Building on arch linux fails because cmake is looking for both libusb and libusb-1.0

[Dragon20C]

System : Manjaro linux (arch based)

Steps to reproduce:
1: Git clone repo
2: make new folder/dir named build
3: run cmake ..

it will fail with a message of libusb not installed, checking the cmakelist in (psmoveapi/src/utils/CMakeLists.txt)
and I see that it checks for both libusb and libusb-1.0 instead of checking for if one or the other exists.

fix: Just make a simple check to see if one or the other exist and if they do setup those packages else print not installed message.

[thp]

Do you have a fix as pull request? Also, do you have the logs of the failure message? Thanks.

[Dragon20C]

I can provide the error in the terminal ->

[USERNAME@USERNAME-PC build]$ cmake ..
-- Found PkgConfig: /usr/bin/pkg-config (found version "2.5.1")
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Checking for module 'dbus-1'
-- Found dbus-1, version 1.16.2
-- Checking for module 'libudev'
-- Found libudev, version 258
-- Checking for module 'bluez>=5'
-- Found bluez, version 5.85

Tracker
Tracker library: Yes (OpenCV version 4.12.0)
Camera control driver: V4L2
CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:1093 (message):
The following required packages were not found:

• libusb

Call Stack (most recent call first):
/usr/share/cmake/Modules/FindPkgConfig.cmake:1166 (_pkg_check_modules_internal)
src/utils/CMakeLists.txt:24 (pkg_check_modules)
src/CMakeLists.txt:177 (include)
CMakeLists.txt:29 (include)

-- Configuring incomplete, errors occurred!

Now I dont have much experience with cmake or cmake lists but the solution/fix would be simply making the six axis part of code be a simple if statement if the user has disabled it.

if (PSMOVE_USE_SIXPAIR OR PSMOVE_BUILD_TRACKER)
  if (WIN32)
    include(${CMAKE_CURRENT_LIST_DIR}/libusb.cmake)
    target_link_libraries(psmove ${LIBUSB_LIBRARIES})
  else()
    # sixpair needs libusb
    if (PSMOVE_USE_SIXPAIR)
      find_package(PkgConfig REQUIRED)
      pkg_check_modules(LIBUSB REQUIRED libusb QUIET)
      include_directories(${LIBUSB_INCLUDE_DIRS})
      target_link_libraries(psmove ${LIBUSB_LIBRARIES})
    endif()

    # ps4/ps5 cams need libusb-1.0
    find_package(PkgConfig REQUIRED)
    pkg_check_modules(LIBUSB REQUIRED libusb-1.0 QUIET)
    include_directories(${LIBUSB_INCLUDE_DIRS})
    target_link_libraries(psmove ${LIBUSB_LIBRARIES})
  endif()
endif()