SOLVED: Re: gcc-4.7.4: libgcc2.h:157: error: unable to emulate 'TF'

[Jan Nieuwenhuizen <janneke@gnu.org>]

U.Mutlu writes:

> Just a tip: you can build the compiler much faster if you use --disable-bootstrap
> (here it reduces the compile time from 111 minutes down to 12 minutes).
> After it's ok, then you can build w/o it to also test the
> bootstrapping.

Thanks!  I'm very grateful for your help.  I succeeded in building
gcc-4.7.4 from almost no binary seeds[0] for GuixSD!

The weird error in Subject was caused by configure+make (and my usage of
configure flags, environment settings) trying to use CC_FOR_BUILD (the
i368-unknow-linux-gcc 2.95.3 compiler) to build libgcc2.c

Here's the configure that I used, which works.

../build/configure\
 --build=i686-unknown-linux-gnu\
 --host=i686-unknown-linux-gnu\
 --with-native-system-header-dir=/gnu/store/lwadx3lm73f8rmy8cvwijrflb9wgcm7j-glibc-mesboot-2.2.5/include\
 --with-build-sysroot=/gnu/store/lwadx3lm73f8rmy8cvwijrflb9wgcm7j-glibc-mesboot-2.2.5/include\
 --prefix=/gnu/store/bci6j4dfrmkfzqbpbbcz5ypk8xmr0j5z-gcc-mesboot-4.7.4\
 --disable-bootstrap\
 --disable-decimal-float\
 --disable-libatomic\
 --disable-libcilkrts\
 --disable-libgomp\
 --disable-libitm\
 --disable-libmudflap\
 --disable-libquadmath\
 --disable-libsanitizer\
 --disable-libssp\
 --disable-libvtv\
 --disable-lto\
 --disable-lto-plugin\
 --disable-multilib\
 --disable-plugin\
 --disable-shared\
 --disable-threads\
 --enable-languages=c\
 --enable-static\
 --enable-threads=single\
 --disable-libstdc__-v3\
 --disable-libstdcxx-pch\
 --disable-build-with-cxx

Greetings,
janneke

[0] http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/mes.scm?h=wip-bootstrap

-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
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