https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106187
--- Comment #19 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- Hmm, I'm not sure that makes sense to me. AFAICT highway requires an Arm CPU with Neon, but the default compiler flags that you posted (-mthumb -march=armv7-a+fp) does not provide that.
