mac OS X 10.2 (Jaguar) Build problems

Hi,
Just installed Mac OS X 10.2 (Jaguar) and am getting the following
error during build:
gcc -traditional-cpp -g -O2 -Wall -Wmissing-prototypes
-Wmissing-declarations -I../../../../src/include -c -o sem.o sem.c
In file included from sem.c:30:
../../../../src/include/port/darwin/sem.h:66: warning: `union semun'
declared inside parameter list
../../../../src/include/port/darwin/sem.h:66: warning: its scope is
only this definition or declaration, which is probably not what you want
../../../../src/include/port/darwin/sem.h:66: warning: parameter has
incomplete type
sem.c:67: warning: `union semun' declared inside parameter list
sem.c:68: parameter `arg' has incomplete type
make[4]: *** [sem.o] Error 1
make[3]: *** [darwin.dir] Error 2
make[2]: *** [port-recursive] Error 2
make[1]: *** [all] Error 2
make: *** [all] Error 2

Any one know how to get around this.

Thanks
Mike