> Roland Mainz wrote:
> > Hi!
> >
> > ----
> >
> > Does anyone know why "-fno-unit-at-a-time" is used for gcc in OS/Net
> > (http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/tools/cw/cw.c#510
> > just uses it without any comments... ;-( ) ?
>
> I'm only guessing: functions and variables can get reordered or even
> omitted. There are bound to be consequences somewhere for that.
Actually, it does have comments. The comments say this:
/*
* For gcc-3.4.x at -O2 we
* need to disable optimizations
* that break ON.
*/
This seems to date back to the 1.1 version of the file. I suspect a
big reason for doing this is that unit-at-a-time causes the compiler
to generate non-standard calling sequences for static functions, and
that's likely to wreak havoc with dtrace.
Googling on "gcc unit-at-a-time" provides a lot of hits. Maybe it'd
make a good domain name ...
--
James Carlson, Solaris Networking <[EMAIL PROTECTED]>
Sun Microsystems / 1 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
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