Cross compiling libiio from linux to windows

Question

Hello, 
 I have a project with a cmakelist.txt that I cross compile to windows from ubuntu. This project depends on libiio and I know libiio is build also with cmake to allow cross compile. 
 When I build it using x86_64-w64-mingw32 i get the message from cmake: 
 
 [build] CMake Error at extern/libiio/CMakeLists.txt:295 (message): 
 [build] Libusb >= 1.0.10 is required. 
 
 Which is understandable. I only have the libusb on my ubuntu, not for windows. But i found no documentation for this on the wiki, so here is the question: 
 how in my cmakelist.txt do I add the libusb windows dlls so cmake can see it and use it to build libiio? 
 Also i might just be missing the point and dont need them, if so can someone point me in the right direction?

csuteu · Accepted Answer

Hello reinerstone , 
 Is there a particular reason for which you chose to cross-compile libiio? 
 Instead, you can download the libiio Windows MinGW DLLs from here: github.com/.../libiio-0.25-gb6028fd-windows.zip 
 Extract the archive and copy the Windows-MinGW-W64 and include folders to your project's SYSROOT location. 
 Then,from your project's CMakeLists.txt , you can link your program to the libiio DLLs, by adding the following lines : 
 find_library(LIBIIO_LIBRARIES iio) find_path(LIBIIO_INCLUDE_DIRS iio.h) 
 target_include_directories(your_target PUBLIC ${LIBIIO_INCLUDE_DIRS}) target_link_libraries(your_target PUBLIC ${LIBIIO_LIBRARIES}) 
 Your add_executable call should be after the calls for find_library and find path and before the calls for target_include_directories and target_link_libraries 
 Alternatively, you can leave the downloaded files where they are and tell cmake where to look for them : 
 find_library(LIBIIO_LIBRARIES iio HINTS "/path/to/Windows-MinGW-W64") find_path(LIBIIO_INCLUDE_DIRS iio.h HINTS "/path/to/include") 
 If you choose this approach, you will also have to edit the ToolChain file used for compiling and set the following : 
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY BOTH) set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH) 
 Let us know if this fixes your issue. 
 -- Cristina)