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Headrush
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PostPosted: Wed Dec 29, 2004 5:06 am    Post subject: Reply with quote

I noticed a substantial reduction in startup time for firefox using LDFLAGS="-Wl,-O1"

I tried LDFLAGS="-Wl,-O1,-Wl,--enable-new-dtags" and no programs compile. The error is
Code:
checking for C compiler default output... configure: error: C compiler cannot create executables

This is with gcc-3.4.3
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codergeek42
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PostPosted: Wed Dec 29, 2004 8:01 am    Post subject: Reply with quote

Ok. All seems to have gone well in my chrooted install. Now to install Grub 8)
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PostPosted: Wed Dec 29, 2004 8:47 am    Post subject: Reply with quote

I have been using these flags since the start of this thread and I have not any problems with my programs. :D
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growse
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PostPosted: Wed Dec 29, 2004 6:25 pm    Post subject: Reply with quote

Just to check, if i do an emerge -e world, that includes the system packages as well? i'm trying this on my server.
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PostPosted: Wed Dec 29, 2004 7:28 pm    Post subject: Reply with quote

growse wrote:
Just to check, if i do an emerge -e world, that includes the system packages as well? i'm trying this on my server.


yep. world encompasses every package on your computer.
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jrw6
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PostPosted: Sat Jan 01, 2005 10:07 pm    Post subject: Reply with quote

I added the following to my /etc/make.conf:
Code:
LDFLAGS="-Wl,-O1"

then I started "emerge -e world". I've got to the following error while compiling gnome-vfs, which I can't figure out or solve:
Code:
/bin/sh ../libtool --mode=compile i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I.. -pthread -DORBIT2=1 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/gconf/2 -I/usr/include/orbit-2.0 -I/usr/include/bonobo-activation-2.0 -I/usr/include/libbonobo-2.0 -I/usr/include/libxml2       -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include    -DORBIT2=1 -pthread -I/usr/include/libbonobo-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/orbit-2.0 -I/usr/include/bonobo-activation-2.0   -DXDG_PREFIX=_gnome_vfs_xdg -D_FILE_OFFSET_BITS=64 -D_BSD_SOURCE -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -DG_DISABLE_DEPRECATED -DDATADIR=\"/usr/share\" -DLIBDIR=\"/usr/lib\" -DPREFIX=\"/usr\" -DGNOMEVFS_LOCALEDIR=\"/usr/share/locale\" -DSYSCONFDIR=\"/etc\" -DG_LOG_DOMAIN=\"libgnomevfs\"     -O2 -march=athlon-xp -fomit-frame-pointer -c -o gnome-vfs-inet-connection.lo `test -f 'gnome-vfs-inet-connection.c' || echo './'`gnome-vfs-inet-connection.c
In file included from /usr/include/libbonobo-2.0/bonobo/bonobo-object.h:17,
                 from /usr/include/libbonobo-2.0/bonobo/bonobo-types.h:16,
                 from /usr/include/libbonobo-2.0/libbonobo.h:18,
                 from gnome-vfs-daemon-method.c:24:
/usr/include/libbonobo-2.0/bonobo/Bonobo.h:6334: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.

then a little later:
Code:
 i686-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I.. -pthread -DORBIT2=1 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/gconf/2 -I/usr/include/orbit-2.0 -I/usr/include/bonobo-activation-2.0 -I/usr/include/libbonobo-2.0 -I/usr/include/libxml2 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -DORBIT2=1 -pthread -I/usr/include/libbonobo-2.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/orbit-2.0 -I/usr/include/bonobo-activation-2.0 -DXDG_PREFIX=_gnome_vfs_xdg -D_FILE_OFFSET_BITS=64 -D_BSD_SOURCE -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -DG_DISABLE_DEPRECATED -DDATADIR=\"/usr/share\" -DLIBDIR=\"/usr/lib\" -DPREFIX=\"/usr\" -DGNOMEVFS_LOCALEDIR=\"/usr/share/locale\" -DSYSCONFDIR=\"/etc\" -DG_LOG_DOMAIN=\"libgnomevfs\" -O2 -march=athlon-xp -fomit-frame-pointer -c gnome-vfs-init.c -MT gnome-vfs-init.lo -MD -MP -MF .deps/gnome-vfs-init.TPlo  -fPIC -DPIC -o .libs/gnome-vfs-init.o
In file included from /usr/include/libbonobo-2.0/bonobo/bonobo-object.h:17,
                 from /usr/include/libbonobo-2.0/bonobo/bonobo-types.h:16,
                 from /usr/include/libbonobo-2.0/libbonobo.h:18,
                 from gnome-vfs-client.c:3:
/usr/include/libbonobo-2.0/bonobo/Bonobo.h:6334: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
In file included from /usr/include/libbonobo-2.0/bonobo/bonobo-object.h:17,
                 from gnome-vfs-client.h:4,
                 from gnome-vfs-init.c:31:
/usr/include/libbonobo-2.0/bonobo/Bonobo.h:6334: internal compiler error: Bus error
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
make[3]: *** [gnome-vfs-cancellation.lo] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: *** [gnome-vfs-client.lo] Error 1
make[3]: *** [gnome-vfs-init.lo] Error 1
make[2]: *** [all] Error 2
make[2]: Leaving directory `/var/tmp/portage/gnome-vfs-2.8.3-r1/work/gnome-vfs-2.8.3/libgnomevfs'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/gnome-vfs-2.8.3-r1/work/gnome-vfs-2.8.3'
make: *** [all] Error 2


