added Dependencies and notes on benchmark in README
Signed-off-by: hayati ayguen <h_ayguen@web.de>
(cherry picked from commit fa091519b60fcdeedcc835585fd3335120fd88ff)
diff --git a/README.md b/README.md
index db318a0..7b25e9a 100644
--- a/README.md
+++ b/README.md
@@ -124,6 +124,22 @@
The whole C++ implementation file is 161 lines, including the Copyright header, see
[https://github.com/nayuki/Nayuki-web-published-code/blob/master/free-small-fft-in-multiple-languages/FftComplex.cpp](https://github.com/nayuki/Nayuki-web-published-code/blob/master/free-small-fft-in-multiple-languages/FftComplex.cpp)
+## Dependencies / Required Linux packages
+
+On Debian/Ubuntu Linux following packages should be installed:
+
+```
+sudo apt-get install build-essential gcc g++ cmake
+```
+
+for benchmarking, you should have additional packages:
+```
+sudo apt-get install libfftw3-dev gnuplot
+```
+
+run the benchmarks with `./bench_all.sh ON` , to include benchmarks of fftw3 ..
+more details in README of [https://github.com/hayguen/pffft_benchmarks](https://github.com/hayguen/pffft_benchmarks)
+
## Benchmark results
