Potential issues under OpenBSD with libusb backend #798

openbsd78vm$ pwd
/home/mcuee/build/hidapi
openbsd78vm$ mkdir build
openbsd78vm$ mkdir install
openbsd78vm$ pkg-config --version libusb-1.0
2.4.3
openbsd78vm$ cmake -GNinja -B build -S . -DCMAKE_INSTALL_PREFIX=install -DHIDAPI_BUILD_HIDTEST=1
-- The C compiler identification is Clang 19.1.7
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- hidapi: v0.16.0
-- Found PkgConfig: /usr/bin/pkg-config (found version "2.4.3")
-- Checking for module 'libusb-1.0>=1.0.9'
-- Package dependency requirement 'libusb-1.0 >= 1.0.9' could not be satisfied.
Package 'libusb-1.0' has version '..', required version is '>= 1.0.9'
CMake Error at /usr/local/share/cmake/Modules/FindPkgConfig.cmake:645 (message):
 The following required packages were not found:
 - libusb-1.0>=1.0.9
Call Stack (most recent call first):
 /usr/local/share/cmake/Modules/FindPkgConfig.cmake:873 (_pkg_check_modules_internal)
 libusb/CMakeLists.txt:15 (pkg_check_modules)
-- Configuring incomplete, errors occurred!