Problem: on a Slackware64 multilib system, 32bit applications will not use the current GTK theme by default.
Solution: first, make your system multilib, following AlienBob’s instructions and check the corresponding section from Slackware-FAQ. I used exactly same engine as the example — murrine. So:
Install murrine and murrine-themes from SlackBuilds.org. I took the 32bit murrine engine from a virtual machine running Slackware32 and converted it to a compat32 package:
convertpkg-compat32 -i murrine-0.98.1.1-i486-1_SBo.tgz -e tgz
I prefer to keep the tgz extension, so I can easily open the package with
file-roller and check that all is fine. If some of the contents will overwrite files from murrine-0.98.1.1-x86_64-1_SBo.tgz, delete them and save the tgz. Install it from
/tmp and let’s make programs use the murrine engine. In case of Skype I created a “wrapper”
#!/bin/sh "export GTK_PATH=/usr/lib/gtk-2.0" /usr/bin/skype
[Desktop Entry] Name=Skype Comment=Skype Internet Telephony #Exec=skype %U Exec=/usr/local/bin/skype-gtk Icon=skype.png Terminal=false Type=Application Encoding=UTF-8 Categories=Network;Application; MimeType=x-scheme-handler/skype; X-KDE-Protocols=skype
Save and restart Skype if running. Since Skype is a QT4 application, check the previous post about making QT4 apps inherit your GTK settings.
UPDATE (09 May 2015): creating a “wrapper” and modifying the
.desktop file are no longer needed.