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include(FindThreads)
set(PTHREADS_ENABLED FALSE)
if (CMAKE_USE_PTHREADS_INIT)
set(PTHREADS_ENABLED TRUE)
endif()
if (WIN32 OR "${CMAKE_SYSTEM_NAME}" STREQUAL "CYGWIN")
set(OS_WINDOWS 1 CACHE INTERNAL "controls config.h macro definition" FORCE)
# Enable MingW support for RC language (for CMake pre-2.8)
if (MINGW)
set(CMAKE_RC_COMPILER_INIT windres)
set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> <FLAGS> -O coff <DEFINES> -i <SOURCE> -o <OBJECT>")
endif()
enable_language(RC)
if ("${CMAKE_SYSTEM_NAME}" STREQUAL "CYGWIN")
message(STATUS "Detected cygwin")
set(PTHREADS_ENABLED TRUE)
set(WITHOUT_POLL_H TRUE CACHE INTERNAL "Disable using poll.h even if it's available - use windows poll instead fo cygwin's" FORCE)
endif()
list(APPEND PLATFORM_SRC
poll_windows.c
windows_usb.c
)
if (PTHREADS_ENABLED AND NOT WITHOUT_PTHREADS)
list(APPEND PLATFORM_SRC threads_posix)
else()
list(APPEND PLATFORM_SRC threads_windows.c)
endif()
elseif (APPLE)
# Apple != OSX alone
set(OS_DARWIN 1 CACHE INTERNAL "controls config.h macro definition" FORCE)
if ("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
set(PLATFORM_SRC
darwin_usb.c
threads_posix.c
)
find_package(IOKit REQUIRED)
list(APPEND LIBUSB_LIBRARIES ${IOKit_LIBRARIES})
# Currently only objc_registerThreadWithCollector requires linking against it
# which is only for MAC_OS_X_VERSION_MIN_REQUIRED >= 1060
include(CheckCSourceCompiles)
check_c_source_compiles(
"#include <AvailabilityMacros.h>
int main()
{
#if !(MAC_OS_X_VERSION_MIN_REQUIRED >= 1060)
#error \"Don't need objc\"
#endif
}
" NEED_OBJC_REGISTER_THREAD_WITH_COLLECTOR)
if (NEED_OBJC_REGISTER_THREAD_WITH_COLLECTOR)
find_library(LIBOBJC objc)
if (NOT LIBOBJC)
message(SEND_ERROR "Need objc library but can't find it")
else()
list(APPEND LIBUSB_LIBRARIES ${LIBOBJC})
endif()
endif()
endif()
elseif (UNIX)
# Unix is for all *NIX systems including OSX
if ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
set(OS_LINUX 1 CACHE INTERNAL "controls config.h macro definition" FORCE)
set(PLATFORM_SRC
linux_usbfs.c
threads_posix.c
)
list(APPEND LIBUSB_LIBRARIES rt)
endif()
endif()
if (NOT PLATFORM_SRC)
message(FATAL_ERROR "Unsupported platform ${CMAKE_SYSTEM_NAME}. Currently only support Windows, OSX, & Linux.")
endif()
# the paths are relative to this directory but used in the parent directory,
# so we have to adjust the paths
foreach(SRC IN LISTS PLATFORM_SRC)
list(APPEND LIBUSB_PLATFORM ${CMAKE_CURRENT_SOURCE_DIR}/${SRC})
endforeach()
# export one level up so that the generic
# libusb parts know what the platform bits are supposed to be
set(LIBUSB_PLATFORM ${LIBUSB_PLATFORM} PARENT_SCOPE)
set(LIBUSB_LIBRARIES ${LIBUSB_LIBRARIES} PARENT_SCOPE)
if (WITHOUT_PTHREADS)
set(PTHREADS_ENABLED FALSE)
endif()
set(THREADS_POSIX ${PTHREADS_ENABLED} CACHE INTERNAL "use pthreads" FORCE)
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