Compile issues: LIBUSB_1 with cmake project on Windows - c++

Question

First Attempt
In my cmake/c++ project I get the following error when compiling:
C:\local\projects\synergy-usb\synergy-through-usb-master>cmake .
You have called ADD_LIBRARY for library cryptopp without any source files. This typically indicates a problem with your CMakeLists.txt file
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LIBUSB_1_INCLUDE_DIR
used as include directory in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/arch
used as include directory in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/net
LIBUSB_1_LIBRARY
linked by target "arch" in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/arch
-- Configuring incomplete, errors occurred!
See also "C:/local/projects/synergy-usb/synergy-through-usb-master/CMakeFiles/CMakeOutput.log".
So I am missing libusb libraries.
Second Attempt
So now I have found a version of libusb_1 (libusbx-1.0.18-win) which includes the folders:
examples
include
MinGW32
MinGW64
MS32
MS64
I copied MS64/dll (windows 64-bit) contents and put it here:
C:\local\libs\libusbx
I added this path to my PATH variable and then tried to run cmake again:
C:>cd local\projects\synergy-usb\synergy-through-usb-master
C:\local\projects\synergy-usb\synergy-through-usb-master>cmake .
You have called ADD_LIBRARY for library cryptopp without any source files. This typically indicates a problem with your CMakeLists.txt file
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
LIBUSB_1_LIBRARY
linked by target "arch" in directory C:/local/projects/synergy-usb/synergy-through-usb-master/src/lib/arch
-- Configuring incomplete, errors occurred!
See also "C:/local/projects/synergy-usb/synergy-through-usb-master/CMakeFiles/CMakeOutput.log".
Now I am stuck again. I have no idea what it wants me to do. It knows where libusb is...
Edit
Here is the contects (part of) the CMakeLists.txt that has libusb in it:
find_package(libusb-1.0 REQUIRED)
set(inc
.
../base
../common
../mt
../platform
../synergy
${LIBUSB_1_INCLUDE_DIRS}
)
if (UNIX)
list(APPEND inc
../../..
../arch
)
endif()
include_directories(${inc})
add_library(arch STATIC ${src})
set(libs
../lib
${LIBUSB_1_LIBRARIES}
)
if (WIN32)
if (GAME_DEVICE_SUPPORT)
list(APPEND libs synxinhk)
endif()
endif()
target_link_libraries(arch ${libs})
Edit 2
I added the following lines into the findlibusb-1.0.cmake file:
set(LIBUSB_1_LIBRARY C:\\local\\libs\\libusbx\\libusb-1.0.dll)
message(STATUS "***********************************> LIBUSB_1_LIBRARY: ${LIBUSB_1_LIBRARY}")
Here is the output from that:
C:\local\projects\synergy-usb\synergy-through-usb-master>cmake .
-- ***********************************> LIBUSB_1_LIBRARY: C:\local\libs\libusbx\libusb-1.0.dll
-- Found libusb-1.0:
-- - Includes: C:/local/libs/libusbx
-- - Libraries: C:\local\libs\libusbx\libusb-1.0.dll
You have called ADD_LIBRARY for library cryptopp without any source files. This typically indicates a problem with your CMakeLists.txt file
-- Configuring done
CMake Error: CMake can not determine linker language for target: cryptopp
CMake Error: CMake can not determine linker language for target: cryptopp
CMake Error: CMake can not determine linker language for target: cryptopp
CMake Error: CMake can not determine linker language for target: cryptopp
-- Generating done
-- Build files have been written to: C:/local/projects/synergy-usb/synergy-through-usb-master
Still does not build, but this particular library seems to be added ok now :)

Answer 1

synergy had such approach to keep some 3rd party libs compressed in zip in ext subdirectory. synergy-through-usb though kept cmake way to specify include through -DLIBUSB_1_INCLUDE_DIR=... -DLIBUSB_1_LIBRARY=... for Windows.
So you just need go to 'ext' directory and uncompress its zip archives with libraries gtest, gmock and crypto.