Bugzilla Bug 140919

I've been having some problems with bzflag lately, that is that if I shoot
someone I won't hit them, and the other persons doesn't see my shots. After
googling around a bit I found this upstream bug posted over a year ago, but
nothing has happened after that, so the devs must have missed it:
http://sourceforge.net/tracker/index.php?func=detail&aid=1191085&group_id=3248&atid=103248

The person who reported that says that it will get this weird behavior with gcc
4.0 and -O2 or -fstrict-aliasing. I have found that it also happens with -O3.
And sure enough, downgrading the cflags to -O1 fixed the problem.

If the bug is caused by >=-O2 implying -fstrict-aliasing then the most correct
workaround would be to add -fno-strict-aliasing, otherwise I guess you'll have
to filter out -O2 -O3 and -Os. I have posted a comment in the upstream bug, and
hopefully it'll get some attention from the upstream developers so they can
provide a proper fix

My emerge info:
Portage 2.1.1_pre3-r1 (default-linux/amd64/2006.0, gcc-4.1.1/amd64-vanilla,
glibc-2.4-r3, 2.6.17-gentoo-r2-tpc1 x86_64)
=================================================================
System uname: 2.6.17-gentoo-r2-tpc1 x86_64 AMD Athlon(tm) 64 X2 Dual Core
Processor 4400+
Gentoo Base System version 1.12.1
ccache version 2.4 [enabled]
app-admin/eselect-compiler: 2.0.0_rc2-r1
dev-lang/python:     2.4.3-r1
dev-python/pycrypto: 2.0.1-r5
dev-util/ccache:     2.4-r2
dev-util/confcache:  [Not Present]
sys-apps/sandbox:    1.2.18.1
sys-devel/autoconf:  2.13, 2.60
sys-devel/automake:  1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2
sys-devel/binutils:  2.17
sys-devel/gcc-config: 2.0.0_rc1
sys-devel/libtool:   1.5.22
virtual/os-headers:  2.6.16
ACCEPT_KEYWORDS="amd64 ~amd64"
AUTOCLEAN="yes"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=athlon64 -mtune=athlon64 -msse3 -O3 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/X11/xkb"
CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/eselect/compiler
/etc/gconf /etc/java-config/vms/ /etc/revdep-rebuild /etc/terminfo"
CXXFLAGS="-march=athlon64 -mtune=athlon64 -msse3 -O3 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="autoconfig ccache confcache distlocks fixpackages metadata-transfer
parallel-fetch sandbox sfperms strict"
GENTOO_MIRRORS="http://ds.thn.htu.se/linux/gentoo
http://ftp.du.se/pub/os/gentoo http://distfiles.gentoo.org
http://www.ibiblio.org/pub/Linux/distributions/gentoo"
LANG="sv_SE.ISO-8859-1"
LC_ALL="sv_SE.ISO-8859-1"
LINGUAS="sv"
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='/pac
kages'"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/usr/local/portage"
SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage"
USE="amd64 GAPING_SECURITY_HOLE X a52 aac aalib acpi alsa amr ao apache apache2
ares asf authfile avi bash-completion bcmath berkdb bluetooth browserplugin
bzip2 cairo cddb cdparanoia cli crypt cups curl 
curlwrappers custom-cflags dbus dga dlloader dmi dri dv dvd dvdread encode faad
fam ffmpeg flac fontconfig foomaticdb fortran ftp gd gdbm gif gimp glibc-omitfp
glitz gnutls gphoto2 gs gtk gtk2 hal hub idn
 imagemagick inkjar iontruetype ithreads java javascript jce jpeg kqemu latin1
lcms libcaca libg++ live logitech-mouse logrotate lua mad mikmod mmap mng
modplug mp3 mp4 mpeg musepack musicbrainz mysql ncu
rses nls noflagstrip nptl nptlonly nsplugin nvidia offensive ogg opengl
opensslcrypt pam panel-plugin parse-clocks pcre pda pdf pdflib perl
pg-intdatetime php png pwdb python quicktime rdesktop readline r
ewrite rtc ruby sasl scanner sdl session shaper simplexml slang smp sockets
speex spell sql ssl subversion svg symlink syslog theora threads thumbnail
thunar-vfs tiff timidity truetype truetype-fonts type
1-fonts udev usb vcd vchroot vim-pager vim-with-x vorbis vroot wxwindows x264
xanim xcomposite xml xml2 xorg xpm xv xvid xvmc zip zlib elibc_glibc
input_devices_keyboard input_devices_mouse kernel_linux l
inguas_sv userland_GNU video_cards_nv video_cards_nvidia"
Unset:  CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS,
PORTAGE_RSYNC_EXTRA_OPTS

sorry for the duplicate, the bugs.gentoo.org website frooze for over a minute,
so I pressed the commit button again.

*** This bug has been marked as a duplicate of 140918 ***