Re: HEADS UP: Ports are not ready for CFLAGS=-O2 in 6.0

From: Dag-Erling Smørgrav (des_at_des.no)
Date: 11/05/04

  • Next message: Kris Kennaway: "Re: HEADS UP: Ports are not ready for CFLAGS=-O2 in 6.0" 
    To: Kris Kennaway <kris@obsecurity.org>
Date: Fri, 05 Nov 2004 23:43:30 +0100

    Kris Kennaway <kris@obsecurity.org> writes:
    > On Fri, Nov 05, 2004 at 04:56:03PM -0500, Michael Johnson wrote:
    > > Is there a list of what's broke with -O2 in ports anywhere?
    > Some of the bugs are probably silent. For example, different versions
    > of gcc sometimes have bugs at higher optimization levels or with
    > certain CPUTYPE values.

    As far as we know, that is not the case for FreeBSD 5.3 and 6.0.

    > -O2 will also cause build errors in other ways, e.g. if functions in a
    > library are improperly declared static and not referenced internally
    > (but are referenced externally by another application trying to link
    > with the library), since -O2 may optimize them out completely.

    That's crap. You can't reference a static symbol outside your own
    compilation unit. That's the whole point with declaring it static.

    The problem with arj is that it uses a tool to embed a checksum in
    each binary, and the placeholder for that checksum was declared static
    but never referenced, so gcc optimized it out and the tool couldn't
    find it.

    DES 

    -- 
Dag-Erling Smørgrav - des@des.no
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  • Next message: Kris Kennaway: "Re: HEADS UP: Ports are not ready for CFLAGS=-O2 in 6.0"

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