Although the dscussion regarding libstdc++-v3 is likely germaine to various developers who are currently testing their changes and managing the ports that they're responsible for, it seems that this thread is venturing rather far from my initial query.
I'm still wondering: Do GCC developers routinely test their patches on MIPS, ARM, and S390 platforms (for example)? I signed up for the 'cfarm' and don't see an S390 there, and some of the secondary targets look like they might be really SLOW? thanks, - Gary