LDFLAGS in /etc/makepkg.conf

nightfrost · 2005-05-19 16:32:24

Will adding

export LDFLAGS="-Wl,-O1 -Wl,--sort-common -s

to /etc/makepkg.conf, enable compilation with those flags when makepkg is executed?

Gullible Jones · 2005-05-19 19:32:58

-s? That might not be wise.

phrakture · 2005-05-19 19:44:54

nightfrost wrote:

Will adding
export LDFLAGS="-Wl,-O1 -Wl,--sort-common -s
to /etc/makepkg.conf, enable compilation with those flags when makepkg is executed?

not all the time... it will in most though...
however, some Makefiles don't pickup external CFLAGS/LDFLAGS, so you will see some sed usage to insert the CFLAGS... you'd have to do the same for LDFLAGS there too...

I'd also add the --as-needed flag to those if you're recompiling something like KDE/gnome

i3839 · 2005-05-19 20:08:55

The --as-needed flag should be default for all apps, though it has a bigger impact on the bigger bloated apps with buggy buildsystems.

nightfrost · 2005-05-20 11:30:08

Thanks for the replies. I don't fully understand every LDFLAG-option, but I've heard that prelink (which I used to run) should be avoided and LDFLAGS used instead. These particular flags were posted somewhere and claimed to be conservative and safe. You guys seem to disagree, no? I'm not interested in a flaky system, but I want some LDFLAGS-optimizations that are.. well... safe

What's your take on prelink vs. LDFLAGS?

i3839 · 2005-05-20 14:16:42

Use something like -Wl,-O1 -Wl,--as-needed -Wl,--sort-common -s and avoid prelink. -s just strips the library, which is done one way or the other anyway. No one is disagreeing, with ld flags instead of prelink here I hope, it's just that not every makefile/buildsystem honours the LDFLAGS environment variable.

phrakture · 2005-05-20 15:06:20

i3839 wrote:

Use something like -Wl,-O1 -Wl,--as-needed -Wl,--sort-common -s and avoid prelink. -s just strips the library, which is done one way or the other anyway. No one is disagreeing, with ld flags instead of prelink here I hope, it's just that not every makefile/buildsystem honours the LDFLAGS environment variable.

I have no clue what --sort-common does (but I can speculate)... -O1 is for link optimization, and --as-needed is for ELF header shared library listings/loading...

i3839 · 2005-05-20 16:32:11

me neither, but I copied his and added the more important --as-needed. It won't hurt I guess.

phrakture · 2005-05-20 18:56:36

it appears the original LDFLAGS are taken from here:
http://forums.gentoo.org/viewtopic.php?t=67777

check there for what they do...

nightfrost · 2005-05-22 16:12:32

Thanks alot for your replies

Phrakture, the thread you linked to looks familiar. That is most probably where I got the LDFLAGS from.

Arch Linux

#1 2005-05-19 16:32:24

LDFLAGS in /etc/makepkg.conf

#2 2005-05-19 19:32:58

Re: LDFLAGS in /etc/makepkg.conf

#3 2005-05-19 19:44:54

Re: LDFLAGS in /etc/makepkg.conf

#4 2005-05-19 20:08:55

Re: LDFLAGS in /etc/makepkg.conf

#5 2005-05-20 11:30:08

Re: LDFLAGS in /etc/makepkg.conf

#6 2005-05-20 14:16:42

Re: LDFLAGS in /etc/makepkg.conf

#7 2005-05-20 15:06:20

Re: LDFLAGS in /etc/makepkg.conf

#8 2005-05-20 16:32:11

Re: LDFLAGS in /etc/makepkg.conf

#9 2005-05-20 18:56:36

Re: LDFLAGS in /etc/makepkg.conf

#10 2005-05-22 16:12:32

Re: LDFLAGS in /etc/makepkg.conf

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