Conditionalize a pair of FreeBSD GCC extensions so that its CFLAGS are only used with FreeBSD GCC.
Conditionalize a pair of FreeBSD GCC extensions so that its CFLAGS are only
used with FreeBSD GCC.

Approved by:	kib (mentor)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase