Hi, when i did lfs installation, i got an error. http://lfs.osuosl.org/lfs/view/development/chapter06/psmisc.html previously i did bug posting to gcc-bugs list. http://gcc.gnu.org/ml/gcc-bugs/2005-03/msg03006.html but after upgrade my gcc-4.0 to latest version, still the bug aren't catched. so what do i do? gcc -Wall -DLOCALEDIR=\"/usr/share/locale\" -g -O2 -o killall killall.o signals.o if gcc -DHAVE_CONFIG_H -I. -I. -I.. -Wall -DLOCALEDIR=\"/usr/share/locale\" -g -O2 -MT pstree.o -MD -MP -MF ".deps/pstree.Tpo" -c -o pstree.o pstree.c; \ then mv -f ".deps/pstree.Tpo" ".deps/pstree.Po"; else rm -f ".deps/pstree.Tpo"; exit 1; fi pstree.c: In function 'dump_tree': pstree.c:539: internal compiler error: in cgraph_mark_reachable_node, at cgraph.c:477 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. make[3]: *** [pstree.o] Error 1 make[3]: Leaving directory `/sources/psmisc-21.6/src' make[2]: *** [all] Error 2 make[2]: Leaving directory `/sources/psmisc-21.6/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/sources/psmisc-21.6' make: *** [all] Error 2 root:/sources/psmisc-21.6# and, Here is my gcc version. root:/sources/psmisc-21.6# gcc -v Using built-in specs. Target: i686-pc-linux-gnu Configured with: ../gcc-4.0-20050326/configure --prefix=/usr --libexecdir=/usr/lib --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-languages=c,c++ Thread model: posix gcc version 4.0.0 20050326 (prerelease) root:/sources/psmisc-21.6#