https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118564
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- The compiler knows that cortex-m4 has DSP instructions. You don't need to add +dsp to enable them as -mcpu=cortex-m4 will do that automatically.