In order to encourage people to notice when they break the exported
headers, add a config option which automatically runs the sanity checks
when building vmlinux. That way, those who use allyesconfig will notice
failures.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Not all architectures have a file named 'defconfig' (e.g. powerpc).
However the make TAGS and make tags targets search such files for tags,
causing an error message when they don't exist. This patch addresses the
problem by instructing xargs not to run the tags program if there are no
matching files.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Make checkstack work for UML. We need to pass the underlying architecture
name, rather than "um" to checkstack.pl.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* git://git.infradead.org/~dwmw2/khdrs-2.6:
New 'make headers_install_all' target.
Use dependencies for 'make headers_install'.
[S390] Unexport <asm/z90crypt.h>, export <asm/zcrypt.h> in its place.
Remove dead netfilter_logging.h from include/linux/Kbuild
Remove offsetof() from user-visible <linux/stddef.h>
Clean up exported headers on CRIS
Fix v850 exported headers
Don't advertise (or allow) headers_{install,check} where inappropriate.
Remove UML header export
Remove ARM26 header export.
Fix H8300 exported headers.
Fix m68knommu exported headers
Fix exported headers for SPARC, SPARC64
Fix 'make headers_check' on m32r
Fix 'make headers_check' on sh64
Fix 'make headers_check' on sh
[HEADERS] Fix ARM 'make headers_check'
Initial pass of manual conflict resolution in top-level Makefile over
conflicting build rule and headers_install changes.
Add distclean info, that was previously missing, to 'make help'.
Also add a few more details to the 'make clean' help text.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
The attached patch clarifies the creation of KERNELRELEASE and
corrects an error regarding the use of $(LOCALVERSION).
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
The following patch extends kbuild/defconfig tags support to exuberant
ctags. The previous support is only for emacs ctags/etags programs.
This patch also corrects the kconfig regex for the emacs invocation.
Previously it would miss some instances because it assumed /^config
instead of /^[ \t]*config
Signed-off-by: Aron Griffis <aron@hp.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
tell why a a target got build
enabled by make V=2
Output (listed in the order they are checked):
(1) - due to target is PHONY
(2) - due to target missing
(3) - due to: file1.h file2.h
(4) - due to command line change
(5) - due to missing .cmd file
(6) - due to target not in $(targets)
(1) We always build PHONY targets
(2) No target, so we better build it
(3) Prerequisite is newer than target
(4) The command line stored in the file named dir/.target.cmd
differed from actual command line. This happens when compiler
options changes
(5) No dir/.target.cmd file (used to store command line)
(6) No dir/.target.cmd file and target not listed in $(targets)
This is a good hint that there is a bug in the kbuild file
This patch is inspired by a patch from: Milton Miller <miltonm@bga.com>
Cc: Milton Miller <miltonm@bga.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Based on patch from: Magnus Damm <magnus@valinux.co.jp>
This has the advantage that all section mismatch checks are run regardless
of modules being enabled or not.
When running modpost on vmlinux output:
MODPOST vmlinux
When running modpost on modules output count of modules like this:
MODPOST 5 modules
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Install headers for _all_ architectures, suitable for making a tarball
release or extracting them for use in a separate package.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Re-export header files only if either they or their controlling Kbuild
file has actually changed. Also allow for similar dependencies with
'headers_check', once we properly create the dependencies for those.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
`make headers_check' wants to go and write stuff in /lib/modules, which
requires root, whic is unfortunate.
In fact, there's no _particular_ reason for headers_install to put it there
either -- it can go into a subdirectory of the build tree in both cases.
It's not intended to go directly into /usr/include, which is why we didn't
put it there -- and we certainly don't want people screwing around with
symlinking to it. It's for distributors to take away and do stuff with, so
leaving it in $(objtree) is fine, even in the headers_install case.
I picked $(objtree)/usr/include but I have no _particular_ preference
for that; it just seemed reasonable.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Some architectures change $CC in arch/$(ARCH)/Makefile
mips is one example.
That have impact on what options are supported by gcc so move all
$(call cc-option, ...) after include of arch specific Makefile.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
external modules needs include/linux/autoconf.h and include/config/auto.conf
but skip the integrity test of these. Even with a newer Kconfig file we
shall just proceed since external modules simply uses the kernel source and
shall not attempt to modify it.
Error out if a config fiel is missing since they are mandatory.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Ubuntu gcc has hardcoded -fstack-protector - but does not understand
-fno-stack-protector-all. So only try -fno-stack-protector.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
include/linux/version.h contained both actual KERNEL version
and UTS_RELEASE that contains a subset from git SHA1 for when
kernel was compiled as part of a git repository.
This had the unfortunate side-effect that all files including version.h
would be recompiled when some git changes was made due to changes SHA1.
Split it out so we keep independent parts in separate files.
Also update checkversion.pl script to no longer check for UTS_RELEASE.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Ubuntu has enabled -fstack-protector per default in gcc
breaking kernel build. Explicit turn it off for now.
Later we may decide to make it configurable if the
kernel starts to support it.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Minor documentation change on allowing checkers besides sparse
This patch cleans up a couple of mentions of sparse in the inline
toplevel Makefile documentation such that it's clear that other checkers
besides sparse can override CHECK and CHECKFLAGS.
Signed-off-by: Dustin Kirkland <dustin.kirkland@us.ibm.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
kbuild used $¤(*F to get filename of target without extension.
