On Sun, 7 Sep 2025, H.J. Lu wrote: > But the default Solaris tail doesn't support "tail -n +4". Add > ACX_PROG_GNU_TAIL to use GNU tail for 'objdump -Wi' test. POSIX has had it from time immemorial. Don't you just need to request a POSIX `tail' implementation on Solaris instead (via $PATH or otherwise)? Maciej