CMake: rework findlibusb module

[libftdi] / cmake / FindLibUSB.cmake

diff --git a/cmake/FindLibUSB.cmake b/cmake/FindLibUSB.cmake
new file mode 100644 (file)
index 0000000..766fc82
--- /dev/null
+++ b/cmake/FindLibUSB.cmake
@@ -0,0 +1,38 @@
+# - 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
+
+# Copyright (c) 2006, 2008  Laurent Montel, <montel@kde.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)
+
+  find_path(LIBUSB_INCLUDE_DIR libusb.h
+    PATH_SUFFIXES libusb-1.0
+    PATHS ${PC_LIBUSB_INCLUDEDIR} ${PC_LIBUSB_INCLUDE_DIRS})
+
+  find_library(LIBUSB_LIBRARIES NAMES usb-1.0
+    PATHS ${PC_LIBUSB_LIBDIR} ${PC_LIBUSB_LIBRARY_DIRS})
+
+  include(FindPackageHandleStandardArgs)
+  find_package_handle_standard_args(
+    LibUSB DEFAULT_MSG LIBUSB_LIBRARIES LIBUSB_INCLUDE_DIR
+  )
+
+  mark_as_advanced(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
+
+endif (LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)