Hi,

apparently #include <math.h> is only needed for the declaration of pow(2,22) used in rtlsdr_set_sample_rate(). Now gcc is smart enough to convert pow(2,22) to a constant, but for example clang isn't, and it complains about the missing math library.

Attached patches replace pow(2,22) by (float)1<<22 and remove the math headers.

Chris

[tort /home/chris/rtl-sdr (b345963947b451f6…)] $ make (...) ./.libs/librtlsdr.so: undefined reference to `exp2' collect2: ld returned 1 exit status clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [rtl_sdr] Error 1 make[2]: Leaving directory `/home/chris/rtl-sdr/src'