Commit d1b76db6 authored by Ryan Pavlik's avatar Ryan Pavlik Committed by Jakob Bornecrantz

cmake: Overhaul FindHIDAPI to handle multiple backends

parent af2756b5
# - try to find HIDAPI library
# from http://www.signal11.us/oss/hidapi/
#.rst:
# FindHIDAPI
# ----------
#
# Try to find HIDAPI library, from http://www.signal11.us/oss/hidapi/
#
# Cache Variables: (probably not for direct use in your scripts)
# HIDAPI_INCLUDE_DIR
......@@ -10,37 +13,216 @@
# HIDAPI_INCLUDE_DIRS
# HIDAPI_LIBRARIES
#
# Requires these CMake modules:
# FindPackageHandleStandardArgs (known included with CMake >=2.6.2)
# COMPONENTS
# ^^^^^^^^^^
#
# This module respects several COMPONENTS specifying the backend you prefer:
# ``any`` (the default), ``libusb``, and ``hidraw``.
# The availablility of the latter two depends on your platform.
#
#
# IMPORTED Targets
# ^^^^^^^^^^^^^^^^
# This module defines :prop_tgt:`IMPORTED` target ``HIDAPI::hidapi`` (in all cases or
# if no components specified), ``HIDAPI::hidapi-libusb`` (if you requested the libusb component),
# and ``HIDAPI::hidapi-hidraw`` (if you requested the hidraw component),
#
# Result Variables
# ^^^^^^^^^^^^^^^^
#
# ``HIDAPI_FOUND``
# True if HIDAPI or the requested components (if any) were found.
#
# We recommend using the imported targets instead of the following.
#
# ``HIDAPI_INCLUDE_DIRS``
# ``HIDAPI_LIBRARIES``
#
# Original Author:
# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
# 2009-2010, 2019 Ryan Pavlik <ryan.pavlik@collabora.com> <abiryan@ryand.net>
# http://academic.cleardefinition.com
# Iowa State University HCI Graduate Program/VRAC
#
# Copyright Iowa State University 2009-2010.
# Copyright Collabora, Ltd. 2019.
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
find_library(HIDAPI_LIBRARY
NAMES hidapi hidapi-libusb)
set(HIDAPI_ROOT_DIR "${HIDAPI_ROOT_DIR}" CACHE PATH "Root to search for HIDAPI")
# Clean up components
if(HIDAPI_FIND_COMPONENTS)
if(WIN32 OR APPLE)
# This makes no sense on Windows or Mac, which have native APIs
list(REMOVE HIDAPI_FIND_COMPONENTS libusb)
endif()
if(NOT ${CMAKE_SYSTEM} MATCHES "Linux")
# hidraw is only on linux
list(REMOVE HIDAPI_FIND_COMPONENTS hidraw)
endif()
endif()
if(NOT HIDAPI_FIND_COMPONENTS)
# Default to any
set(HIDAPI_FIND_COMPONENTS any)
endif()
# Ask pkg-config for hints
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
set(_old_prefix_path "${CMAKE_PREFIX_PATH}")
# So pkg-config uses HIDAPI_ROOT_DIR too.
if(HIDAPI_ROOT_DIR)
list(APPEND CMAKE_PREFIX_PATH ${HIDAPI_ROOT_DIR})
endif()
pkg_check_modules(PC_HIDAPI_LIBUSB QUIET hidapi-libusb)
pkg_check_modules(PC_HIDAPI_HIDRAW QUIET hidapi-hidraw)
# Restore
set(CMAKE_PREFIX_PATH "${_old_prefix_path}")
endif()
# Actually search
find_library(HIDAPI_UNDECORATED_LIBRARY
NAMES hidapi
PATHS
"${HIDAPI_ROOT_DIR}"
PATH_SUFFIXES
lib)
find_library(HIDAPI_LIBUSB_LIBRARY
NAMES hidapi hidapi-libusb
PATHS
"${HIDAPI_ROOT_DIR}"
PATH_SUFFIXES
lib
HINTS
${PC_HIDAPI_LIBUSB_LIBRARY_DIRS})
if(CMAKE_SYSTEM MATCHES "Linux")
find_library(HIDAPI_HIDRAW_LIBRARY
NAMES hidapi-hidraw
HINTS
${PC_HIDAPI_HIDRAW_LIBRARY_DIRS})
endif()
find_path(HIDAPI_INCLUDE_DIR
NAMES hidapi.h
PATHS
"${HIDAPI_ROOT_DIR}"
PATH_SUFFIXES
hidapi)
hidapi
include
include/hidapi
HINTS
${PC_HIDAPI_HIDRAW_INCLUDE_DIRS}
${PC_HIDAPI_LIBUSB_INCLUDE_DIRS})
find_package(Threads QUIET)
###
# Compute the "I don't care which backend" library
###
set(HIDAPI_LIBRARY)
# First, try to use a preferred backend if supplied
if(HIDAPI_FIND_COMPONENTS MATCHES "libusb" AND HIDAPI_LIBUSB_LIBRARY AND NOT HIDAPI_LIBRARY)
set(HIDAPI_LIBRARY ${HIDAPI_LIBUSB_LIBRARY})
endif()
if(HIDAPI_FIND_COMPONENTS MATCHES "hidraw" AND HIDAPI_HIDRAW_LIBRARY AND NOT HIDAPI_LIBRARY)
set(HIDAPI_LIBRARY ${HIDAPI_HIDRAW_LIBRARY})
endif()
