On Wednesday 08 Sep 2010 8:24:17 am Guus Ellenkamp wrote:
> Hi,
>
> Thanks for your reply.
>
> I am trying to use the version that comes with my package. I'm using Ubuntu
> and just installed 'libfprint-dev'. Tried the IDE and now tried just using a
> makefile.
>
> Errors I get are 'undefined reference to fp_init(), fp_discover_devs() and
> fp_dscv_free(fp_dscv_dev**). The code compiles ok.
>
> My makefile is:
>
> all: test
>
> test: test.o devicehandling.o
> g++ test.o devicehandling.o -lfprint -o test
>
> test.o: test.c
> g++ -c test.c
>
> devicehandling.o: devicehandling.c
> g++ -c devicehandling.c
>
> clean:
> rm -rf *o hello
>
> I am familiar with programming, mostly using IDE, but not with using
> makefiles and shared libraries and not with Linux.
>
Don't use g++ (the C++ front-end) - it's trying to do name-mangling.
The fprint.h file doesn't have C++ guards like:
#ifdef __cplusplus
extern "C" {
#endif
....
....
#ifdef __cplusplus
}
#endif
Check this for more information on how to mix C++ and C code:
http://www.parashift.com/c++-faq-lite/mixing-c-and-cpp.html
Kunal
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