On Sun, Aug 01, 2021 at 11:13:36PM +0300, Alexey Dobriyan wrote: > In theory, it enables "leakage" of userspace headers into kernel which > may present licensing problem. > -NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) > +NOSTDINC_FLAGS += -nostdinc This is removing the compiler's own include files. These are required for all kinds of basic features, and required to be compliant to the C standard at all. These are not "userspace headers", that is what -nostdinc takes care of already. In the case of GCC all these headers are GPL-with-runtime-exception, so claiming this can cause licensing problems is fearmongering. I strongly advise against doing this. Segher
