Compile library with Visual Studio is not always easy if those have not been designed for Windows. This page describe some hacks to compile a few libraries.

Homepage : http://libexif.sourceforge.net/
Version used : 0.6.1

Steps :

• Download and uncompress the source code
• Create a win32 folder in the source tree (the one containing libexif, contrib, po,…)
• Create a Visual Studio project in this folder (select the .lib template)
• Add all files in libexif/ with the subfolders
• Download a copy from config.h written by Anthony Lawrence from https://github.com/alawrence/c_LibExifModule/blob/master/libexif-0.6.20/win32/lib_exif/config.h
• Modify it with your libexif version, and with the other changes you may want
• Be carefull to exclude from include and lib paths any existing libexif installation
• Add '.’ and '..’ in your include paths (to find config.h and <libexif/*>)
• Modify the file exif-entry.c on the line 1384 (unsigned short *utf16 = exif_mem_alloc (e→priv→mem, e→size+sizeof(unsigned short));) and move to the beginning of the scope the declaration of utf16 variable (line 833 : unsigned short *utf16;)
• Add preprocessor definitions : GETTEXT_PACKAGE=“libexif-12”;LOCALEDIR=
• And lastly, modify options according to that you need ; in my case (for RPhoto) :
  • Unicode
  • Set to MultiThread (/MT)
  • Static Library

It should compile and link well now.