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Subject[PATCH 17/24] kbuild: sparse needs CF not CHECKFLAGS
Date
From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>

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 1c7bafe7206d928eaccbcbd08d868733e0fb7054
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 7b49bb9aff8b14d15da58111d8908c877c0a525e
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>
---
Documentation/sparse.txt | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/sparse.txt b/Documentation/sparse.txt
index 1a3bdc2..42f43fa 100644
--- a/Documentation/sparse.txt
+++ b/Documentation/sparse.txt
@@ -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
have already built it.

-The optional make variable CHECKFLAGS can be used to pass arguments to sparse.
-The build system passes -Wbitwise to sparse automatically. To perform
-endianness checks, you may define __CHECK_ENDIAN__:
+The optional make variable CF can be used to pass arguments to sparse. The
+build system passes -Wbitwise to sparse automatically. To perform endianness
+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.
--
1.5.6.1.93.gef98


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