When i built seejpeg,i got the following error:

To build seejpeg, first obtain the library for v6 of libjpeg. This ought to be available from the same place that you obtained seejpeg. Having installed this first, type
make seejpeg

If compilation or linking fails and you did not compile libjpeg v6
yourself, I recommend doing that before filing a bug report.

After building the binary, to install it, type
make install
to install seejpeg in /usr/local/bin and the manual in /usr/local/man/man1

So where to get the library for v6 of libjpeg.I have not remember where i got seejpeg.