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Fix version detection in Findhidapi.cmake #4215

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merged 5 commits into from
Aug 17, 2021
Merged

Fix version detection in Findhidapi.cmake #4215

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9a06f20
Findhidapi.cmake: Fix detection of Version 0 digits
daschuer Aug 17, 2021
4b0973c
Improve messages when linking hidapi
daschuer Aug 15, 2021
dc69785
Remove unreachable error message
daschuer Aug 17, 2021
826617f
Introduced a MINIMUM_hidapi_VERSION variable to avoid repeat the vers…
daschuer Aug 17, 2021
a3e6da5
Make use of FindPackageHandleStandardArgs() to format user message
daschuer Aug 17, 2021
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9 changes: 2 additions & 7 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -2605,9 +2605,8 @@ find_package(LibUSB)
# USB HID controller support
option(HID "USB HID controller support" ON)
if(HID)
find_package(hidapi)
# hidapi_VERSION is only available starting with 0.10.0
if(NOT hidapi_FOUND OR NOT hidapi_VERSION OR hidapi_VERSION VERSION_LESS 0.10.1)
find_package(hidapi 0.10.1)
if(NOT hidapi_FOUND)
message(STATUS "Linking internal libhidapi statically")
add_library(mixxx-hidapi STATIC EXCLUDE_FROM_ALL)
target_include_directories(mixxx-hidapi SYSTEM PUBLIC lib/hidapi/hidapi)
Expand All @@ -2630,10 +2629,6 @@ if(HID)
endif()
target_link_libraries(mixxx-lib PRIVATE mixxx-hidapi)
else()
message(STATUS "Linking libhidapi dynamically")
if(NOT HIDAPI_FOUND)
message(FATAL_ERROR "USB HID controller support requires libhidapi-libusb and its development headers.")
endif()
target_link_libraries(mixxx-lib PRIVATE hidapi::hidapi)
endif()
target_sources(mixxx-lib PRIVATE
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43 changes: 25 additions & 18 deletions cmake/modules/Findhidapi.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -62,29 +62,36 @@ find_library(hidapi_LIBRARY
)
mark_as_advanced(hidapi_LIBRARY)


# Version detection
if(DEFINED PC_hidapi_VERSION)
set(hidapi_VERSION "${PC_hidapi_VERSION}")
else()
if (EXISTS "${hidapi_INCLUDE_DIR}/hidapi.h")
file(READ "${hidapi_INCLUDE_DIR}/hidapi.h" hidapi_H_CONTENTS)
string(REGEX MATCH "#define HID_API_VERSION_MAJOR ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_MAJOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define HID_API_VERSION_MINOR ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_MINOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define HID_API_VERSION_PATCH ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_PATCH "${CMAKE_MATCH_1}")
# hidapi_VERSION is only available starting with 0.10.0
# Simply using if(NOT) does not work because 0 is a valid value, so compare to empty string.
if (NOT hidapi_VERSION_MAJOR STREQUAL "" AND
NOT hidapi_VERSION_MINOR STREQUAL "" AND
NOT hidapi_VERSION_PATCH STREQUAL "")
set(hidapi_VERSION "${hidapi_VERSION_MAJOR}.${hidapi_VERSION_MINOR}.${hidapi_VERSION_PATCH}")
endif()
endif()
endif ()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
hidapi
DEFAULT_MSG
hidapi_LIBRARY
hidapi_INCLUDE_DIR
REQUIRED_VARS hidapi_LIBRARY hidapi_INCLUDE_DIR
VERSION_VAR hidapi_VERSION
)

# Version detection
if (EXISTS "${hidapi_INCLUDE_DIR}/hidapi.h")
file(READ "${hidapi_INCLUDE_DIR}/hidapi.h" hidapi_H_CONTENTS)
string(REGEX MATCH "#define HID_API_VERSION_MAJOR ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_MAJOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define HID_API_VERSION_MINOR ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_MINOR "${CMAKE_MATCH_1}")
string(REGEX MATCH "#define HID_API_VERSION_PATCH ([0-9]+)" _dummy "${hidapi_H_CONTENTS}")
set(hidapi_VERSION_PATCH "${CMAKE_MATCH_1}")
# hidapi_VERSION is only available starting with 0.10.0
if (hidapi_VERSION_MAJOR AND hidapi_VERSION_MINOR AND hidapi_VERSION_PATCH)
set(hidapi_VERSION "${hidapi_VERSION_MAJOR}.${hidapi_VERSION_MINOR}.${hidapi_VERSION_PATCH}")
endif()
endif ()

if(hidapi_FOUND)
set(hidapi_LIBRARIES "${hidapi_LIBRARY}")
set(hidapi_INCLUDE_DIRS "${hidapi_INCLUDE_DIR}")
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