Follow-up Comment #9, sr #110360 (project autoconf): I looked over spinhawk/configure.ac and I can now say with confidence that you shouldn't override $host_cpu. "armv7l" is *not* incorrect, just not recognized as a -march= argument by GCC; changing it to start with "cortex" will cause a whole bunch of "case $host_cpu in" blocks later in the configure script to make the wrong choice.
I think the *proper* fix is for the code that sets $hc_cv_optimization_flags (e.g. https://github.com/rbowler/spinhawk/blob/master/configure.ac#L1909)... case "$host_cpu-$GCC" in ... xscale-yes|arm*-yes) hc_cv_is_intel_x86_arch=no hc_cv_optimization_flags="$hc_cv_optimization_flags -mcpu=$host_cpu -mtune=$host_cpu -frename-registers" ;; to become aware that the value of $host_cpu is *not* necessarily usable as the argument to either -mcpu= or -mtune=. What I would recommend is for this entire mess to be replaced with `-O2 -march=native -mtune=native` in native compilation. Cross compilation could continue to use $host_cpu as the default, but a command-line option should be added (using AC_ARG_WITH) that lets people set it to whatever specific thing they want. I think this is not a bug in autoconf or automake, and should be re-filed as a bug on spinhawk. Viktor, it's probably best if you do that, but feel free to cc: me on it (my Github handle is @zackw). _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/support/?110360> _______________________________________________ Message sent via Savannah https://savannah.gnu.org/