Anyone know how to solve this?

edit: I re-emeged libbonobo, and that solved this. Sadly doing so destroyed my progress on "emerge -e world" so I have to start it again now.
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suede
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PostPosted: Sun Jan 02, 2005 3:44 am    Post subject: Reply with quote

OK, one last time..

is it -Wl (small L)
or -W1 (as in half-way between zero and two)

I've just read the entire thread and half the posters have used l and the other half used 1!
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Lokheed
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PostPosted: Sun Jan 02, 2005 4:10 am    Post subject: Reply with quote

suede wrote:
OK, one last time..

is it -Wl (small L)
or -W1 (as in half-way between zero and two)

I've just read the entire thread and half the posters have used l and the other half used 1!


Well if you tried it with a 1, it would spit out an error saying its not a valid flag. If you tried it with a zero it would also spit out and error and not compile.

Its:

"(Minus)(Capital W)(Lowercase L)(comma)(Minus)(Capital O)(Number 1)"

Or just cp this into make.conf:
Code:

LDFLAGS="-Wl,-O1"
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charlieg
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PostPosted: Sun Jan 02, 2005 10:23 am    Post subject: Reply with quote

Well, after trying this, something has gone kaboom on my system. I can no longer compile anything, at all. It complains that, essentially, gcc can not compile anything. Switching to an older version of gcc does not help either.
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planetsheinker
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PostPosted: Sun Jan 02, 2005 4:21 pm    Post subject: Reply with quote

Added this LDFLAGS="-Wl,-O1" to /etc/make.conf
and recomiled Thunderbird.
Before it took 7-10 sec to start and now it took 7 sec to start for the first time and 3!!!!! sec to start any time after that, I guess it takes a long time to cashe the binary.
This is great, going to do an "emerge -e system", and post the results when it's done:-)
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irf2003
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PostPosted: Sun Jan 02, 2005 5:22 pm    Post subject: Reply with quote

Pwnz3r wrote:
I have been using these flags since the start of this thread and I have not any problems with my programs. :D

@Pwnz3r,
just for the records, could you be more specific as to what loader flags are being referred to?
TIA
happy gentooing
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PostPosted: Mon Jan 03, 2005 3:59 pm    Post subject: Reply with quote

planetsheinker wrote:
Added this LDFLAGS="-Wl,-O1" to /etc/make.conf
and recomiled Thunderbird.
Before it took 7-10 sec to start and now it took 7 sec to start for the first time and 3!!!!! sec to start any time after that, I guess it takes a long time to cashe the binary.
This is great, going to do an "emerge -e system", and post the results when it's done:-)

Replayng to myself :-)
"emerge -e system" spited some error, but just as I was going to post it (e.g copy/paste), the power whent down :-(
Is there some log file that the error might have been loged?
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aethyr
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PostPosted: Mon Jan 03, 2005 6:14 pm    Post subject: Reply with quote

I feel compelled to reply, since I started this topic.

To those having problems (charlieg and planetsheinker), can you be more descriptive in what has gone wrong so people can assist you?

charlieg: I haven't heard of anyone breaking their system yet with LDFLAGS="-Wl,-O1". I don't know about any of the other flags. The worst that I've heard happen is a package won't compile.

planetsheinker: You'll have to rerun the emerge again for the failed package to get the error message. You can however get an idea by going to /var/tmp/portage/ and looking in the package directory. When a package fails, I believe it keeps a /work/ directory open? I might be wrong, but if you go into that /work/ directory, and type "make" it should reproduce the error.
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rawoul
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PostPosted: Mon Jan 03, 2005 7:02 pm    Post subject: Reply with quote

I recompiled all my system with LDFLAGS="-Wl,-O1 -Wl,--enable-new-dtags -Wl,--sort-common -s" and everything works fines \o/. I don't think i can feel a difference in speed though ...
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PostPosted: Wed Jan 05, 2005 5:28 pm    Post subject: Reply with quote

Is there any way to see what LDFLAGS a binary was compiled with?
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PostPosted: Wed Jan 05, 2005 5:55 pm    Post subject: Reply with quote

hotwok wrote:
Is there any way to see what LDFLAGS a binary was compiled with?
I don't know if there is an "official command" to do this, but try something like...
Code:
cat /var/db/pkg/app-arch/gzip-1.3.5-r5/LDFLAGS
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PostPosted: Wed Jan 05, 2005 6:29 pm    Post subject: Reply with quote

gkmac wrote:
hotwok wrote:
Is there any way to see what LDFLAGS a binary was compiled with?
I don't know if there is an "official command" to do this, but try something like...
Code:
cat /var/db/pkg/app-arch/gzip-1.3.5-r5/LDFLAGS


thanks. i recompiled KDE and XFCE4 with the ldflags -Wl,-O1 and i think i notice a shorter startup time for XFCE4 but im not sure, it could be placebo :)
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malloc
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PostPosted: Wed Jan 05, 2005 6:50 pm    Post subject: Reply with quote

hotwok wrote:
gkmac wrote:
hotwok wrote:
Is there any way to see what LDFLAGS a binary was compiled with?
I don't know if there is an "official command" to do this, but try something like...
Code:
cat /var/db/pkg/app-arch/gzip-1.3.5-r5/LDFLAGS


thanks. i recompiled KDE and XFCE4 with the ldflags -Wl,-O1 and i think i notice a shorter startup time for XFCE4 but im not sure, it could be placebo :)

It's not a placebo, xfce4 does start faster after re-compiling it with -Wl,-O1
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PostPosted: Wed Jan 05, 2005 9:47 pm    Post subject: Reply with quote

I tried to recompile some apps with LDFLAGS, and startup times are slightly faster. Now recompiling whole system with LDFLAGS="-Wl,-O1" ;)
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PostPosted: Thu Jan 06, 2005 3:44 pm    Post subject: Reply with quote

I don't know if I should put this LDFLAGS now or not, because it still didnt come out, if it really got no drawbacks.

And someone said it could really mess up security.

so can I use them without having to be worried ?
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echo 'LDFLAGS="-Wl,-O1"' >> /etc/make.conf - no problems here
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PostPosted: Thu Jan 06, 2005 11:12 pm    Post subject: Reply with quote

Wee! I feel compelled to reply since I got my new install up and running (had a few easily solved Grub issues). I've bootstrapped and done the entire install as ~x86 with LDFLAGS="-Wl,-O1" and all is fine. Maybe it's just placebo...maybe it's just the faster hard disk, but things seem a lot snappier. :D
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PostPosted: Thu Jan 06, 2005 11:46 pm    Post subject: Reply with quote

just wondering! can i use LDFLAGS and prelinking or do they exclude each other?
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PostPosted: Fri Jan 07, 2005 12:20 am    Post subject: Reply with quote

codergeek42 wrote:
Wee! I feel compelled to reply since I got my new install up and running (had a few easily solved Grub issues). I've bootstrapped and done the entire install as ~x86 with LDFLAGS="-Wl,-O1" and all is fine. Maybe it's just placebo...maybe it's just the faster hard disk, but things seem a lot snappier. :D


nice to hear 8)
Can you post here if any strange issues occur ? thx !
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echo 'LDFLAGS="-Wl,-O1"' >> /etc/make.conf - no problems here
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codergeek42
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PostPosted: Fri Jan 07, 2005 1:07 am    Post subject: Reply with quote

loki99 wrote:
just wondering! can i use LDFLAGS and prelinking or do they exclude each other?
If I understand correctly, using these LDFLAGS basically does what prelinking does, but in a safer way (not modyfing the binaries, just changing the way they're linked to shared libraries).
blueSceaDa wrote:
Can you post here if any strange issues occur ? thx !
Deal 8)
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PostPosted: Fri Jan 07, 2005 1:48 am    Post subject: Reply with quote

i've heard that and i've heard they are two seperate things. anyways, it doesn't stop you from prelinking, i just don't know if it has an additional benefit to it.

BTW, --enable-new-dtags is enabled in newer binutils by default
http://bugs.gentoo.org/show_bug.cgi?id=65002#c7
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