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kbuild: clarify "make C=" build option

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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 commit is contained in:
Robert P. J. Day 2006-09-13 07:57:50 -04:00 committed by Sam Ravnborg
parent e41217129c
commit 1c7bafe720
2 changed files with 13 additions and 7 deletions
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8
Documentation/sparse.txt
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@ -69,10 +69,10 @@ 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 CF can be used to pass arguments to sparse. The The optional make variable CHECKFLAGS can be used to pass arguments to sparse.
build system passes -Wbitwise to sparse automatically. To perform endianness The build system passes -Wbitwise to sparse automatically. To perform
checks, you may define __CHECK_ENDIAN__: endianness checks, you may define __CHECK_ENDIAN__:
make C=2 CF="-D__CHECK_ENDIAN__" make C=2 CHECKFLAGS="-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.

12
Makefile
View file

@ -41,9 +41,15 @@ ifndef KBUILD_VERBOSE
KBUILD_VERBOSE = 0 KBUILD_VERBOSE = 0
endif endif
# Call checker as part of compilation of C files # Call a source code checker (by default, "sparse") as part of the
# Use 'make C=1' to enable checking (sparse, by default) # C compilation.
# Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....' #
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
# See the file "Documentation/sparse.txt" for more details, including
# where to get the "sparse" utility.
ifdef C ifdef C
ifeq ("$(origin C)", "command line") ifeq ("$(origin C)", "command line")