from Kay Röpke.
p4raw-id: //depot/perl@12364
dlext='bundle';
dlsrc='dl_dyld.xs'; usedl='define';
cccdlflags=' '; # space, not empty, because otherwise we get -fpic
-ldflags="${ldflags} -flat_namespace"
+# ldflag: -flat_namespace is only available since OS X 10.1 (Darwin 1.4.1)
+# - but not in 10.0.x (Darwin 1.3.x)
+# -- Kay Roepke
+case "$osvers" in
+1.[0-3].*) ;;
+*) ldflags="${ldflags} -flat_namespace" ;;
+esac
lddlflags="${ldflags} -bundle -undefined suppress";
ldlibpthname='DYLD_LIBRARY_PATH';
useshrplib='true';