Compiling kernel with gcc43

Mario Lobo lobo at
Thu Mar 25 16:24:13 UTC 2010

2010/3/24 Mario Lobo <lobo at>

> Hi;
> I followed the instructions from
> to see if I can achieve some performance gain (8-STABLE r205630 amd64) and
> also get a more modern instruction set for my Phenom II (amdfam10), so I've
> done the following config settings:
> make.conf
> .if !empty(.CURDIR:M/usr/ports/*) && exists(/usr/local/bin/gcc43)
> CC=/usr/local/bin/gcc43
> CXX=/usr/local/bin/g++43
> CPP=/usr/local/bin/cpp43
> CFLAGS+=-mssse3
> CPUTYPE=amdfam10
> .endif
> libmap.conf
>   gcc43/
>    gcc43/
>    gcc43/
>     gcc43/
>  gcc43/
> buildworld goes on normally it seems, but when I tried to build the kernel,
> the first stop came from the option used by the kernel build "-fformat-
> extensions", which is not accepted by gcc43, so I took it out of
> /usr/src/sys/conf/, the ONLY place I found it.
> It seemed to solve the problem until gcc43 stopped because of the "-Werror"
> option, which is all over the place!. Funny that gcc42 (used by default)
> doesn't stop because of this option.
> Anyway,my question boils down to: Is there a way to build the kernel with
> gcc43, with minimal tweaking? Am i attempting something out of my league?
> Thanks,
> --
> Mario Lobo
Any suggestions/Comments?

Should I just dump the gcc43 idea and try this with clang/llvm?

I've seen

Anything else to watch out for when building world/kernel/ports?

Mario Lobo
FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!] (99,7% winfoes FREE)

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