For Snow Leopard, do not pass -framework PCSC to the compiler since that generates warnings: i686-apple-darwin10-gcc-4.2.1: -framework: linker input file unused because linking not done i686-apple-darwin10-gcc-4.2.1: PCSC: linker input file unused because linking not done
For Snow Leopard, do not pass -framework PCSC to the compiler since that
generates warnings:
i686-apple-darwin10-gcc-4.2.1: -framework: linker input file unused because linking not done
i686-apple-darwin10-gcc-4.2.1: PCSC: linker input file unused because linking not done

We do not need to link with -framework PCSC since we do a dynamic
loading using dlopen()

Thanks to Martin Paljak for the patch

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