Linking to fftw with Xcode -

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i have followed instructions here install fftw3 on mac: http://www.fftw.org/doc/installation-on-unix.html

i'm creating code in c in xcode. once i've installed fftw, how use in xcode? is, how tell xcode fftw exists?

i've tried #include , error stating fftw3.h cannot found.

thank you!


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