Reg: File import&export problem

Hi...
Please help me in sorting out the below problem.
While doing importing and expoting files(This is first time i am using this concept)..i got the following error message.
Anything i have to include?
How to rectify it?
pls tell me to proceed further.......

: undefined reference to `lo_creat'
/tmp/ccYefhjF.o(.text+0x87): In function `importFile':
: undefined reference to `lo_open'
/tmp/ccYefhjF.o(.text+0xd3): In function `importFile':
: undefined reference to `lo_write'
/tmp/ccYefhjF.o(.text+0x121): In function `importFile':
: undefined reference to `lo_close'
/tmp/ccYefhjF.o(.text+0x145): In function `exportFile':
: undefined reference to `lo_open'
/tmp/ccYefhjF.o(.text+0x1bf): In function `exportFile':
: undefined reference to `lo_read'
/tmp/ccYefhjF.o(.text+0x22e): In function `exportFile':
: undefined reference to `lo_close'
/tmp/ccYefhjF.o(.text+0x255): In function `exit_nicely':
: undefined reference to `PQfinish'
/tmp/ccYefhjF.o(.text+0x2d5): In function `main':
: undefined reference to `PQsetdbLogin'
/tmp/ccYefhjF.o(.text+0x2e6): In function `main':
: undefined reference to `PQstatus'
/tmp/ccYefhjF.o(.text+0x315): In function `main':
: undefined reference to `PQerrorMessage'
/tmp/ccYefhjF.o(.text+0x34a): In function `main':
: undefined reference to `PQexec'
/tmp/ccYefhjF.o(.text+0x35b): In function `main':
: undefined reference to `PQclear'
/tmp/ccYefhjF.o(.text+0x37f): In function `main':
: undefined reference to `lo_import'
/tmp/ccYefhjF.o(.text+0x3a9): In function `main':
: undefined reference to `lo_export'
/tmp/ccYefhjF.o(.text+0x3bc): In function `main':
: undefined reference to `PQexec'

thanks,
Sandhya