Is fast-math supported with juce?

[pflugshaupt]

There is a related problem that I’d like to bring up here again: If -ffast-math or -Ofast are used and inf/nan detection no longer works (with recent versions of XCode), a plugin can no longer detect inf/nan on incoming audio streams using the usual functions like fpclassify/isnan/isinf.

Hand-rolled variants need to be used in order to guard against invalid values that might come from previous plugins, loaded sample files or even the hosts.

Here’s the previous thread about this issue:

Std::isinf vs Xcode 14.1/14.2 -Ofast

Today I came across a strange problem on my secondary machine running Ventura/Xcode 14. In my dsp code I use infinite double values to mark analogue poles/zeros placed at infinity. Other parts of the code check this using std::isinf(double). During performance testing I ramped up the optimisation settings to -Ofast, which includes -ffast-math and a bunch of other math stuff - including not caring too much about nan and inf values in math routines. So far (on older versions of Xcode) this has n…