Tested sys-kernel/gentoo-sources-2.6.24 on sparc.
Compiles fine, the warnings I get are harmless:
drivers/macintosh/Kconfig:121:warning: 'select' used by config symbol
'PMAC_APM_EMU' refers to undefined symbol 'APM_EMULATION'
mm/sparse-vmemmap.c: In function 'vmemmap_verify':
mm/sparse-vmemmap.c:64: warning: unused variable 'pfn'
net/bluetooth/hci_sysfs.c: In function 'del_conn':
net/bluetooth/hci_sysfs.c:335: warning: suggest parentheses around assignment
used as truth value
include/asm/parport.h:22: warning: 'dma_spin_lock' defined but not used
drivers/video/aty/atyfb_base.c:2713: warning: 'aty_resume_chip' defined but not
used
WARNING: vmlinux.o(.text+0x3fbf4): Section mismatch: reference to
.init.text:sun4v_ktsb_register (between 'smp_callin' and
'smp_fill_in_sib_core_maps')
WARNING: vmlinux.o(.text+0x405ec): Section mismatch: reference to
.init.text:sun4v_register_mondo_queues (between 'after_lock_tlb' and
'hv_cpu_startup')
WARNING: vmlinux.o(.text+0x4082c): Section mismatch: reference to
.init.text:sun4v_register_mondo_queues (between 'hv_cpu_startup' and
'sys32_exit')
WARNING: vmlinux.o(.sun4v_2insn_patch+0x3d8): Section mismatch: reference to
.init.text:
(there's also a discussion about these sun4v related warnings on the
lkml(http://marc.info/?l=linux-kernel&m=119867199528788&w=2))
Everything that worked in 2.6.23 still works.
# emerge --info
Portage 2.1.3.19 (default-linux/sparc/sparc64/2007.0, gcc-4.1.2,
glibc-2.6.1-r0, 2.6.24-gentoo sparc64)
=================================================================
System uname: 2.6.24-gentoo sparc64 sun4u
Timestamp of tree: Sat, 26 Jan 2008 18:00:01 +0000
app-shells/bash: 3.2_p17-r1
dev-lang/python: 2.4.4-r6
dev-python/pycrypto: 2.0.1-r6
sys-apps/baselayout: 1.12.10-r5
sys-apps/sandbox: 1.2.18.1-r2
sys-devel/autoconf: 2.13, 2.61-r1
sys-devel/automake: 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10
sys-devel/binutils: 2.18-r1
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool: 1.5.24
virtual/os-headers: 2.6.23-r3
ACCEPT_KEYWORDS="sparc"
CBUILD="sparc-unknown-linux-gnu"
CFLAGS="-mcpu=ultrasparc3 -mtune=ultrasparc3 -mvis -Wa,-Av8plusa -O2 -pipe
-frename-registers"
CHOST="sparc-unknown-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/X11/xkb"
CONFIG_PROTECT_MASK="/etc/env.d /etc/fonts/fonts.conf /etc/gconf
/etc/revdep-rebuild /etc/terminfo /etc/udev/rules.d"
CPPFLAGS="-mcpu=ultrasparc3 -mtune=ultrasparc3 -mvis -Wa,-Av8plusa -O2 -pipe
-frename-registers"
CXXFLAGS="-mcpu=ultrasparc3 -mtune=ultrasparc3 -mvis -Wa,-Av8plusa -O2 -pipe
-frename-registers"
DISTDIR="/tmp/distfiles"
FEATURES="collision-protect distlocks metadata-transfer parallel-fetch sanxbox
strict test userfetch userpriv usersandbox"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
LANG="de_DE.UTF-8"
LDFLAGS="-Wl,-O1"
LINGUAS="en de"
MAKEOPTS="-j3"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --delete-after --stats --timeout=180
--exclude=/distfiles --exclude=/local --exclude=/packages
--filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/portage/local/layman/sunrise"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="64bit 7zip X a52 aac aalib alsa artworkextra audacious avahi blender-game
bluetooth bzip2 caps cups custom-cflags cvs dbus dga divx dts dv dvd dvdread
encode fat ffmpeg flac ftp fuse gd gif gimp gmedia gnome gnome-print
gnomecanvas gpm grammar gtk hal hpn ieee1394 ithreads javascript jpeg jpeg2k
lzo mad midi mjpeg mp2 mp3 mpeg mpeg2 mplayer musepack nautilus ncurses network
networking nls nptl nptlonly nsplugin offensive ogg openal opengl opera pam png
pnm quicktime realmedia regex ruby samba sdl slang smp sms sound soundex sparc
speex spell sqlite3 ssl subversion svg symlink test theora threads tiff
truetype tta unicode usb userlocales utils vcd vidix vim vim-syntax vim-with-x
vorbis wma wmf wmp x264 xanim xcb xfce xine xinerama xorg xulrunner xv xvid
zlib" ALSA_PCM_PLUGINS="adpcm alaw copy dshare dsnoop extplug file hooks ladspa
lfloat linear meter mulaw multi null rate route share shm" ELIBC="glibc"
INPUT_DEVICES="keyboard mouse" KERNEL="linux" LINGUAS="en de" USERLAND="GNU"
VIDEO_CARDS="mach64"
Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS,
PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
