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Hi Welson, are you saying that the .o file containing the class is being linked into the .so file, but nonetheless you get "undefined symbol XYZ" errors where XYZ is that class? Maybe you defined the class inside an anonymous name space? Alternatively, if XYZ refers to a method of the class, maybe you forgot to define that method. Ciao, Duncan. On 01/03/12 17:36, Welson Sun wrote:

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Originally, the problem is the lack of .cpp file. Then I noticed the compilation log is not showing the .o file being generated for the non-pass classes. Then I added the .cpp files for each .h file, then the .o files are being generated, shown in the Debug directory. Actually, if I add "VERBOSE = 1" in the Makefile, it shows the linking command is actually linking all the .o files into