Fix [ad393071c2]: Use different LD_LIBRARY_PATH_VAR on macOS

Author: jan.nijtmans

unix/configure

@@ -7898,7 +7898,7 @@ fi
 
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
-	    LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
+	    LD_LIBRARY_PATH_VAR="DYLD_FALLBACK_LIBRARY_PATH"
 
 cat >>confdefs.h <<\_ACEOF
 #define MAC_OSX_TCL 1

unix/tcl.m4

@@ -1594,7 +1594,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
 	    ])
 	    CC_SEARCH_FLAGS=""
 	    LD_SEARCH_FLAGS=""
-	    LD_LIBRARY_PATH_VAR="DYLD_LIBRARY_PATH"
+	    LD_LIBRARY_PATH_VAR="DYLD_FALLBACK_LIBRARY_PATH"
 	    AC_DEFINE(MAC_OSX_TCL, 1, [Is this a Mac I see before me?])
 	    PLAT_OBJS='${MAC_OSX_OBJS}'
 	    PLAT_SRCS='${MAC_OSX_SRCS}'