Bug 248163 – net-print/ink: fails with forced --as-needed

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Diego Elio Pettenò (RETIRED) 2008-11-22 12:13:41 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) 2008-11-22 12:14:06 UTC]

Created attachment 172837 [details]
Build log

[Comment 2 Kevin Pyle 2009-01-17 18:48:16 UTC]

Created attachment 178806 [details, diff]
Patch to fix CFLAGS override and failure to link with --as-needed

This is the typical problem of placing the library list before the objects that require the symbols.  The upstream Makefile placed the library list in $CFLAGS, which happened to work since only one file is compiled, and it is compiled directly from ink.c to an output file, bypassing creation of ink.o.

This patch drops the overwrite of CFLAGS, so that the Makefile will honor user CFLAGS, and adds -linklevel to LDLIBS, which a quick check with "make -n -p" shows is used in the correct place in the implicit rule that make uses to compile a .c file directly to an output file.

[Comment 3 Diego Elio Pettenò (RETIRED) 2009-06-02 13:20:52 UTC]

Actually the patch is perfectly good so I'll just apply it even if I can't seem to build it. Thanks Kevin!

[Comment 4 Diego Elio Pettenò (RETIRED) 2009-12-27 13:44:25 UTC]

Reopening bug because Thilo dropped the patch.

[Comment 5 Diego Elio Pettenò (RETIRED) 2009-12-27 13:44:46 UTC]

Created attachment 214294 [details]
Build log

[Comment 6 Thilo Bangert (RETIRED) (RETIRED) 2010-01-02 12:13:44 UTC]

(In reply to comment #4)
> Reopening bug because Thilo dropped the patch.
> 

hhm, weird. it worked for me and i have --as-needed turned on.
nevertheless, the usage of CFLAGS is strange. i added a similar patch to 0.5.0 - could you test if it makes your build failure go away?

thanks
Thilo

[Comment 7 Kevin Pyle 2010-01-02 18:36:45 UTC]

(In reply to comment #6)
> hhm, weird. it worked for me and i have --as-needed turned on.

Do you have it via LDFLAGS in /etc/make.conf, or via the "forced" --as-needed that Diego uses?  net-print/ink-0.5.0 as shipped (without any Gentoo patches) has a Makefile that would not exhibit problems for LDFLAGS-based as-needed:

> make -n LDFLAGS=--as-needed
gcc -Wall -O2 -linklevel  --as-needed  ink.c   -o ink

Since the --as-needed appears after -linklevel, libinklevel will be brought in regardless of whether there is any need for it, so the build will succeed.  If I recall correctly, Diego's "forced" --as-needed not only guarantees its use, but places it before any other flags, so his command line is effectively:

gcc --as-needed -Wall -O2 -linklevel   ink.c   -o ink

[Comment 8 Thilo Bangert (RETIRED) (RETIRED) 2010-01-15 13:13:35 UTC]

flameeyes: could you run ink-0.5.0 on the tinderbox and verify that this issue is resolved?

thanks

[Comment 9 Diego Elio Pettenò (RETIRED) 2010-01-15 14:37:55 UTC]

Given it merged fine it seems good to go now.