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# Try to find the libusb library
# Once done this defines
#
# LIBUSB_FOUND - system has libusb
# LIBUSB_INCLUDE_DIR - the libusb include directory
# LIBUSB_LIBRARIES - Link these to use libusb
# LIBUSB::LIBUSB - CMake imported library target
# Copyright (c) 2006, 2008 Laurent Montel, <montel@kde.org>
# Copyright (c) 2023 Jamie Smith <jsmith@crackofdawn.onmicrosoft.com>
# Copyright (c) 2025 A. Maitland Bottoms <bottoms@debian.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
if(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
# in cache already
set(LIBUSB_FOUND TRUE)
else(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
# use pkg-config to get the directories and then use these values in the
# FIND_PATH() and FIND_LIBRARY() calls
find_package(PkgConfig)
pkg_check_modules(PC_LIBUSB libusb-1.0)
set(LIBUSB_LIBRARY_NAMES usb-1.0)
if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
set(LIBUSB_LIBRARY_NAMES usb)
elseif(CMAKE_SYSTEM_NAME STREQUAL "Windows")
# vcpkg's libusb-1.0 has a "lib" prefix, but on Windows MVSC, CMake doesn't
# search for static libraries with lib prefixes automatically.
list(APPEND LIBUSB_LIBRARY_NAMES libusb-1.0)
endif()
find_path(LIBUSB_INCLUDE_DIR libusb.h PATHS ${PC_LIBUSB_INCLUDEDIR}
${PC_LIBUSB_INCLUDE_DIRS})
find_library(
LIBUSB_LIBRARIES
NAMES ${LIBUSB_LIBRARY_NAMES}
PATHS ${PC_LIBUSB_LIBDIR} ${PC_LIBUSB_LIBRARY_DIRS})
endif(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LIBUSB DEFAULT_MSG LIBUSB_LIBRARIES
LIBUSB_INCLUDE_DIR)
mark_as_advanced(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
if(LIBUSB_FOUND AND NOT TARGET LIBUSB::LIBUSB)
add_library(LIBUSB::LIBUSB INTERFACE IMPORTED)
set_target_properties(
LIBUSB::LIBUSB
PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${LIBUSB_INCLUDE_DIR}"
INTERFACE_LINK_LIBRARIES "${LIBUSB_LIBRARIES}")
endif()
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