netpbm library site: http://netpbm.sourceforge.net/
netpbm download site: https://sourceforge.net/p/netpbm/code/HEAD/tree/release_number/10.86.00

5/23/2019 - Updated NetPBM library to version 10.86.00, which is the latest released netpbm version (3/30/19)

All Siemens changes have been documented in the files as to what was changed

Added ifndef _WIN32 for all instances of unistd.h as this directory is only for Unix builds
Added ifdef _WIN32 for all instances of the netpbm directory as this directory is only for Unix builds
Added ifdef _WIN32 for all instances of pm_config.h as this directory is renamed pm_config.in.h on Windows
Initialized pointers due to errors during building 
Added typedefs in an ifdef _WIN32 block to pm_config.in.h
Added function definitions in an ifdef _MSC_VER block for pm_config.in.h
Added elif _WIN32 for mkstemp defintion in pm_config.in.h
Added to pmfileio.c beginning on line 129 to get temporary path directory on Windows
Removed from picttoppm.c beginning on line 1242 to support Windows 

To build on Windows: 
Created five VS projects: bmptopnm, giftopnm, pcxtoppm, pamtogif, picttoppm
Run visual studio project to create executable
Added resource entry for version info for each executable
To test, navigate to directory where executable is through command prompt and run exe with first argument as the file 
planning to convert and then redirecting it to a new file of the correct type

EXAMPLE: >> pamtogif frosty8.ppm > frosty8.gif 

To build on Unix:
Use the command configure
Note: If changing platforms, use make clean first, then configure
If asked to discard existing config.mk files, yes
Use default for all prompts except static or shared prompt: type static
Once configured, navigate to converter/other directory and make pamtogif, giftopnm, bmptopnm with the command make
Navigate to converter/ppm and make pcxtoppm and picttoppm with command make 
To test, navigate to directory where executable is and run exe with first argument as the file 
planning to convert and then redirecting it to new file of the correct type

EXAMPLE: >> pamtogif frosty8.ppm > frosty8.gif 

