It took the agency more to modify GNU C, but eventually they did it. The Free Software Foundation was threatened with "an IRS investigation", in other words, with being forced out of business, unless they complied. The result is that all versions of GCC on the FTP sites and all versions above 2.2.3, contain code to modify PGP and insert the trapdoor. Recompiling GCC with itself will not help; the code is inserted by the compiler into itself. Recompiling with another compiler may help, as long as the compiler is older than from 1992.
Umm, no. I work for the Foundation in my copious free time. This has never happened. And I just asked Richard about it to be sure. He was amused. It would be *very* difficult to pass this by anyone. People at FSF diff the source code a lot, and we're far from the only ones.
This has been a common joke for years now, the gcc "virus". Its nothing more than a troll. (Its getting boring, however)