2017-06-13 18:52 GMT+09:00 Cao jin <caoj.fnst@xxxxxxxxxxxxxx>: > Yamada-san, > > I have a question on the current top level Makefile. There are > following lines, I have trouble to understand "firstword x$(MAKEFLAGS)" > in 2nd line, why there is a 'x' there? > > > ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4 > ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),) I do not understand the 'x' either. Michal suggested the code according to the following: https://patchwork.kernel.org/patch/3291301/ (I hope Michal can help you.) My first guess was, it was added just in case $(MAKEFLAGS) is empty. Actually $(firstword ) seems to work with empty argument, though. -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
