Externals: add hidapi

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

Externals/hidapi/libusb/Makefile.linux

@@ -0,0 +1,49 @@
+###########################################
+# Simple Makefile for HIDAPI test program
+#
+# Alan Ott
+# Signal 11 Software
+# 2010-06-01
+###########################################
+
+all: hidtest-libusb libs
+
+libs: libhidapi-libusb.so
+
+CC       ?= gcc
+CFLAGS   ?= -Wall -g -fpic
+
+CXX      ?= g++
+CXXFLAGS ?= -Wall -g -fpic
+
+LDFLAGS  ?= -Wall -g
+
+COBJS_LIBUSB = hid.o
+COBJS = $(COBJS_LIBUSB)
+CPPOBJS   = ../hidtest/hidtest.o
+OBJS      = $(COBJS) $(CPPOBJS)
+LIBS_USB  = `pkg-config libusb-1.0 --libs` -lrt -lpthread
+LIBS      = $(LIBS_USB)
+INCLUDES ?= -I../hidapi `pkg-config libusb-1.0 --cflags`
+
+
+# Console Test Program
+hidtest-libusb: $(COBJS_LIBUSB) $(CPPOBJS)
+	$(CXX) $(LDFLAGS) $^ $(LIBS_USB) -o $@
+
+# Shared Libs
+libhidapi-libusb.so: $(COBJS_LIBUSB)
+	$(CC) $(LDFLAGS) $(LIBS_USB) -shared -fpic -Wl,-soname,$@.0 $^ -o $@
+
+# Objects
+$(COBJS): %.o: %.c
+	$(CC) $(CFLAGS) -c $(INCLUDES) $< -o $@
+
+$(CPPOBJS): %.o: %.cpp
+	$(CXX) $(CXXFLAGS) -c $(INCLUDES) $< -o $@
+
+
+clean:
+	rm -f $(OBJS) hidtest-libusb libhidapi-libusb.so ../hidtest/hidtest.o
+
+.PHONY: clean libs