Put corefoundation and iokit separate in ldflags for darwin.
diff --git a/configure.ac b/configure.ac
index e16380b..148eb5e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -331,7 +331,7 @@ if test "x$want_usbutils" != xfalse; then
fi
if test "x$have_darwin" = "xtrue"; then
LIBUSB_LIBS+=" -lobjc"
- LDFLAGS+=" -framework CoreFoundation,IOKit"
+ LDFLAGS+=" -framework CoreFoundation -framework IOKit"
fi
else
LIBUSB_LIBS=""