🚀 go-pugleaf

I get the following warnings trying to compile diff 2.0 on the NeXT (NeXTstep  
2.1).

I can send the man page for wait if necessary.

gcc -O -c -g  -DSYSDIR=1 -DSTDC_HEADERS=1 -Dpid_t=int -DHAVE_DUP2=1  
-DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -DHAVE_ST_BLKSIZE=1 diff.c
system.h:92: warning: index redefined
system.h:93: warning: rindex redefined
system.h:94: warning: bcopy redefined
system.h:95: warning: bcmp redefined
system.h:96: warning: bzero redefined

gcc -O -c -g  -DSYSDIR=1 -DSTDC_HEADERS=1 -Dpid_t=int -DHAVE_DUP2=1  
-DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -DHAVE_ST_BLKSIZE=1 regex.c
regex.c:50: warning: bcmp redefined
regex.c:51: warning: bcopy redefined
regex.c:52: warning: bzero redefined

gcc -O -c -g  -DSYSDIR=1 -DSTDC_HEADERS=1 -Dpid_t=int -DHAVE_DUP2=1  
-DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -DHAVE_ST_BLKSIZE=1  
-DDIFF_PROGRAM=\"/usr/local/bin/diff\" ./diff3.c
./diff3.c: In function read_diff:
./diff3.c:1219: warning: argument passing between incompatible pointer types

gcc -O -c -g  -DSYSDIR=1 -DSTDC_HEADERS=1 -Dpid_t=int -DHAVE_DUP2=1  
-DHAVE_MEMCHR=1 -DHAVE_STRERROR=1 -DHAVE_ST_BLKSIZE=1  
-DDIFF_PROGRAM=\"/usr/local/bin/diff\" ./sdiff.c
./sdiff.c: In function waitpid:
./sdiff.c:236: warning: argument passing between incompatible pointer types