GCC 4.5 testing

Message

rhill · Post by **rhill** » Sat Dec 12, 2009 9:25 pm

GCC 4.5 went into prerelease mode last weekish. I've created the tracker bug for 4.5 porting and have started build testing. As always, anyone filing good bug reports with patches included are welcome to help.

https://bugs.gentoo.org/show_bug.cgi?id=296658

At the moment I'm concerned about things failing with a standard configuration. Ie. if you want to test, please have your system built with safe CFLAGS, use the standard linker (not gold), and leave graphite and LTO off. Also, you need to be running ~arch. It might seem obvious but we always get people that try to run an unreleased compiler on a stable system.

Switching between compiler versions can break C++ programs that use symbol versioning. When switching to an older release from a newer one, if you encounter runtime errors like "libstdc++.so.6: version `GLIBCXX_3.4.9' not found", rebuild the package with the current compiler.

GCC snapshots and svn ebuilds are in the toolchain overlay. The gcc-porting overlay will be used again as a repository for patches not yet applied to the tree.

Bug reports must include patches, and all patches must go upstream.

me22 · Post by **me22** » Tue Dec 22, 2009 12:25 am

dirtyepic wrote:Also, you need to be running ~arch. It might seem obvious but we always get people that try to run an unreleased compiler on a stable system.

To check, that warning's for using it as a system compiler, not for using it outside of portage for personal dev stuff, right?

(I thought I was fine, as I've been using 4.4.2 just fine in my mostly-stable install, but I got spooked.)

rhill · Post by **rhill** » Tue Dec 22, 2009 6:41 am

sure, that's fine. we just get always get a number of bug reports from people who use svn builds of toolchain packages on their stable systems and then complain when emerge @world fails. if it's not selected by gcc-config then you don't have to worry.

me22 · Post by **me22** » Tue Dec 22, 2009 7:00 am

dirtyepic wrote:sure, that's fine.

Thanks for confirming.

* Goes off to play with r-value reference, lambdas, and other fun -std=gnu++0x stuff in GCC 4.5-svn

justinkb · Post by **justinkb** » Fri Dec 25, 2009 8:32 pm

Running into this... I guess it's only an annoyance, but still...

Code: Select all

/sbin/ldconfig: /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.0-pre9999/libstdc++.so.6.0.14-gdb.py is not an ELF file - it has the wrong magic bytes at the start.

What would be a good path to put this .py file? and would it require editing the toolchain eclass to fix this in the ebuild?

SamuliSuominen · Post by **SamuliSuominen** » Fri Dec 25, 2009 9:33 pm

justinkb wrote:Running into this... I guess it's only an annoyance, but still...
Code: Select all
/sbin/ldconfig: /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.0-pre9999/libstdc++.so.6.0.14-gdb.py is not an ELF file - it has the wrong magic bytes at the start.
What would be a good path to put this .py file? and would it require editing the toolchain eclass to fix this in the ebuild?

FYI. I hit this same problem too.

few · Post by **few** » Wed Jan 13, 2010 7:05 pm

Would it be possible to get a lto useflag for the snapshots? Current gcc-4.5.0_alpha20100107 snapshot fails to compile.
EDIT: 4.5.0_pre999 fails too...

* updating multilib directories to be: ../lib64 ../lib32
cp: cannot stat `/var/tmp/portage/sys-devel/gcc-4.5.0_pre9999/distdir/ecj-4.3.jar': No such file or directory
* ERROR: sys-devel/gcc-4.5.0_pre9999 failed:

Comparing stages 2 and 3
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
gcc/builtins.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/var/tmp/portage/sys-devel/gcc-4.5.0_alpha20100107/work/build'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/var/tmp/portage/sys-devel/gcc-4.5.0_alpha20100107/work/build'
make: *** [bootstrap-lean] Error 2
* ERROR: sys-devel/gcc-4.5.0_alpha20100107 failed:
* emake failed with bootstrap-lean
*
* Call stack:
* ebuild.sh, line 48: Called src_compile
* environment, line 5040: Called toolchain_src_compile
* environment, line 5600: Called gcc_src_compile
* environment, line 3188: Called gcc_do_make
* environment, line 2978: Called die
* The specific snippet of code:
* emake LDFLAGS="${LDFLAGS}" STAGE1_CFLAGS="${STAGE1_CFLAGS}" LIBPATH="${LIBPATH}" BOOT_CFLAGS="${BOOT_CFLAGS}" ${GCC_MAKE_TARGET} || die "emake failed with ${GCC_MAKE_TARGET}";
*

rhill · Post by **rhill** » Sat Jan 30, 2010 2:16 am

LTO will be enabled if libelf is detected during the build. If you have elfutils installed it should work out of the box.

