remove -prebind on macOS?

[Robert Pluim]

Every time I build on macos I get a warning about the '-prebind' option
passed to LD. As far as I can tell, that option has been obsolete and
without effect since macOS 10.3. Can we remove it yet?

Robert

diff --git i/configure.ac w/configure.ac
index 7529719429..16491a95d5 100644
--- i/configure.ac
+++ w/configure.ac
@@ -5395,7 +5395,7 @@ AC_DEFUN
    else
      libs_nsgui=
    fi
-   LD_SWITCH_SYSTEM_TEMACS="-fno-pie -prebind $libs_nsgui -Xlinker -headerpad 
-Xlinker $headerpad_extra"
+   LD_SWITCH_SYSTEM_TEMACS="-fno-pie $libs_nsgui -Xlinker -headerpad -Xlinker 
$headerpad_extra"
 
    ## This is here because src/Makefile.in did some extra fiddling around
    ## with LD_SWITCH_SYSTEM.  It seems cleaner to put this in