Don't accidentally create flat-namespace dylibs on Yosemite (#44596). --- configure.orig 2017-01-18 05:41:35.000000000 -0600 +++ configure 2017-02-09 09:13:02.000000000 -0600 @@ -8361,7 +8361,7 @@ case ${MACOSX_DEPLOYMENT_TARGET-10.0},$host in 10.0,*86*-darwin8*|10.0,*-darwin[91]*) _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;; - 10.[012]*) + 10.[012][,.]*) _lt_dar_allow_undefined='${wl}-flat_namespace ${wl}-undefined ${wl}suppress' ;; 10.*) _lt_dar_allow_undefined='${wl}-undefined ${wl}dynamic_lookup' ;;