Re: How to do -nostdinc?

From: Steffen Persvold (
Date: Sun Dec 15 2002 - 19:17:30 EST

On Sun, 15 Dec 2002, Keith Owens wrote:

> There are two ways of setting the -nostdinc flag in the kernel Makefile :-
> (1) -nostdinc $(shell $(CC) -print-search-dirs | sed -ne 's/install: \(.*\)/-I \1include/gp')
> (2) -nostdinc -iwithprefix include
> The first format breaks with non-English locales, however the fix is trivial.
> (1a) -nostdinc $(shell LANG=C $(CC) -print-search-dirs | sed -ne 's/install: \(.*\)/-I \1include/gp')
> The second format is simpler but there have been reports that it does
> not work with some versions of gcc. I have been unable to find a
> definitive statement about which versions of gcc fail and whether the
> problem has been fixed. Anybody care to provide a definitive
> statement?
> If kernel build cannot rely on gcc working with -nostdinc -iwithprefix include
> then we need to convert to (1a).

Well, it works fine with gcc-2.91.66 (egcs-1.1.2 release), gcc-2.96 (RH
7.{1,2,3} versions), and gcc-3.2 (RH 8.0 version)

Of course there are other versions out there but 2.91 is rather old...


  Steffen Persvold   |       Scali AS |
Tel: (+47) 2262 8950 |   Olaf Helsets vei 6
Fax: (+47) 2262 8951 |   N0621 Oslo, NORWAY

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