The devtools-3 eclipse packages seem to be missing the sac-1.3-17 dependency: When I install on a minimal SL7 installation and try to start eclipse from this dectoolset, it will crash. An strace revealed that the /opt/rh/devtoolset-3/root/usr/lib64/eclipse/plugins/org. w3c.css.sac_1.3.0.v200805290154.jar file is symbolically linked to /usr/share/java/sac.jar. This file is missing when the sac package is not installed. The devtoolset-4 eclipse packages seem to be ok, if I install the dectoolset-4 packages, the sac package is installed as one of it's depencenies.
