#1 Installation under cygwin requires tweaking for netpbm

[Anonymous]

To compile pdf417decode (version 2.0) under cygwin on
Windows:
0) [Assuming cygwin and its gcc compiler already
installed.]
1) Install cygwin package libnetpbm-devel
2) Change '-lpbm' to '-lnetpbm' in line 17 of Makefile
3) Follow the usual installation instructions.

Once this is done, pdf417decode compiles and runs
correctly on the test images.

It would be a great help for new users if the project's
Readme.txt or Makefile mentioned the option of using
libnetpbm. (libnetpbm sometimes replaces libpbm in
various Linux installations too.) Simple build hints
for various environments would also be very useful.