Bug 374559

Summary:	media-libs/libdc1394 and dev-libs/libusb:0 are incompatible
Product:	Gentoo Linux	Reporter:	Dirk Tilger <dirk>
Component:	[OLD] Library	Assignee:	Stefaan De Roeck (RETIRED) <stefaan>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	380287

Description Dirk Tilger 2011-07-09 16:43:02 UTC

media-libs/libdc1394 and dev-libs/libusb:0 both export a function 'usb_init' that in C namespace. Depending on which order the libraries are linked, the linker will either pick the one or the other.

When digikam-2.0.0-rc is compiled with USE=gphoto2 and media-libs/opencv with USE=ieee1394, it will crash upon connecting a USB camera as the libdc1394's 'usb_init' will be used instead of the libusb one.

Part of the problem is that libdc1394 exports its entire namespace. libdc1394's 'usb_init' is not intended for usage by consumers of the library, but only internally. I therefore suggest to set a blocker on media-libs/libdc1394-2.1.3 for dev-libs/libusb:0. I'm currently testing a patch for libdc1394's upstream.

Comment 1 Dirk Tilger 2011-07-10 05:07:22 UTC

Uplink bug:
https://sourceforge.net/tracker/?func=detail&aid=3361405&group_id=8157&atid=308157

Comment 2 Samuli Suominen (RETIRED) gentoo-dev

2011-09-13 18:00:42 UTC

*libdc1394-2.1.3-r1 (06 Sep 2011)

  06 Sep 2011; Andreas K. Huettel <dilfridge@gentoo.org>
  +files/libdc1394-usbinit.patch, +libdc1394-2.1.3-r1.ebuild:
  Non-maintainer fix: add upstream patch to avoid usb_init symbol conflict, bug
  380287