Anyone tried gcc 4.2.0?

Message

zxy · Post by **zxy** » Wed Apr 12, 2006 4:57 am

Anyone tried gcc 4.2.0? What are the experiences? Especially on amd64?

zxy · Post by **zxy** » Wed Apr 12, 2006 5:08 am

I unmasked it with kuroo, and tooday I found gcc 4.2.0_alpha20060408 is available.

matrix101 · Post by **matrix101** » Wed Apr 12, 2006 12:03 pm

Gcc 4.1.0 broke my amd64 system, so I can guess what Gcc 4.2.0 will do...

Belliash · Post by **Belliash** » Wed Apr 12, 2006 12:17 pm

I have AMD64 system (all packages compiled using GCC 4.1.0) => all works fine

taylorpendley · Post by **taylorpendley** » Wed Apr 12, 2006 12:26 pm

i have gcc-4.2.0.20060408 and it works great.......i havent come across a package i couldnt compile......but i dont really use too many off the wall programs.
emerge -e world and emerge -s system never have any problems....im going to keep using 4.2.0

oh and buy the way...i amd x86_64. i compile with:

-O2 -march=athlon64 -pipe -fomit-frame-pointer -fweb -frename-registers -funswitch-loops -fgcse-after-reload

...basically it is -O3 but without the -finline-functions which makes code bloated alot of the time.

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 12:32 pm

taylorpendley wrote:i have gcc-4.2.0.20060408 and it works great
emerge -e world and emerge -s system never have any problems

Would'nt revdep-rebuild be enough to update your system?

lnxz · Post by **lnxz** » Wed Apr 12, 2006 1:14 pm

Revdep-rebuild only attempts to find broken library dependencies, emerge -e world ensures a consistent system.

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 3:24 pm

Yes, I know. But I will be upgrading from gcc-4.1.0 (the system was boostrapped with this version). Do you think I still need to rebuild my complete world?

lnxz · Post by **lnxz** » Wed Apr 12, 2006 3:42 pm

As far as I know you don't *need* to rebuild anything. I'm no expert, though.

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 3:53 pm

Thanks, I was planning on going on vacation after executing that command. Even though revdep-rebuild did not want to rebuild anything, prelink did get upset with some bmpx & gcc links. I guess I'll rebuild all that's related & try to prelink again.

zxy · Post by **zxy** » Wed Apr 12, 2006 4:28 pm

Does anybody know what is new in this version, compared to 4.1.0?

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 5:11 pm

Well, the changelog says:

# ChangeLog for sys-devel/gcc
# Copyright 1999-2006 Gentoo Foundation; Distributed under the GPL v2
# $Header: /var/www/www.gentoo.org/raw_cvs/gentoo-x86/sys-d ... hangeLog,v 1.521 2006/04/12 13:15:12 kloeri Exp $

12 Apr 2006; Bryan Østergaard <kloeri@gentoo.org gcc-3.4.6.ebuild:
~alpha 3.4.6 - solves a ld segfault in binutils when emerging gmp.

*gcc-4.2.0_alpha20060408 (11 Apr 2006)

11 Apr 2006; Mark Loeser <halcy0n@gentoo.org>
+gcc-4.2.0_alpha20060408.ebuild:
Initial gcc-4.2 snapshot; only report bugs if you have patches. These
snapshots are for testing purposes and are added as a convenience to
those that want to test as well

Even the gcc homepage says nothing about v. 4.2.0. Possibly it is just a bug-fix update?

zxy · Post by **zxy** » Wed Apr 12, 2006 5:54 pm

I still don't know wether should I stay or should I go with new version. Emerging world takes a few days and you have to be by the computer all the time, if something doesn't compile.

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 5:58 pm

Just hang on for a bit, I have emailed Mark. Give him some time to reply. (I told him about this thread)

Post by **Halcy0n** » Wed Apr 12, 2006 6:13 pm

http://gcc.gnu.org/wiki/GCC%204.2%20Projects

At this point, you really shouldn't use it unless you feel like dealing with breakage. The major changes for the new branch seem to mostly be new and better optimizations.

Tiger683 · Post by **Tiger683** » Wed Apr 12, 2006 7:41 pm

Halcy0n wrote:The major changes for the new branch seem to mostly be new and better optimizations.

Ugh!

Can't resist all the rice goodness

GrimSage · Post by **GrimSage** » Wed Apr 12, 2006 9:16 pm

is there a guide we can follow to upgrade from 3.4.6 to this? Could we pretty much just follow the ones to upgrade to 4.1?

Tiger683 · Post by **Tiger683** » Wed Apr 12, 2006 10:03 pm

GrimSage wrote:is there a guide we can follow to upgrade from 3.4.6 to this? Could we pretty much just follow the ones to upgrade to 4.1?

I wouldn't upgrade your main system to this if i were you.

shrtckt · Post by **shrtckt** » Wed Apr 12, 2006 11:44 pm

I will second that - I have got a LOT of problems. *** Switching back to 4.1.0 & having to rebuild a lot of code. Take Marks advice!

