id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
4453	Multilib: 6.23 gcc instructions useless	thomas	lfs-book	"In 6.23 we do a 
{{{
sed -e '/m64=/s/lib64/lib/' \
    -i.orig gcc/config/i386/t-linux64
cat > gcc/config/i386/t-linux64 <<""EOF""
comma=,
MULTILIB_OPTIONS    = $(subst $(comma),/,$(TM_MULTILIB_CONFIG))
MULTILIB_DIRNAMES   = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS)))
MULTILIB_OSDIRNAMES = m64=../lib$(call if_multiarch,:x86_64-linux-gnu)
MULTILIB_OSDIRNAMES+= m32=../lib32$(call if_multiarch,:i386-linux-gnu)
MULTILIB_OSDIRNAMES+= mx32=../libx32$(call if_multiarch,:x86_64-linux-gnux32)
EOF
}}}

which is useless. First we do a sed but then, we recreate the whole file via cat<<EOF. The two statements could be replaced/simplified by

{{{
sed -e '/m64=/s/lib64/lib/'  \
    -e '/m32=/s/m32=.*/m32=..\/lib32$(call if_multiarch,:i386-linux-gnu)/' \
    -i.orig gcc/config/i386/t-linux64
}}}

Same in chap 5.5 (gcc-pass1) and 5.11 (gcc-pass2)
"	task	closed	normal	9.0	Book	multilib	normal	fixed