Can't compile test programs of "date_time"

[tomcat1978]

Using boost_1_30_0.zip
Platform: windows XP + cygwin + gcc 3.2


Error Message:

$ g++ -I /cygdrive/g/boost_1_30_0/boost_1_30_0/ 
time_math.cpp
/cygdrive/c/DOCUME~1/TOMLI~1/LOCALS~1/Temp/cciyU
upf.o(.text$_ZN5boost9date_time1
5month_formatterINS_9gregorian10greg_monthENS0_13si
mple_formatEE12format_monthER
KS3_RSo+0x38):time_math.cpp: undefined reference to 
`boost::gregorian::greg_mont
h::as_short_string() const'
/cygdrive/c/DOCUME~1/TOMLI~1/LOCALS~1/Temp/cciyU
upf.o(.text$_ZN5boost9date_time1
5month_formatterINS_9gregorian10greg_monthENS0_13si
mple_formatEE12format_monthER
KS3_RSo+0x56):time_math.cpp: undefined reference to 
`boost::gregorian::greg_mont
h::as_long_string() const'
collect2: ld returned 1 exit status