Post by **Halcy0n** » Thu Apr 13, 2006 1:46 am

I have one of my systems running this as my main compiler, but that is only because I don't care if the install gets trashed and I can quickly restore it. Play with it in a chroot, play with it on a spare system, but don't come crying to me if it explodes in your face

shrtckt · Post by **shrtckt** » Fri Apr 14, 2006 6:43 pm

Well, I'm real hard-headed & I bootstrapped this box w/gcc-4.2.0 - It works 100% bug free.

scott@node0 ~ $ uname -a
Linux node0 2.6.16-beyond2 #1 SMP PREEMPT Thu Apr 13 21:16:16 EDT 2006 i686 AMD Athlon(tm) Processor GNU/Linux

scott@node0 ~ $ gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: /var/tmp/portage/gcc-4.2.0_alpha20060408/work/gcc-4.2-20060408/configure --prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/4.2.0-alpha20060408 --includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.2.0-alpha20060408/include --datadir=/usr/share/gcc-data/i686-pc-linux-gnu/4.2.0-alpha20060408 --mandir=/usr/share/gcc-data/i686-pc-linux-gnu/4.2.0-alpha20060408/man --infodir=/usr/share/gcc-data/i686-pc-linux-gnu/4.2.0-alpha20060408/info --with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.2.0-alpha20060408/include/g++-v4 --host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-altivec --enable-nls --without-included-gettext --with-system-zlib --disable-checking --disable-werror --disable-libunwind-exceptions --disable-multilib --disable-libmudflap --disable-libssp --disable-libgcj --enable-languages=c,c++,objc,obj-c++,fortran --enable-shared --enable-threads=posix --enable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.2.0-alpha20060408 (experimental) (Gentoo 4.2.0_alpha20060408)

scott@node0 ~ $ emerge --info
Portage 2.1_pre7-r5 (default-linux/x86/2006.0, gcc-4.2.0-alpha20060408, glibc-2.4-r1, 2.6.16-beyond2 i686)
=================================================================
System uname: 2.6.16-beyond2 i686 AMD Athlon(tm) Processor
Gentoo Base System version 1.12.0_pre17
ccache version 2.4 [enabled]
dev-lang/python: 2.4.2-r1
sys-apps/sandbox: 1.2.17
sys-devel/autoconf: 2.13, 2.59-r7
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: 2.16.1-r2
sys-devel/libtool: 1.5.22
virtual/os-headers: 2.6.11-r3
ACCEPT_KEYWORDS="x86 ~x86"
AUTOCLEAN="yes"
CBUILD="i686-pc-linux-gnu"
CFLAGS="-march=athlon-xp -O3 -fomit-frame-pointer -pipe"
CHOST="i686-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/3/share/config /usr/lib/mozilla/defaults/pref /usr/share/X11/xkb /usr/share/config /var/qmail/control"
CONFIG_PROTECT_MASK="/etc/eselect/compiler /etc/gconf /etc/revdep-rebuild /etc/splash /etc/terminfo /etc/env.d"
CXXFLAGS="-march=athlon-xp -O3 -fomit-frame-pointer -pipe"
DISTDIR="/portage/distfiles"
FEATURES="autoconfig ccache distlocks fixpackages metadata-transfer sandbox sfperms strict"
GENTOO_MIRRORS="http://www.gtlib.gatech.edu/pub/gentoo http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/dis ... ons/gentoo"
MAKEOPTS="-j2"
PKGDIR="/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/portage"
PORTDIR_OVERLAY="/usr/portage"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="x86 X alsa apache2 apm arts asf avi berkdb bitmap-fonts browserplugin bzip2 cli crypt ctype cups curl dba dri eds emacs emboss encode esd expat fastbuild foomaticdb force-cgi-redirect fortran ftp gd gdbm gif gimp gimpprint gmp gnutls gpm gstreamer gtk gtk2 imagemagick imlib ipv6 isdnlog java jpeg jpeg2k libg++ libwww logrotate mad md5sum memlimit mikmod motif mozilla moznoirc moznomail mp3 mpeg ncurses nls nptl nptlonly nsplugin numeric nvidia objc objc++ offensive ogg opengl oss pam pcre pdflib perl pic png posix ppds pppd python quicktime readline real rtc sdl session simplexml soap sockets spell spl ssl tcpd tokenizer toolbar truetype truetype-fonts type1-fonts udev usb vorbis win32codecs wmf xchat xemacs xine xml xml2 xmms xsl xv zlib elibc_glibc input_devices_keyboard input_devices_mouse kernel_linux userland_GNU video_cards_nvidia video_cards_via video_cards_vga"
Unset: ASFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS

shrtckt · Post by **shrtckt** » Fri Apr 14, 2006 7:48 pm

You can do better that that - can you???

DarkMind · Post by **DarkMind** » Fri Apr 14, 2006 8:00 pm

i have a system compiled with gcc 4.1 is necesary rebuild all the packages to upgrade to gcc 4.2?

Non_E · Post by **Non_E** » Sat Apr 15, 2006 8:30 am

DarkMind wrote:i have a system compiled with gcc 4.1 is necesary rebuild all the packages to upgrade to gcc 4.2?

AFAIK gcc 4.2 should be binary compatible with 4.1

DarkMind · Post by **DarkMind** » Sat Apr 15, 2006 5:43 pm

glibc-2.4-r1 not compile

Anyone tried gcc 4.2.0?

Anyone tried gcc 4.2.0?

[\edit]

Gcc 4.2.0

Compatibility