Build: gusbamp Linux API can now be found by the cmake find script

cmake-modules/FindThirdPartyGUSBampCAPI.cmake

@@ -38,3 +38,21 @@ IF(WIN32)
 		MESSAGE(STATUS "  FAILED to find gUSBampCAPI")
 	ENDIF(PATH_GUSBampCAPI)
 ENDIF(WIN32)
+
+
+IF(UNIX)
+	# To try other versions of the gtec's library, change the number below
+	SET(CMAKE_FIND_LIBRARY_SUFFIXES ".so.1.14")
+	FIND_LIBRARY(gUSBAmpLinux_LIBRARY NAMES "gusbampapi" PATHS "/usr/lib" "/usr/local/lib")
+	IF(gUSBAmpLinux_LIBRARY)
+		MESSAGE(STATUS "  Found GUSBAmpAPILinux...")
+		MESSAGE(STATUS "    [  OK  ] Third party lib ${gUSBAmpLinux_LIBRARY}")
+		ADD_DEFINITIONS(-DTARGET_HAS_ThirdPartyGUSBampCAPI_Linux)
+		TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${gUSBAmpLinux_LIBRARY} )
+	ELSE(gUSBAmpLinux_LIBRARY)
+		MESSAGE(STATUS "  FAILED to find GUSBAmpAPI Linux... ")
+		MESSAGE(STATUS "   : If it should be found, see that 'libgusbampapi.so.1.14' link exists on the fs, with no further nemeric suffixes in the filename.")
+		MESSAGE(STATUS "   : e.g. do 'cd /usr/lib/ ; ln -s libgusbampapi.so.1.14'. See gtec-bcilab/README for details.")
+	ENDIF(gUSBAmpLinux_LIBRARY)
+		SET(OV_ThirdPartyGUSBAmp "YES")
+ENDIF(UNIX)