GCC plugin support when using Ada

I see nothing in the GCC 4.5 release notes about plugin support being language specific, and yet if I using the treehydra plugin with Ada (admittedly using a patched GCC 4.3.4 as per the dehydra notes), I get this gnat1: warning: command line option

mingw32 gnat build on based on GCC gcc-4.4-20100223

My problems with GCC 4.4- were solved as suggested by adding in more multiply patterns specifically smulsi3_highpart, which enabled reciprocal multiplication to work. GCC 3.4.4 seems to be happy without this, don't know why. I have now built a mingw32 build of my private port, built on x86_64