Recognize macOS 11 and later, remove inaccurate comment, and simplify. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=44605 --- configure.orig 2012-11-29 18:28:36.000000000 -0600 +++ configure 2023-07-21 01:16:17.000000000 -0500 @@ -9029,16 +9029,11 @@ _lt_dar_allow_undefined='${wl}-undefined ${wl}suppress' ;; darwin1.*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - darwin*) # darwin 5.x on - # if running on 10.5 or later, the deployment target defaults - # to the OS version, if on x86, and 10.4, the deployment - # target defaults to 10.4. Don't you love it? - case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in - 10.0,*86*-darwin8*|10.0,*-darwin[91]*) - _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; - 10.[012]*) + darwin*) + case ${MACOSX_DEPLOYMENT_TARGET},$host in + 10.[012],*|,*powerpc*-darwin[5-8]*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - 10.*) + *) _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; esac ;;