i know the ldconfig messages are annoying. just delete them if they bother you, they're just pretty-printers for gdb-7.0. i need to sit down and figure out where else they can be stashed that's outside of the library path.

if anyone's had trouble building boost the last week or two, it was fixed today.

few · Post by **few** » Wed Feb 03, 2010 7:54 pm

dirtyepic wrote:LTO will be enabled if libelf is detected during the build. If you have elfutils installed it should work out of the box.

gcc-4.5.0_pre9999 depends on elfutils with USE="lto" (which is wrong). And there is an --enable-lto, but I did not test if this is really needed.

rhill · Post by **rhill** » Thu Feb 04, 2010 3:01 am

why is it wrong?

lto is automatically enabled if libelf is found. i guess i could add a USE flag to make it explicit though.

cruzki123 · Post by **cruzki123** » Thu Feb 04, 2010 11:22 am

I'm having this error whis the two last snapshots:

Code: Select all

make[4]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/x86_64-pc-linux-gnu/libgcc'                                   
make[3]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/x86_64-pc-linux-gnu/libgcc'                                   
make[2]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'                                                              
make "DESTDIR=" "RPATH_ENVVAR=LD_LIBRARY_PATH" "TARGET_SUBDIR=x86_64-pc-linux-gnu" "bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.5.0-alpha20100121" "datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.5.0-alpha20100121" "exec_prefix=/usr" "includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.5.0-alpha20100121/include" "datarootdir=/usr/share" "docdir=/usr/share/doc/" "infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.5.0-alpha20100121/info" "pdfdir=/usr/share/doc/" "htmldir=/usr/share/doc/" "libdir=/usr/lib" "libexecdir=/usr/libexec" "lispdir=" "localstatedir=/usr/var" "mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.5.0-alpha20100121/man" "oldincludedir=/usr/include" "prefix=/usr" "sbindir=/usr/sbin" "sharedstatedir=/usr/com" "sysconfdir=/usr/etc" "tooldir=/usr/x86_64-pc-linux-gnu" "build_tooldir=/usr/x86_64-pc-linux-gnu" "target_alias=x86_64-pc-linux-gnu" "AWK=gawk" "BISON=bison" "CC_FOR_BUILD=x86_64-pc-linux-gnu-gcc" "CFLAGS_FOR_BUILD=-march=core2 -O2 -pipe" "CXX_FOR_BUILD=x86_64-pc-linux-gnu-g++" "EXPECT=expect" "FLEX=flex" "INSTALL=/usr/bin/install -c" "INSTALL_DATA=/usr/bin/install -c -m 644" "INSTALL_PROGRAM=/usr/bin/install -c" "INSTALL_SCRIPT=/usr/bin/install -c" "LDFLAGS_FOR_BUILD=-Wl,-O1 -Wl,--as-needed -Wl,-znow -Wl,--hash-style=gnu -Wl,--sort-common" "LEX=flex" "M4=m4" "MAKE=make" "RUNTEST=runtest" "RUNTESTFLAGS=" "SED=/bin/sed" "SHELL=/bin/sh" "YACC=bison -y" "`echo 'ADAFLAGS=' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "ADA_CFLAGS=" "AR_FLAGS=rc" "`echo 'BOOT_ADAFLAGS=-gnatpg -gnata' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "BOOT_CFLAGS=-march=core2 -O2 -pipe" "BOOT_LDFLAGS=" "CFLAGS=-march=core2 -O2 -pipe" "CXXFLAGS=-march=core2 -O2 -pipe" "LDFLAGS=-Wl,-O1 -Wl,--as-needed -Wl,-znow -Wl,--hash-style=gnu -Wl,--sort-common" "LIBCFLAGS=-march=core2 -O2 -pipe" "LIBCXXFLAGS=-march=core2 -O2 -pipe -fno-implicit-templates" "STAGE1_CHECKING=--enable-checking=yes,types" "STAGE1_LANGUAGES=c" "GNATBIND=no" "GNATMAKE=no" "AR_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/ar" "AS_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/as" "CC_FOR_TARGET=/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/./gcc/xgcc -B/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/./gcc/" "CFLAGS_FOR_TARGET=-g -march=core2 -O2 -pipe" "CPPFLAGS_FOR_TARGET=" "CXX_FOR_TARGET=/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/./gcc/g++ -B/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/./gcc/ -nostdinc++  -L/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src -L/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build/x86_64-pc-linux-gnu/libstdc++-v3/src/.libs" "CXXFLAGS_FOR_TARGET=-march=core2 -O2 -pipe -D_GNU_SOURCE" "DLLTOOL_FOR_TARGET=dlltool" "FLAGS_FOR_TARGET=-B/usr/x86_64-pc-linux-gnu/bin/ -B/usr/x86_64-pc-linux-gnu/lib/ -isystem /usr/x86_64-pc-linux-gnu/include -isystem /usr/x86_64-pc-linux-gnu/sys-include" "GCJ_FOR_TARGET=" "GFORTRAN_FOR_TARGET=" "LD_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/ld" "LIPO_FOR_TARGET=lipo" "LDFLAGS_FOR_TARGET=" "LIBCFLAGS_FOR_TARGET=-g -march=core2 -O2 -pipe" "LIBCXXFLAGS_FOR_TARGET=-march=core2 -O2 -pipe -D_GNU_SOURCE -fno-implicit-templates" "NM_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/nm" "OBJDUMP_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/objdump" "RANLIB_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/ranlib" "STRIP_FOR_TARGET=/usr/x86_64-pc-linux-gnu/bin/strip" "WINDRES_FOR_TARGET=windres" "WINDMC_FOR_TARGET=windmc" "BUILD_CONFIG=bootstrap-debug" "`echo 'LANGUAGES=' | sed -e s'/[^=][^=]*=$/XFOO=/'`" "LEAN=:" "STAGE1_CFLAGS=-O" "STAGE1_CXXFLAGS=-march=core2 -O2 -pipe" "STAGE1_TFLAGS=" "STAGE2_CFLAGS=-march=core2 -O2 -pipe -gtoggle" "STAGE2_CXXFLAGS=-march=core2 -O2 -pipe" "STAGE2_TFLAGS=" "STAGE3_CFLAGS=-march=core2 -O2 -pipe" "STAGE3_CXXFLAGS=-march=core2 -O2 -pipe" "STAGE3_TFLAGS=" "STAGE4_CFLAGS=-march=core2 -O2 -pipe" "STAGE4_CXXFLAGS=-march=core2 -O2 -pipe" "STAGE4_TFLAGS=" "STAGEprofile_CFLAGS=-march=core2 -O2 -pipe -gtoggle -fprofile-generate" "STAGEprofile_CXXFLAGS=-march=core2 -O2 -pipe" "STAGEprofile_TFLAGS=" "STAGEfeedback_CFLAGS=-march=core2 -O2 -pipe -fprofile-use" "STAGEfeedback_CXXFLAGS=-march=core2 -O2 -pipe" "STAGEfeedback_TFLAGS=" "TFLAGS=" "CONFIG_SHELL=/bin/sh" "MAKEINFO=makeinfo --split-size=5000000 --split-size=5000000"  compare                                                                                
make[2]: Entering directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'                                                             
make[3]: Entering directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'                                                             
rm -f stage_current                                                                                                                                          
make[3]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'                                                              
Comparing stages 2 and 3                                                                                                                                     
warning: gcc/cc1-checksum.o differs                                                                                                                          
warning: gcc/cc1plus-checksum.o differs                                                                                                                      
Bootstrap comparison failure!                                                                                                                                
gcc/builtins.o differs                                                                                                                                       
make[2]: *** [compare] Error 1                                                                                                                               
make[2]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/home/portage/portage/sys-devel/gcc-4.5.0_alpha20100121/work/build'
make: *** [bootstrap-lean] Error 2

