$ VirtualBox VirtualBox: supR3HardenedMainGetTrustedMain: dlopen("/opt/VirtualBox/VirtualBox.so",) failed: libjson.so.0: cannot open shared object file: No such file or directory With dev-libs/json-c-0.10-r1 working properly.
After you create a symbolic link libjson.so.0 -> /usr/lib64/libjson-c.so.2.0.1 VirtualBox was launched.
The package does not even depend to dev-libs/json-c since it is a binary only package, i dont think we can do anything else than restricting the version of the json-c library
+ 28 Apr 2013; Markos Chandras <hwoarang@gentoo.org> + virtualbox-bin-4.2.10.ebuild, virtualbox-bin-4.2.12.ebuild: + Add dev-libs/json-c to RDEPEND and restrict v0.11 since the library name + changed. Bug #467310 + http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/app-emulation/virtualbox-bin/virtualbox-bin-4.2.10.ebuild?r1=1.1&r2=1.2 http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/app-emulation/virtualbox-bin/virtualbox-bin-4.2.12.ebuild?r1=1.1&r2=1.2
Sorry that did not answer, but the problem with Virtualboks-bin is related to pulseaudio. On my system, the sound output through pulseaudio. After the transition to dev-libs/json-ts-0.11 having problems in his work. Pulseaudio linked with libyson.so.0, while in the new version dev-libs/json-c have not library or links with this name. Here's a bug https://bugs.gentoo.org/show_bug.cgi?id=467280. After upgrading to media-sound/pulseaudio-3.0-r1 no problems running Virtualboks. So the no need to add depending app-emulation/virtualbox-bin dev-libs/json-ts-0.10-r1. Once again, I apologize.
+ 06 May 2013; Markos Chandras <hwoarang@gentoo.org> + virtualbox-bin-4.2.10.ebuild, virtualbox-bin-4.2.12.ebuild: + Restore json-c depends per https://bugs.gentoo.org/show_bug.cgi?id=467310#c4 +
