Bug 280922

Summary:	media-libs/libdecodeqr: fails configure with forced --as-needed
Product:	Gentoo Linux	Reporter:	Diego Elio Pettenò (RETIRED) <flameeyes>
Component:	New packages	Assignee:	Robin Johnson <robbat2>
Status:	RESOLVED WONTFIX
Severity:	QA	CC:	esigra, qa
Priority:	High	Flags:	robbat2: Bugday+
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://www.gentoo.org/proj/en/qa/asneeded.xml
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	129413
Attachments:	Build log config.log

Description Diego Elio Pettenò (RETIRED) gentoo-dev

2009-08-09 21:13:11 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).

Please note that this bug _might_ apply to -Wl,--as-needed in LDFLAGS as well; in both cases it should be fixed. Also, if this is due to the package in question not respecting user-defined LDFLAGS, you should get to fix that too.

Check the attached build log.

Thanks,
Diego

P.S.: in this case the problem is the test for opencv, so check the config.log as well; the problem is that cvCreateImage is not in libcv (-lcv) but rather in libcxcore.

Comment 1 Diego Elio Pettenò (RETIRED) gentoo-dev

2009-08-09 21:13:59 UTC

Created attachment 200730 [details]
Build log

Comment 2 Diego Elio Pettenò (RETIRED) gentoo-dev

2009-08-09 21:14:22 UTC

Created attachment 200731 [details]
config.log

Comment 3 Samuli Suominen (RETIRED) gentoo-dev

2010-06-28 10:26:45 UTC

After patching configure.in, AC_CHECK_LIB to find -lcv, it doesn't find the function it's looking from it:

checking for cvCreateImage in -lcv... no

Futhermore, the build will bail out long before that by setting *any* LDFLAGS to /etc/make.conf with:

checking for C++ compiler default output file name... 
configure: error: C++ compiler cannot create executables

Which is caused by this mess in the ebuild:

econf LDFLAGS="${LDFLAGS//-Wl,/ }" || die

Masked for removal, been in tree 2 years non-functional.

Comment 4 Samuli Suominen (RETIRED) gentoo-dev

2010-07-21 12:48:55 UTC

Removed from tree.