Building DLL using Visual Studio 2015

As specified ​here, the library support generation of dynamic link libraries (dll).

This guide is the updated version, which will describe the needed steps to build using Visual Studio 2015.

1. config_site.h modification

   #define PJ_DLL  1
   #ifdef _LIB
   #    define PJ_EXPORTING 1
   #endif
   

2. Source code modification

Apply the patch attached. Note that the patch is against 2.7.1, and is considered to be committed and included in 2.8.

3. Projects file modification

   - Change project default (Configuration Properties > General > Configuration Type) to Dynamic Library (.dll). 
   - Add the library input (Configuration Properties > Linker > Input) needed by the library. e.g: pjlib needs ws2_32.lib
   - Add the library References, e.g: pjlib-util needs a reference from pjlib