Externals: add hidapi

Current master (d17db57b9d4354752e0af42f5f33007a42ef2906) because
Android support was added after the current release (0.8.0-rc1).

Externals/hidapi/testgui/Makefile.am

@@ -0,0 +1,43 @@
+
+AM_CPPFLAGS = -I$(top_srcdir)/hidapi/ $(CFLAGS_TESTGUI)
+
+if OS_LINUX
+## Linux
+bin_PROGRAMS = hidapi-hidraw-testgui hidapi-libusb-testgui
+
+hidapi_hidraw_testgui_SOURCES = test.cpp
+hidapi_hidraw_testgui_LDADD = $(top_builddir)/linux/libhidapi-hidraw.la $(LIBS_TESTGUI)
+
+hidapi_libusb_testgui_SOURCES = test.cpp
+hidapi_libusb_testgui_LDADD = $(top_builddir)/libusb/libhidapi-libusb.la $(LIBS_TESTGUI)
+else
+## Other OS's
+bin_PROGRAMS = hidapi-testgui
+
+hidapi_testgui_SOURCES = test.cpp
+hidapi_testgui_LDADD = $(top_builddir)/$(backend)/libhidapi.la $(LIBS_TESTGUI)
+endif
+
+if OS_DARWIN
+hidapi_testgui_SOURCES = test.cpp mac_support_cocoa.m mac_support.h
+# Rules for copying the binary and its dependencies into the app bundle.
+TestGUI.app/Contents/MacOS/hidapi-testgui$(EXEEXT): hidapi-testgui$(EXEEXT)
+	$(srcdir)/copy_to_bundle.sh
+
+all: all-am TestGUI.app/Contents/MacOS/hidapi-testgui$(EXEEXT)
+
+endif
+
+EXTRA_DIST = \
+ copy_to_bundle.sh \
+ Makefile-manual \
+ Makefile.freebsd \
+ Makefile.linux \
+ Makefile.mac \
+ Makefile.mingw \
+ TestGUI.app.in \
+ testgui.sln \
+ testgui.vcproj
+
+distclean-local:
+	rm -rf TestGUI.app