Compiling kernel with gcc43
lobo at bsd.com.br
Thu Mar 25 16:24:13 UTC 2010
2010/3/24 Mario Lobo <lobo at bsd.com.br>
> 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:
> .if !empty(.CURDIR:M/usr/ports/*) && exists(/usr/local/bin/gcc43)
> libgcc_s.so.1 gcc43/libgcc_s.so.1
> libgomp.so.1 gcc43/libgomp.so.1
> libobjc.so.3 gcc43/libobjc.so.2
> libssp.so.0 gcc43/libssp.so.0
> libstdc++.so.6 gcc43/libstdc++.so.6
> 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/kern.mk, 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?
> Mario Lobo
Should I just dump the gcc43 idea and try this with clang/llvm?
I've seen http://wiki.freebsd.org/BuildingFreeBSDWithClang.
Anything else to watch out for when building world/kernel/ports?
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