I am not sure what I am meant to do about these things. Yesterday I
found a warning or two which are treated as errors when compiling a
kernel with pcvt, so I duely posted to port-i386, today I tried
compiling usr.bin and got stuck in cksum:

cc   -o cksum cksum.o crc.o md5.o print.o sum1.o sum2.o 
cksum.o: Undefined symbol `_MD5File' referenced from text segment
md5.o: Undefined symbol `_MD5Data' referenced from text segment
md5.o: Undefined symbol `_MD5Init' referenced from text segment
md5.o: Undefined symbol `_MD5Update' referenced from text segment
md5.o: Undefined symbol `_MD5End' referenced from text segment
md5.o: Undefined symbol `_MD5Init' referenced from text segment
md5.o: Undefined symbol `_MD5Update' referenced from text segment
md5.o: Undefined symbol `_MD5End' referenced from text segment

all the missing symbols are declared in /usr/include/md5.h and defined
in /usr/src/lib/libc/md5c.c and so apparently not linked.

The thing is, all I am saying is, there is a problem here, not fixing
anything. What is a PR and is that what I should be trying to write
instead of posting here?

Patrick