John Marino has removed gcc 4.4 in DragonFly, and replaced it with gcc 5.0. Two things to note: gcc 5 does not yet successfully build world, and DragonFly is an officially supported platform for gcc with this release.
A running description of activity related to DragonFly BSD.
I thought DF would migrate to Clang too :S
@Bruno: There are two compilers in base. Up until now, there was GCC 4.7 and 4.4. In the future, there will be GCC 5 and Clang 3.5 most likely.