[fpc-devel] Apologies, newbie question. How to make fpc use a different backend?

[dave at synergy.org]

Hello,
	I have successfully built a new compiler. I installed it via make
install INSTALL_PREFIX=... When I execute the new fpc command, however, it
uses the system ppca64, not the built one. "Which fpc" confirms that I am
using the proper fpc command. "fpc -PB" confirms that it is using the system
backend, i.e. /usr/bin/ppca64. . My reading of the -XP option to fpc is that
I should be able to override the default backend, but I have not been able
to do so. I am clearly missing something. I generated new .cfg files using
samplecfg and I know that PPC_CONFIG_PATH is correct. I can introduce an
error in fpc.cfg and fpc fails, so I know I am using the proper fpc.cfg
file. Nothing I do, either on the command line nor within the .cfg file
seems to direct fpc to use the proper ppca64 backend. What am I missing?
	Thank you, kindly,
	Dave