Your patch works nicely with cmake <= 2.8.12.0 or 2.8.12.1. Builds are clean. As you noted, the patch does not help with 2.8.12.0. I receive the same exact LINK_ONLY failure. As noted, the problem is described in the gentoo bugzilla: https://bugs.gentoo.org/show_bug.cgi?id=490194 The bug report mentions a specific patch and the patch became part of cmake 2.8.12.1. To my understanding, there is no downstream fix for this breakage with 2.8.12.0. The best we will be able to do for Trinity packagers is to let them know that Trinity will not build with 2.8.12.0. I asked the Slackware maintainer to update Slackware 14.1 to cmake 2.8.12.1 and I referenced the gentoo bugzilla. All I can do now is wait and see. I believe the Slackware maintainer avoided problems with cmake 2.8.12.0 in that the 2.8.12.0 was not updated in the Slackware 14.1 release cycle until just before RC1, well after all of the KDE packages had been built. Very likely he never saw the same build failures because he used cmake 2.8.10.2 to build the KDE4 packages for Slackware 14.1. Darrell