Any ideas?

rhill · Post by **rhill** » Sat Feb 06, 2010 4:52 am

it's an upstream issue. i think it's been fixed now, so wait until the next snapshot or try the svn ebuild.

cruzki123 · Post by **cruzki123** » Sat Feb 06, 2010 7:58 pm

OK thanks.

EDIT: the new snapshop compiles fine. Thanks

few · Post by **few** » Tue Feb 09, 2010 9:35 pm

dirtyepic wrote:why is it wrong?

lto is automatically enabled if libelf is found. i guess i could add a USE flag to make it explicit though.

My issue was that =dev-libs/elfutils-0.131-r2 isn't enough for lto. With 0.144, it works now . A use flag to have lto definitely enabled would be a good thing imo.

rhill · Post by **rhill** » Tue Feb 09, 2010 10:58 pm

ah, i was wondering what the min version might be. I'll update the depend next time i touch the snapshots.

cruzki123 · Post by **cruzki123** » Wed Feb 10, 2010 12:56 am

EDIT: Don't try to compile a kernel with gcc-4.5. Compile fine, but when udev it is trying to do it's magic you obtain a nice kernel panic.

I just found something tricky

if you unistall libelf, gcc doesn't work any more.
I have to gcc-config 4.4.3; emerge elfutils gcc and then try again.
I suppose that at least a use flag shoul be used but I think that elfutils should be in system profile with a very VERY fat warnig.

On the other hand the following packages did not compile in a world rebuild (700+ packages) with graphite enable:
(lto did not work, but with a program I develop works like a charm and it's about 10% faster.)

app-office:
total 8
drwxrwxr-x 7 portage portage 4096 feb 10 01:12 kword-2.1.0
drwxrwxr-x 4 portage portage 4096 feb 10 00:44 openoffice-3.1.1

dev-db:
total 4
drwxrwxr-x 4 portage portage 4096 feb 9 23:56 hsqldb-1.8.0.10

dev-java:
total 140
drwxrwxr-x 4 portage portage 4096 feb 9 22:09 ant-core-1.7.1-r4
drwxrwxr-x 4 portage portage 4096 feb 9 22:34 ant-nodeps-1.7.1
drwxrwxr-x 4 portage portage 4096 feb 9 23:44 bcel-5.2
drwxrwxr-x 4 portage portage 4096 feb 9 23:53 bsh-2.0_beta4-r3
drwxrwxr-x 4 portage portage 4096 feb 10 00:08 dom4j-1.6.1-r6
drwxrwxr-x 7 portage portage 4096 feb 10 00:37 icedtea-6.1.7
drwxrwxr-x 4 portage portage 4096 feb 9 23:45 icu4j-3.8.1-r1
drwxrwxr-x 4 portage portage 4096 feb 9 23:49 iso-relax-20050331-r2
drwxrwxr-x 4 portage portage 4096 feb 9 23:53 javacc-4.2
drwxrwxr-x 4 portage portage 4096 feb 9 23:45 javacup-0.11a_beta20060608
drwxrwxr-x 4 portage portage 4096 feb 10 00:09 jaxen-1.1.1
drwxrwxr-x 4 portage portage 4096 feb 10 00:09 jdom-1.0-r4
drwxrwxr-x 4 portage portage 4096 feb 10 00:10 jdom-jaxen-1.0-r1
drwxrwxr-x 4 portage portage 4096 feb 9 22:34 junit-3.8.2-r1
drwxrwxr-x 4 portage portage 4096 feb 9 22:17 libreadline-java-0.8.0-r2
drwxrwxr-x 4 portage portage 4096 feb 9 23:57 lucene-2.3.2
drwxrwxr-x 4 portage portage 4096 feb 9 22:24 lucene-analyzers-2.3.2
drwxrwxr-x 4 portage portage 4096 feb 10 00:08 msv-20050627-r2
drwxrwxr-x 4 portage portage 4096 feb 9 22:14 relaxng-datatype-1.0-r1
drwxrwxr-x 4 portage portage 4096 feb 9 22:24 rhino-1.5.5-r5
drwxrwxr-x 4 portage portage 4096 feb 10 00:10 rhino-1.6.5
drwxrwxr-x 4 portage portage 4096 feb 9 22:15 saxpath-1.0-r2
drwxrwxr-x 4 portage portage 4096 feb 9 22:46 servletapi-2.4-r5
drwxrwxr-x 4 portage portage 4096 feb 9 22:36 tomcat-servlet-api-4.1.36
drwxrwxr-x 4 portage portage 4096 feb 9 23:58 xalan-2.7.1
drwxrwxr-x 4 portage portage 4096 feb 9 23:51 xalan-serializer-2.7.1
drwxrwxr-x 4 portage portage 4096 feb 9 23:53 xerces-2.9.1
drwxrwxr-x 4 portage portage 4096 feb 9 23:50 xjavac-20041208-r5
drwxrwxr-x 4 portage portage 4096 feb 9 22:13 xml-commons-external-1.3.04
drwxrwxr-x 4 portage portage 4096 feb 9 22:17 xml-commons-resolver-1.2
drwxrwxr-x 4 portage portage 4096 feb 10 00:10 xml-xmlbeans-1.0.4_pre20041217
drwxrwxr-x 4 portage portage 4096 feb 9 23:58 xom-1.0-r7
drwxrwxr-x 4 portage portage 4096 feb 10 00:02 xpp2-2.1.10-r1
drwxrwxr-x 4 portage portage 4096 feb 9 23:46 xpp3-1.1.4c-r1
drwxrwxr-x 4 portage portage 4096 feb 9 23:57 xsdlib-20050627-r2

