Error in making Example Program

Hello!

Help me please. What i'm doing wrong? I just typed 'make'
in ../src/test/examples directory, and got such a messages:

/tmp/ccMibKh6.o(.text+0x1de): undefined reference to `PQexec'
/tmp/ccMibKh6.o(.text+0x1e6): undefined reference to `PQclear'
/tmp/ccMibKh6.o(.text+0x1f4): undefined reference to `PQexec'
/tmp/ccMibKh6.o(.text+0x1fc): undefined reference to `PQclear'
/tmp/ccMibKh6.o(.text+0x205): undefined reference to `PQfinish'
collect2: ld returned 1 exit status
make: *** [testlibpq] Error 1



Thanks for any suggestions.

Igor