linux-toradex.git/scripts/basic/fixdep.c, branch v3.15-rc6

kbuild: fixdep: support concatenated dep files

2013-04-05T18:22:58+00:00

The current use-case for fixdep is: a source file is run through a single
processing step, which creates a single dependency file as a side-effect,
which fixdep transforms into the file used by the kernel build process.

In order to transparently run the C pre-processor on device-tree files,
we wish to run both gcc -E and dtc on a source file in a single rule.
This generates two dependency files, which must be transformed together
into the file used by the kernel build process. This change modifies
fixdep so it can process the concatenation of multiple separate input
dependency files, and produce a correct unified output.

The code changes have the slight benefit of transforming the loop in
parse_dep_file() into more of a lexer/tokenizer, with the loop body being
more of a parser. Previously, some of this logic was mixed together
before the loop. I also added some comments, which I hope are useful.

Benchmarking shows that on a cross-compiled ARM tegra_defconfig build,
there is less than 0.5 seconds speed decrease with this change, on top
of a build time of ~2m24s. This is probably within the noise.

Signed-off-by: Stephen Warren 
Acked-by: Rob Herring

treewide: Fix typo in various drivers

2013-01-09T10:43:32+00:00

Correct spelling typo in printk within various drivers.

Signed-off-by: Masanari Iida 
Signed-off-by: Jiri Kosina

fixdep: fix extraneous dependencies

2011-09-09T09:45:47+00:00

The introduction of include/linux/kconfig.h created 3 extraneous
dependencies:
include/config/.h
include/config/h.h
include/config/foo.h

Fix this by excluding kconfig.h from fixdep calculations.

Signed-off-by: Peter Foley 
Signed-off-by: Michal Marek

kbuild: Fix computing srcversion for modules

2011-03-13T22:59:58+00:00

Recent change to fixdep:

    commit b7bd182176960fdd139486cadb9962b39f8a2b50
    Author: Michal Marek 
    Date:   Thu Feb 17 15:13:54 2011 +0100

    fixdep: Do not record dependency on the source file itself

changed the format of the *.cmd files without realizing that it is also
used by modpost. Put the path to the source file to the file back, in a
special variable, so that modpost sees all source files when calculating
srcversion for modules.

Reported-and-tested-by: Henrik Rydberg 
Signed-off-by: Michal Marek 
Signed-off-by: Linus Torvalds

fixdep: Do not record dependency on the source file itself

2011-02-21T12:35:17+00:00

The dependency is already expressed by the Makefiles, storing it in the
.cmd file breaks build if a .c file is replaced by .S or vice versa,
because the .cmd file contains

foo/bar.o: foo/bar.c ...

foo/bar.c ... :

so the foo/bar.c -> foo/bar.o rule triggers even if there is no
foo/bar.c anymore.

Acked-by: Stephen Rothwell 
Signed-off-by: Michal Marek

Make fixdep error handling more explicit

2010-12-22T22:23:28+00:00

Also add missing error handling to fstat call

Signed-off-by: Ben Gamari 
Signed-off-by: Michal Marek

fixdep: use hash table instead of a single array

2010-11-11T16:12:06+00:00

I noticed fixdep uses ~2% of cpu time in kernel build, in function
use_config()

fixdep spends a lot of cpu cycles in linear searches in its internal
string array. With about 400 stored strings per dep file, this begins to
be noticeable.

Convert fixdep to use a hash table.

kbuild results on my x86_64 allmodconfig

Before patch :

real	10m30.414s
user	61m51.456s
sys	8m28.200s

real	10m12.334s
user	61m50.236s
sys	8m30.448s

real	10m42.947s
user	61m50.028s
sys	8m32.380s

After:

real	10m8.180s
user	61m22.506s
sys	8m32.384s

real	10m35.039s
user	61m21.654s
sys	8m32.212s

real	10m14.487s
user	61m23.498s
sys	8m32.312s

Signed-off-by: Eric Dumazet 
Signed-off-by: Michal Marek

kbuild: move autoconf.h to include/generated

2009-12-12T12:08:15+00:00

Signed-off-by: Sam Ravnborg 
Signed-off-by: Michal Marek

Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next

2009-09-23T22:37:02+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next: (30 commits)
  Use macros for .data.page_aligned section.
  Use macros for .bss.page_aligned section.
  Use new __init_task_data macro in arch init_task.c files.
  kbuild: Don't define ALIGN and ENTRY when preprocessing linker scripts.
  arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0
  kbuild: add static to prototypes
  kbuild: fail build if recordmcount.pl fails
  kbuild: set -fconserve-stack option for gcc 4.5
  kbuild: echo the record_mcount command
  gconfig: disable "typeahead find" search in treeviews
  kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling
  checkincludes.pl: add option to remove duplicates in place
  markup_oops: use modinfo to avoid confusion with underscored module names
  checkincludes.pl: provide usage helper
  checkincludes.pl: close file as soon as we're done with it
  ctags: usability fix
  kernel hacking: move STRIP_ASM_SYMS from General
  gitignore usr/initramfs_data.cpio.bz2 and usr/initramfs_data.cpio.lzma
  kbuild: Check if linker supports the -X option
  kbuild: introduce ld-option
  ...

Fix trivial conflict in scripts/basic/fixdep.c

trivial: kbuild: remove extraneous blank line after declaration of usage()

2009-09-21T13:14:58+00:00

Signed-off-by: Trevor Keith 
Signed-off-by: Jiri Kosina