https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100014
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Version|unknown |11.0 Keywords| |build --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Looks like AC_C_BIGENDIAN tests various macros and falls back to runtime checks which don't work when cross-compiling.