# Then, if we don't have a preferred one, settle for anything.
if(NOT HIDAPI_LIBRARY)
if(HIDAPI_LIBUSB_LIBRARY)
set(HIDAPI_LIBRARY ${HIDAPI_LIBUSB_LIBRARY})
elseif(HIDAPI_HIDRAW_LIBRARY)
set(HIDAPI_LIBRARY ${HIDAPI_HIDRAW_LIBRARY})
elseif(HIDAPI_UNDECORATED_LIBRARY)
set(HIDAPI_LIBRARY ${HIDAPI_UNDECORATED_LIBRARY})
endif()
endif()
###
# Determine if the various requested components are found.
###
set(_hidapi_component_required_vars)
foreach(_comp IN LISTS HIDAPI_FIND_COMPONENTS)
if(${_comp} STREQUAL "any")
list(APPEND _hidapi_component_required_vars
HIDAPI_INCLUDE_DIR
HIDAPI_LIBRARY)
if(HIDAPI_INCLUDE_DIR AND EXISTS "${HIDAPI_LIBRARY}")
set(HIDAPI_any_FOUND TRUE)
mark_as_advanced(HIDAPI_INCLUDE_DIR)
else()
set(HIDAPI_any_FOUND FALSE)
endif()
elseif(${_comp} STREQUAL "libusb")
list(APPEND _hidapi_component_required_vars HIDAPI_INCLUDE_DIR HIDAPI_LIBUSB_LIBRARY)
if(HIDAPI_INCLUDE_DIR AND EXISTS "${HIDAPI_LIBUSB_LIBRARY}")
set(HIDAPI_libusb_FOUND TRUE)
mark_as_advanced(HIDAPI_INCLUDE_DIR HIDAPI_LIBUSB_LIBRARY)
else()
set(HIDAPI_libusb_FOUND FALSE)
endif()
elseif(${_comp} STREQUAL "hidraw")
list(APPEND _hidapi_component_required_vars HIDAPI_INCLUDE_DIR HIDAPI_HIDRAW_LIBRARY)
if(HIDAPI_INCLUDE_DIR AND EXISTS "${HIDAPI_HIDRAW_LIBRARY}")
set(HIDAPI_hidraw_FOUND TRUE)
mark_as_advanced(HIDAPI_INCLUDE_DIR HIDAPI_HIDRAW_LIBRARY)
else()
set(HIDAPI_hidraw_FOUND FALSE)
endif()
else()
message(WARNING "${_comp} is not a recognized HIDAPI component")
set(HIDAPI_${_comp}_FOUND FALSE)
endif()
endforeach()
unset(_comp)
###
# FPHSA call
###
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(HIDAPI
DEFAULT_MSG
HIDAPI_LIBRARY
HIDAPI_INCLUDE_DIR)
REQUIRED_VARS
${_hidapi_component_required_vars}
THREADS_FOUND
HANDLE_COMPONENTS)
if(HIDAPI_FOUND)
set(HIDAPI_LIBRARIES "${HIDAPI_LIBRARY}")
set(HIDAPI_INCLUDE_DIRS "${HIDAPI_INCLUDE_DIR}")
if(NOT TARGET HIDAPI::hidapi)
add_library(HIDAPI::hidapi UNKNOWN IMPORTED)
set_target_properties(HIDAPI::hidapi PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION ${HIDAPI_LIBRARY})
set_property(TARGET HIDAPI::hidapi PROPERTY
IMPORTED_LINK_INTERFACE_LIBRARIES Threads::Threads)
endif()
endif()
if(HIDAPI_libusb_FOUND AND NOT TARGET HIDAPI::hidapi-libusb)
add_library(HIDAPI::hidapi-libusb UNKNOWN IMPORTED)
set_target_properties(HIDAPI::hidapi-libusb PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION ${HIDAPI_LIBUSB_LIBRARY})
set_property(TARGET HIDAPI::hidapi-libusb PROPERTY
IMPORTED_LINK_INTERFACE_LIBRARIES Threads::Threads)
endif()
mark_as_advanced(HIDAPI_INCLUDE_DIR HIDAPI_LIBRARY)
if(HIDAPI_hidraw_FOUND AND NOT TARGET HIDAPI::hidapi-hidraw)
add_library(HIDAPI::hidapi-hidraw hidraw IMPORTED)
set_target_properties(HIDAPI::hidapi-libusb PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION ${HIDAPI_HIDRAW_LIBRARY})
set_property(TARGET HIDAPI::hidapi-hidraw PROPERTY
IMPORTED_LINK_INTERFACE_LIBRARIES Threads::Threads)
endif()
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