ppsldisc.c Undeclared Identifier Cross-Compiling using Entware/OpenWRT on Debian 11 (Bullseye)

[garycnew]

ppsldisc.c: In function 'main':
ppsldisc.c:39:14: error: 'N_PPS' undeclared (first use in this function); did you mean 'N_PPP'?
int ldisc = N_PPS;
^~~~~
N_PPP
ppsldisc.c:39:14: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [: ppsldisc.o] Error 1