Bug 247926 – net-analyzer/ethstatus: fails with forced --as-needed

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Diego Elio Pettenò (RETIRED) 2008-11-21 12:13:06 UTC]

I'm reporting this bug because the package in summary fails to build when forcing --as-needed on through spec files (check out http://blog.flameeyes.eu/2008/11/14/problems-and-mitigation-strategies-for-as-needed for details).

Check the attached build log.

Thanks,
Diego

[Comment 1 Diego Elio Pettenò (RETIRED) 2008-11-21 12:13:30 UTC]

Created attachment 172668 [details]
Build log

[Comment 2 Michele Noberasco (RETIRED) 2008-11-24 09:02:12 UTC]

Diego, this particular bug happens because /usr/lib/libncurses.so actually contains this:

/* GNU ld script
   Since Gentoo has critical dynamic libraries
   in /lib, and the static versions in /usr/lib,
   we need to have a "fake" dynamic lib in /usr/lib,
   otherwise we run into linking problems.

   See bug http://bugs.gentoo.org/4411 for more info.
 */
OUTPUT_FORMAT ( elf32-i386 )
GROUP ( /lib/libncurses.so )

and of course /lib/libncurses.so contains the missing symbols. I don't know how I should go about fixing this; do you?

[Comment 3 Diego Elio Pettenò (RETIRED) 2008-11-24 09:07:46 UTC]

No the ldscript is fine, the problem is that the linking order is wrong:

gcc -O2 -pipe -lncurses -o ethstatus ethstatus.c

-lncurses is passed before any object, so it's automatically discarded; the --as-needed fixing guides already contains a section about linking order.

[Comment 4 Michele Noberasco (RETIRED) 2008-11-24 09:56:14 UTC]

touché :-)

Fixed in Portage...