Date: Thu, 25 Mar 2010 13:24:10 -0300 From: Mario Lobo <lobo@bsd.com.br> To: FreeBSD-Questions@freebsd.org Cc: freebsd-hackers@freebsd.org Subject: Re: Compiling kernel with gcc43 Message-ID: <9884b5281003250924i462eee68uf2a7eba7dd864033@mail.gmail.com> In-Reply-To: <201003242258.05830.lobo@bsd.com.br> References: <201003242258.05830.lobo@bsd.com.br>
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2010/3/24 Mario Lobo <lobo@bsd.com.br> > Hi; > > I followed the instructions from > http://www.freebsd.org/doc/en/articles/custom-gcc/article.html > > 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 > > 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? > > Thanks, > -- > Mario Lobo > > Any suggestions/Comments? 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? Thanks, -- Mario Lobo http://www.mallavoodoo.com.br FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!] (99,7% winfoes FREE)
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