使用gcc编译文件时链接fftw-3.3.6-pl2

Question

I'm trying to run a simple code that includes the fftw library. I know the code is right as it is provided as a test code by the authors. This is what I typed during compilation:

gcc my file.c  -L/home/ankit/Desktop/fftw-3.3.6-pl2/lib/ 
-I/home/ankit/Desktop/fftw-3.3.6-pl2/include/  -lfftw  -lm

I get the errors:

myfile.c: (.Text+0x2c):. undefined reference to 'fftw_plan_dft_2d' collect2: ld returned 1 exit status

Answer 1

It wasn't a linking problem, installation was faulty and I had to use 'sudo make install' to get the permission for the installation to be successful. I could link it with 'gcc test.c -lfftw3 -lm' after. Thanks for your suggestions!