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kbuild: sparse needs CF not CHECKFLAGS 

Documentation/sparse.txt tells to use:

    make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__"

However, this still doesn't enable endian checks. The correct syntax is:

    make C=2 CF="-D__CHECK_ENDIAN__"

This documentation bug was introduced by the following commit:

    commit 1c7bafe720
    Author: Robert P. J. Day <rpjday@mindspring.com>
    Date:   Wed Sep 13 07:57:50 2006 -0400

	kbuild: clarify "make C=" build option

	Clarify the use of "make C=" in the top-level Makefile, and fix a
	typo in the Documentation file.

	Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

This `typo' was not a typo, as `CF' had been introduced much earlier, by:

    commit 7b49bb9aff
    Author: viro@ZenIV.linux.org.uk <viro@ZenIV.linux.org.uk>
    Date:   Fri Sep 9 21:14:35 2005 +0100

	[PATCH] kbuild: CF=<arguments> passes arguments to sparse

	Allows to add to sparse arguments without mutilating makefiles - just
	pass CF=<arguments> and they will be added to CHECKFLAGS.

    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Geert Uytterhoeven 2008-06-20 15:45:12 +02:00 committed by Sam Ravnborg
parent 74fc5c653c
commit a887a07d51
1 changed files with 4 additions and 4 deletions
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8
Documentation/sparse.txt
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@ -73,10 +73,10 @@ recompiled, or use "make C=2" to run sparse on the files whether they need to
be recompiled or not. The latter is a fast way to check the whole tree if you be recompiled or not. The latter is a fast way to check the whole tree if you
have already built it. have already built it.
The optional make variable CHECKFLAGS can be used to pass arguments to sparse. The optional make variable CF can be used to pass arguments to sparse. The
The build system passes -Wbitwise to sparse automatically. To perform build system passes -Wbitwise to sparse automatically. To perform endianness
endianness checks, you may define __CHECK_ENDIAN__: checks, you may define __CHECK_ENDIAN__:
make C=2 CHECKFLAGS="-D__CHECK_ENDIAN__" make C=2 CF="-D__CHECK_ENDIAN__"
These checks are disabled by default as they generate a host of warnings. These checks are disabled by default as they generate a host of warnings.