1.fftw
http://www.fftw.org/download.html
how to install
make clean
./configure --enable-shared
make
sudo make install
sudo ln -s /usr/lib/x86_64-linux-gnu/libfftw3_omp.so.3 /usr/lib/libfftw3_omp.so
sudo ln -s /usr/lib/x86_64-linux-gnu/libfftw3.so.3 /usr/lib/libfftw3.so
add flag ./configure --enable-shared for bug /usr/bin/ld: /usr/local/lib/libfftw3f.a(mapflags.o): relocation R_X86_64_32 against `.rodata' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libfftw3f.a: error adding symbols: Bad value
- fftw++ , c++ api for fftw