To crosscompile for Win32 with mingw - Get and build libusb-win32-src-x.tar.gz from Sourceforge Version was "libusb-win32-src-0.1.12.1.tar.gz" for April 4, 2009 - Compile like "make host_prefix=i386-mingw32msvc all". Your prefixes may vary. - Copy src/usb.h to /opt/cross/i386-mingw32msvc/include/ - Copy *.a to /opt/cross/i386-mingw32msvc/lib/ - Create a build directory like "mkdir build-win32", e.g in ../libftdi/ - cd in that directory and run "cmake -DCMAKE_TOOLCHAIN_FILE=../Toolchain-mingw32.cmake .." - Copy src/ftdi.h to /opt/cross/i386-mingw32msvc/include/ - Copy build-win32/src/*.a to /opt/cross/i386-mingw32msvc/lib/