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Re: [PATCH 1/5] obstack tidy

From: Roland McGrath
Subject: Re: [PATCH 1/5] obstack tidy
Date: Mon, 28 Jul 2014 12:31:00 -0700 (PDT)

> a) Delete nonsense about "not polluting the namespace with stddef.h
> symbols" since string.h includes stddef.h a little later anyway.

If you are talking specifically about the glibc implementation's string.h,
then you are confused.  glibc's string.h complies with the C and POSIX
standards, and so does not pollute the namespace with all of stddef.h's
names.  It only defines size_t and NULL via stddef.h.  If you also want
ptrdiff_t for use in obstack.h, with GCC's stddef.h you can do:
        #define __need_ptrdiff_t
        #include <stddef.h>

That said, I don't think anybody actually cares about a GNU extension
header like obstack.h implicitly defining common standard C symbols like
that ones that stddef.h defines.

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