std::sqrt no member named sqrtf

[ElandaOfficial]

The function std::sqrtf is not available by default in GCC, it requires you to add the -lm flag to the compiler which may damage portability.

Can be found in file ff_meters_LevelMeterSource.h:105 (LevelMeterSource::ChannelData::getAvgRMS())

Edit: Removing std seems to fix the problem

[ElandaOfficial]

Reopening this issue as I still cannot build this on GCC as sqrtf is still not in the standard.

[ffAudio]

The module header adds the -lm to a linux build, see
https://github.com/ffAudio/ff_meters/blob/master/ff_meters.h#L39

Doesn't this solve the issue?
I am not sure, if falling back to the C sqrt is the right solution...

[ElandaOfficial]

According to different sources this is a bug in GCC rather than a missing linker target.
They have not yet implemented this in the std namespace and thus only the C version seems to work.