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From: Roland Dreier <roland@topspin.com>
Date: Mon, 17 Jan 2005 08:33:48 -0800
In-Reply-To: <20050117154626.GA16111@mars.ravnborg.org> (Sam Ravnborg's
 message of "Mon, 17 Jan 2005 16:46:26 +0100")
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Subject: Re: sparse refuses to work due to stdarg.h
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    Sam> You seems to have a symlink? to /usr/include/asm in your
    Sam> 3.3.5/include directory.

No, with debian gcc, /usr/lib/gcc-lib/i486-linux/3.3.5/include/asm/ is
a real directory that includes nothing but posix_types.h.

    Sam> But real issue is search order of include paths in sparse.
    Sam> sparse searches standard system dirs before dir's specified
    Sam> with -I ...  This in contradiction to 'info gcc - see
    Sam> description for -I'.

Looks like you're right.  On Debian, "make C=1 V=1" ends up with:

      sparse -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -nostdinc -isystem /usr/lib/gcc-lib/i486-linux/3.3.5/include -D__i386__ -Wp,-MD,init/.main.o.d -nostdinc -isystem /usr/lib/gcc-lib/i486-linux/3.3.5/include -D__KERNEL__ -Iinclude  -Wall -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -ffreestanding -O2     -fomit-frame-pointer -pipe -msoft-float -mpreferred-stack-boundary=2  -march=i686  -mregparm=3 -Iinclude/asm-i386/mach-default     -DKBUILD_BASENAME=main -DKBUILD_MODNAME=main init/main.c ;
    /usr/lib/gcc-lib/i486-linux/3.3.5/include/asm/posix_types.h:29:35: warning: no newline at end of file
    /usr/lib/gcc-lib/i486-linux/3.3.5/include/asm/posix_types.h:13:11: error: unable to open 'features.h'

so sparse is picking up the posix_types.h from the -isystem path
instead of the -I path as it should.

 - Roland

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