by caglar@10ur.org:

Seems like
https://code.google.com/p/go/source/detail?r=a61065d9bf0b80871d2f7da88b77d4a6a36bc675
break linux/386 build

I just updated to current tip

# hg tip
changeset:   15752:341af22f160e
tag:         tip
user:        Russ Cox <rsc@golang.org>
date:        Fri Feb 15 11:32:31 2013 -0500
summary:     exp/cookiejar: fix windows builder

# ./make.bash 
# Building C bootstrap tool.
cmd/dist

# Building compilers and Go bootstrap tool for host, linux/386.
lib9
libbio
libmach
misc/pprof
cmd/addr2line
cmd/cov
cmd/nm
cmd/objdump
cmd/pack
cmd/prof
cmd/cc
cmd/gc
cmd/8l
cmd/8a
cmd/8c
cmd/8g
pkg/runtime
/opt/go/src/pkg/runtime/signal_linux_386.c:131 function args not checked:
runtime.sigaction
/opt/go/src/pkg/runtime/thread_linux.c:182 sizeof undefined type
go tool dist: FAILED: /opt/go/pkg/tool/linux_386/8c -F -V -w -I $WORK -D GOOS_linux -D
GOARCH_386 -o $WORK/thread_linux.o /opt/go/src/pkg/runtime/thread_linux.c