dev-lang:
total 4
drwxrwxr-x 7 portage portage 4096 feb 10 00:43 R-2.10.1

dev-libs:
total 8
drwxrwxr-x 7 portage portage 4096 feb 9 22:02 boost-1.41.0-r3
drwxrwxr-x 4 portage portage 4096 feb 9 22:10 soprano-2.3.73

dev-tex:
total 4
drwxrwxr-x 4 portage portage 4096 feb 10 01:03 tex4ht-20090611_p1038-r1

kde-misc:
total 4
drwxrwxr-x 7 portage portage 4096 feb 9 23:44 yawp-0.3.2

media-gfx:
total 4
drwxrwxr-x 7 portage portage 4096 feb 10 00:24 gimp-2.6.8

media-libs:
total 4
drwxrwxr-x 7 portage portage 4096 feb 9 20:54 mesa-7.7-r1

media-plugins:
total 8
drwxrwxr-x 7 portage portage 4096 feb 9 22:08 gst-plugins-ffmpeg-0.10.9
drwxrwxr-x 7 portage portage 4096 feb 9 22:05 gst-plugins-taglib-0.10.17

media-video:
total 8
drwxrwxr-x 7 portage portage 4096 feb 9 22:31 avidemux-2.5.2
drwxrwxr-x 7 portage portage 4096 feb 9 22:11 ffmpeg-0.5_p20373

net-libs:
total 4
drwxrwxr-x 4 portage portage 4096 feb 10 00:20 xulrunner-1.9.2-r1

sci-libs:
total 8
drwxrwxr-x 4 portage portage 4096 feb 9 20:11 blas-reference-20070226
drwxrwxr-x 4 portage portage 4096 feb 9 20:15 lapack-reference-3.2.1

sci-mathematics:
total 8
drwxrwxr-x 7 portage portage 4096 feb 10 01:02 octave-3.2.4
drwxrwxr-x 7 portage portage 4096 feb 10 00:44 rkward-0.5.2

sys-devel:
total 4
drwxrwxr-x 7 portage portage 4096 feb 9 20:24 gcc-4.5.0_alpha20100204

www-client:
total 4
drwxrwxr-x 4 portage portage 4096 feb 10 00:24 mozilla-firefox-3.6-r1

There are some of them that was related to gcc not being compiled with fortran, openmp and gcj. Some other hang in configure o link phase without any reason. I have to kill the prosses. I'm rebuilding gcc and then I will try again.

rtomek · Post by **rtomek** » Wed Feb 10, 2010 8:35 pm

well I just built kde 4.4 with the 4.5.0 snapshot from 2 days ago. It all worked!

rhill · Post by **rhill** » Fri Feb 12, 2010 5:37 am

few wrote:My issue was that =dev-libs/elfutils-0.131-r2 isn't enough for lto. With 0.144, it works now . A use flag to have lto definitely enabled would be a good thing imo.

Added.

ComaWhite · Post by **ComaWhite** » Sun Apr 04, 2010 9:53 am

GCC-4.5 finally hitting RC stage. I wonder if anyone gave up on testing GCC-4.5.0 ;P

rhill · Post by **rhill** » Mon Apr 05, 2010 1:01 am

i haven't had it break anything in months. it's been kinda anticlimactic.

cruzki123 · Post by **cruzki123** » Mon Apr 05, 2010 11:12 am

Last time I try it broke my system. But I use lto an agresive graphite flags :S

I will tryin a couple of days one more time. is rc1 in toolchain already?

rhill · Post by **rhill** » Mon Apr 05, 2010 11:30 pm

that would probably do it.

i'd hold off LTO til libtool gets proper support. hopefully graphite works better than it does in 4.4.

rc1 isn't released yet. they're in code freeze right now, they'll branch sometime soon and then do RC's.

rhill · Post by **rhill** » Sat Apr 10, 2010 9:39 pm

the 4.5 branch has been created and the live ebuild tracks it instead of trunk now. i'm not planning on adding ebuilds for the RCs - just use the live ones, they'll be close enough.

Etal · Post by **Etal** » Thu Apr 15, 2010 3:07 am

It's out!

http://gcc.gnu.org/ml/gcc/2010-04/msg00321.html
http://gcc.gnu.org/gcc-4.5/changes.html

Shining Arcanine · Post by **Shining Arcanine** » Thu Apr 15, 2010 1:28 pm

AM088 wrote:It's out!

http://gcc.gnu.org/ml/gcc/2010-04/msg00321.html
http://gcc.gnu.org/gcc-4.5/changes.html

When can we expect this to be in portage?

GCC 4.5 testing

GCC 4.5 testing

Re: GCC 4.5 testing