6.61.10 Diagnostic Pragmas, https://gcc.gnu.org/onlinedocs/gcc/Diagnostic-Pragmas.html, does not tell us when it became available. I've been through the change logs from 44 through 4.8, and I can't tell when it became available (https://gcc.gnu.org/gcc-4.4/changes.html, https://gcc.gnu.org/gcc-4-5/changes.html, https://gcc.gnu.org/gcc-4.6/changes.html, https://gcc.gnu.org/gcc-4.7/changes.html, https://gcc.gnu.org/gcc-4.8/changes.html). When did 'pragma diagnostic' become available?
