솔라리스에 포스트 설치시 에러가 납니다..

이게 어떤 에러인지 아는 님들은 갈켜 주세요..

gcc /I../../include /I../../backend /Wall /Wmissing/prototypes /Wmissing/declarations /DFRONTEND /fPIC /c big5.c /o big5.o

ar crs libpq.a fe/auth.o fe/connect.o fe/exec.o fe/misc.o fe/print.o fe/lobj.o pqexpbuffer.o dllist.o pqsignal.o inet_aton.o common.o wchar.o

conv.o big5.o

make[2]: ar: Command not found

make[2]: *** [libpq.a] Error 127

make[2]: Leaving directory `/usr//postgresql/7.0.3/src/interfaces/libpq'

make[1]: *** [all] Error 2

make[1]: Leaving directory `/usr/postgresql/7.0.3/src/interfaces'

make: *** [all] Error 2