Recognize macOS 11 and later and simplify. https://debbugs.gnu.org/cgi/bugreport.cgi?bug=44605 --- configure.orig 2009-03-03 17:38:38.000000000 -0600 +++ configure 2024-01-30 17:41:56.000000000 -0600 @@ -9554,15 +9554,10 @@ darwin1.*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; darwin*) - # 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]*) + 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 ${wl}dynamic_lookup' ;; esac ;; @@ -10717,18 +10712,14 @@ allow_undefined_flag='${wl}-undefined ${wl}suppress' ;; *) # Darwin 1.3 on - if test -z ${MACOSX_DEPLOYMENT_TARGET} ; then - allow_undefined_flag='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' - else - case ${MACOSX_DEPLOYMENT_TARGET} in - 10.[012]) + case $MACOSX_DEPLOYMENT_TARGET,$host in + 10.[012],*|,*powerpc*-darwin[5-8]*) allow_undefined_flag='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - 10.*) + *) allow_undefined_flag='${wl}-undefined ${wl}dynamic_lookup' ;; esac - fi ;; esac archive_cmds_need_lc=no @@ -17397,18 +17388,14 @@ allow_undefined_flag_F77='${wl}-undefined ${wl}suppress' ;; *) # Darwin 1.3 on - if test -z ${MACOSX_DEPLOYMENT_TARGET} ; then - allow_undefined_flag_F77='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' - else - case ${MACOSX_DEPLOYMENT_TARGET} in - 10.[012]) + case $MACOSX_DEPLOYMENT_TARGET,$host in + 10.[012],*|,*powerpc*-darwin[5-8]*) allow_undefined_flag_F77='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - 10.*) + *) allow_undefined_flag_F77='${wl}-undefined ${wl}dynamic_lookup' ;; esac - fi ;; esac archive_cmds_need_lc_F77=no @@ -20026,18 +20013,14 @@ allow_undefined_flag_GCJ='${wl}-undefined ${wl}suppress' ;; *) # Darwin 1.3 on - if test -z ${MACOSX_DEPLOYMENT_TARGET} ; then - allow_undefined_flag_GCJ='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' - else - case ${MACOSX_DEPLOYMENT_TARGET} in - 10.[012]) + case $MACOSX_DEPLOYMENT_TARGET,$host in + 10.[012],*|,*powerpc*-darwin[5-8]*) allow_undefined_flag_GCJ='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; - 10.*) + *) allow_undefined_flag_GCJ='${wl}-undefined ${wl}dynamic_lookup' ;; esac - fi ;; esac archive_cmds_need_lc_GCJ=no