Bug 72456 – kernel doesn't build properly with new binutils (2.15.90.0.1.1-r3)

• Status: RESOLVED WONTFIX
• Product: Gentoo Linux

[Description shing 2004-11-25 06:06:25 UTC]

After emerging the new binutils-2.15.90.0.1.1-r3, I tried to build a new kernel. Kernel compiled fine, but after rebooting, the kernel gets stuck in a reboot-loop just after the "uncompressing kernel..." message.

I experimented with CFLAGS a bit and discovered that using the default CFLAGS works without trouble. This is on a thinkpad x40 so I had customized CFLAGS to contain "-march=pentium3 -msse2". Removing those flags seems to solve the problem. But this shouldn't happen, right?

Reproducible: Always
Steps to Reproduce:
1. emerge binutils-2.15.90.0.1.1-r3 with CFLAGS containing "-march=pentium3 -msse2" on a centrino laptop
2. build kernel
3. reboot with new kernel

Actual Results:  
Kernel gets stuck in a reboot loop.

Expected Results:  
Boot properly!

[Comment 1 SpanKY 2004-11-26 19:48:58 UTC]

are you using a pentium m processor ?
you also neglected to provide `emerge info` like the bug report page says to

[Comment 2 shing 2004-11-27 02:59:56 UTC]

Sorry, I thought it was clear as I mentioned that this is on a thinkpad x40 which is a pentium-m centrino laptop.

emerge info:
Gentoo Base System version 1.6.6
Portage 2.0.51-r3 (default-linux/x86/2004.3, gcc-3.3.4, glibc-2.3.4.20040808-r1, 2.6.9-gentoo-r6 i686)
=================================================================
System uname: 2.6.9-gentoo-r6 i686 Intel(R) Pentium(R) M processor 1300MHz
Autoconf: sys-devel/autoconf-2.59-r5
Automake: sys-devel/automake-1.8.5-r1
Binutils: sys-devel/binutils-2.15.90.0.1.1-r3
Headers:  sys-kernel/linux-headers-2.4.21-r1
Libtools: sys-devel/libtool-1.5.2-r5
ACCEPT_KEYWORDS="x86"
AUTOCLEAN="yes"
CFLAGS="-O2 -march=pentium3 -pipe -fomit-frame-pointer -msse2"
CHOST="i686-pc-linux-gnu"
COMPILER=""
CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/gconf /etc/terminfo /etc/env.d"
CXXFLAGS="-O2 -march=pentium3 -pipe -fomit-frame-pointer -msse2"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoaddcvs autoconfig ccache distlocks sandbox sfperms"
GENTOO_MIRRORS="ftp://ftp.gtlib.cc.gatech.edu/pub/gentoo ftp://csociety-ftp.ecn.purdue.edu/pub/gentoo/ ftp://ftp.ussg.iu.edu/pub/linux/gentoo"
MAKEOPTS="-j2"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="X alsa apm arts avi berkdb bitmap-fonts crypt cups encode f77 foomaticdb fortran gdbm gif gpm gtk gtk2 imlib java jpeg libg++ libwww mad mikmod mmx motif mpeg ncurses oggvorbis opengl oss pam pdflib perl png python qt quicktime readline spell sse sse2 ssl svga tcpd truetype x86 xml2 xosd xv zlib"

[Comment 3 Stefan Schweizer (RETIRED) 2004-11-27 03:04:03 UTC]

do we need a filter-flags for binutils here?

[Comment 4 SpanKY 2004-11-29 19:15:51 UTC]

a bit more info ... changing resolution ...

[Comment 5 SpanKY 2004-11-29 19:16:47 UTC]

i dont really know anything about thinkpad's which is why i wanted to double check the cpu

if you do CFLAGS="-march=pentium3" and rebuild binutils / kernel, does the resulting kernel work ?

[Comment 6 shing 2004-11-30 01:24:37 UTC]

Just tried recompiling binutils without the "-msse2" flag and built the kernel using that. Seems to work fine.

[Comment 7 SpanKY 2004-11-30 06:49:24 UTC]

the pentium m processor isnt properly supported with gcc <= 3.3.4 for sure

i'd be willing to bet that 3.3.5 is the same way (but dont quote me :P)

stop trying to force sse2 with pentium m and gcc-3.3.x ... upgrade to
gcc-3.4.x where the march flag has pentium m as an option