Issue with simple Makefile: undefined reference to symbol 'cos@@GLIBC_2.2.5'

Question

I\'m trying to compìle some test C code using a Makefile. The main.c file includes two headers:

#include \"circle_buffer.h\"
#include \"window.h\"
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Answer 1

Sounds like the math library, libm needs to be linked in. Add -lm to the linking stage.

 LIBS=-L/usr/lib/x86_64-linux-gnu -lsndfile -lm