Error in Makefile using (ar) utility for Mac.

[snOm3ad]

The Makefile contains the following (on line 72)
$(LIBFILE): $(LIBOBJ) $(AR) -crs $@ -- $^
The command fails on MacOS High Sierra because the ar utility does not recognize the -- as valid syntax. Removing the double dash, solved the issue for me.

[nayuki]

Yeah, I saw the same problem with ar and -- on OpenBSD. But using -- to end the list of flags is supported in many programs (a GNU-ism maybe?), and adds to the robustness against accidental flags.

[IlyaDiallo]

Yeah, I saw the same problem with ar and -- on OpenBSD. But using -- to end the list of flags is supported in many programs (a GNU-ism maybe?), and adds to the robustness against accidental flags.

Is the purpose of the -- solely to "add robustness again accidental flags" (on Linux) ?
If so, is it worth it, considering that it's an invalid syntax on other systems ?