This was used in several places all over kbuild, but introducing
make -rR broke his for all cases where we specified full path to
target/prerequsite. It is assumed that make -rR disables old style
suffix-rules which is why is suddenly failed.
ia64 was impacted by this change because several div* routines in
arch/ia64/lib are build using explicit paths and then kbuild failed.
Thanks to David Mosberger-Tang <David.Mosberger@acm.org> for an explanation
what was the root-cause and for testing on ia64.
This patch also fixes two uses of $(*F) in arch/um
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (40 commits)
kbuild: trivial fixes in Makefile
kbuild: adding symbols in Kconfig and defconfig to TAGS
kbuild: replace abort() with exit(1)
kbuild: support for %.symtypes files
kbuild: fix silentoldconfig recursion
kbuild: add option for stripping modules while installing them
kbuild: kill some false positives from modpost
kbuild: export-symbol usage report generator
kbuild: fix make -rR breakage
kbuild: append -dirty for updated but uncommited changes
kbuild: append git revision for all untagged commits
kbuild: fix module.symvers parsing in modpost
kbuild: ignore make's built-in rules & variables
kbuild: bugfix with initramfs
kbuild: modpost build fix
kbuild: check license compatibility when building modules
kbuild: export-type enhancement to modpost.c
kbuild: add dependency on kernel.release to the package targets
kbuild: `make kernelrelease' speedup
kconfig: KCONFIG_OVERWRITECONFIG
...
I'm using TAGS generated from "make TAGS" to read the kernel source code.
When I met a ifdef block
#ifdef CONFIG_FOO
...
#endif
in the soruce code I would like to know the meaning CONFIG_FOO
to decide whether I should read inside the ifdef block
or not. meaning CONFIG_FOO is well documented in Kconfig.
So it is nice if I can jump to CONFIG_FOO entry in Kconfig
from "#ifdef CONFIG_FOO" with the tag jump.
Here is the patch to add symbols in Kconfig and defconfig to TAGS
in "make TAGS" operation.
Signed-off-by: Masatake YAMATO <jet@gyve.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Here is a patch that adds a new -T option to genksyms for generating dumps of
the type definition that makes up the symbol version hashes. This allows to
trace modversion changes back to what caused them. The dump format is the
name of the type defined, followed by its definition (which is almost C):
s#list_head struct list_head { s#list_head * next , * prev ; }
The s#, u#, e#, and t# prefixes stand for struct, union, enum, and typedef.
The exported symbols do not define types, and thus do not have an x# prefix:
nfs4_acl_get_whotype int nfs4_acl_get_whotype ( char * , t#u32 )
The symbol type defintion of a single file can be generated with:
make fs/jbd/journal.symtypes
If KBUILD_SYMTYPES is defined, all the *.symtypes of all object files that
export symbols are generated.
The single *.symtypes files can be combined into a single file after a kernel
build with a script like the following:
for f in $(find -name '*.symtypes' | sort); do
f=${f#./}
echo "/* ${f%.symtypes}.o */"
cat $f
echo
done \
| sed -e '\:UNKNOWN:d' \
-e 's:[,;] }:}:g' \
-e 's:\([[({]\) :\1:g' \
-e 's: \([])},;]\):\1:g' \
-e 's: $::' \
$f \
| awk '
/^.#/ { if (defined[$1] == $0) {
print $1
next
}
defined[$1] = $0
}
{ print }
'
When the kernel ABI changes, diffing individual *.symtype files, or the
combined files, against each other will show which symbol changes caused the
ABI changes. This can save a tremendous amount of time.
Dump the types that make up modversions
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
kconfig-fix-config-dependencies causes this:
make CC=cc KBUILD_VERBOSE=1 -C /usr/src/25 SUBDIRS=/home/akpm/NVIDIA-Linux-x86_64-1.0-8762-pkg2/usr/src/nv modules
make -f /usr/src/devel/Makefile silentoldconfig
make -f /usr/src/devel/Makefile silentoldconfig
make -f /usr/src/devel/Makefile silentoldconfig
The basic problem is if we compile external modules, config-targets isn't
set which can cause recursive calls to silentoldconfig to update the
kernel configuration.
Bail out and ask the user to update manually.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Add option for stripping modules while installing them.
This function adds support for stripping modules while they are being
installed. CONFIG_DEBUG_KERNEL (which will probably become more
popular as developers use kdump) causes the size of the installed
modules to grow by a factor of 9 or so.
Some kernel package systems solve this problem by stripping the debug
information from /lib/modules after running "make modules_install",
but that may not work for people who are installing directly into
/lib/modules --- root partitions that were sized to handle 16 megs
worth of modules may not be quite so happy with 145 megs of modules,
so the "make modules_install" never succeeds.
This patch allows such users to request modules_install to strip the
modules as they are installed.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Based on the 'headers_install' target, this performs a basic sanity check
on the exported headers -- so far only checking that they do not include
any other headers which aren't selected for import, but easily extendable.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This adds a make target which exports a subset of headers which contain
definitions which are useful for system libraries and tools. It uses the
BSD 'unifdef' tool to remove instances of #ifdef __KERNEL__, and uses
sed to remove markers like __user.
Based on an original implementation by Arnd Bergmann <arnd@arndb.de>
Hacked about by David Woodhouse <dwmw2@infradead.org>
Reviewed and cleaned up by Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
