pid_t define missing in include/miscadmin.h ...

Okay, I may be missing something here, but:

gmake[2]: Entering directory `/usr/local/pgsql/src/pgsql/src/backend/parser'
gcc -I../../include -I../../backend   -O2 -m486 -pipe -Wall -Wmissing-prototypes -Wmissing-declarations -I.. -Wno-error
 -c scansup.c -o scansup.o
 
In file included from scansup.c:20:
../../include/miscadmin.h:225: syntax error before `pid'
gmake[2]: *** [scansup.o] Error 1

Looking at include/miscadmin.h:

=========
extern int SetPidFile(pid_t pid);

#endif   /* MISCADMIN_H */
=========

but I can't find anywhere that pid_t is defined, and the cvs logs don't
appear to indicate that anyone has touched that file in a few weeks ...

So, am I missing something?  This is using CVS source as of today, on
FreeBSD 4.0-CURRENT ... 

Marc G. Fournier                   ICQ#7615664               IRC Nick: Scrappy
Systems Administrator @ hub.org 
primary: scrappy@hub.org           secondary: scrappy@{freebsd|postgresql}.org