SET(CMAKE_SYSTEM_NAME Windows)

FIND_PROGRAM(CMAKE_C_COMPILER NAMES i686-mingw32-gcc i586-mingw32-gcc mingw32-gcc)
FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES i686-mingw32-g++ i586-mingw32-gcc mingw32-g++)

EXECUTE_PROCESS( 
   COMMAND ${CMAKE_C_COMPILER} -print-sysroot
   OUTPUT_VARIABLE CMAKE_FIND_ROOT_PATH
)

# Does not work - don't know why
SET(ENV{PKG_CONFIG_SYSROOT_DIR} ${CMAKE_FIND_ROOT_PATH})

set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)