kbuild: Various updates for 2.6.8

From: Sam Ravnborg (sam_at_ravnborg.org)
Date: 07/31/04

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    Date:	Sat, 31 Jul 2004 09:58:38 +0200
To: Linus Torvalds <torvalds@osdl.org>

    Hi Linus.

    I have arranged with Andrew that he sucks my kbuild tree in -mm,
    and this is the fist update I send direct to you.

    The following set of patches has been in -mm for a few days now
    with no complaints. Please include these before 2.6.8.

            bk pull bk://linux-sam.bkbits.net/kbuild

    The most important fix is the $LANG fix. Without this users
    from .cz, .fr etc. cannot use menuconfig/xconfig with good result.

    The cset's:
    o kbuild: Introduce source symlink in /lib/modules/.../
    o kbuild: Create Makefile in output directory if != kernel tree
    o drivers: move STANDALONE to drivers/base/Kconfig
    o kbuild: Two simple kbuild patches
    o kbuild: Fix up moving of modpost
    o kbuild: Move modpost files to a new subdir scripts/mod
    o kbuild: scripts/genksyms/parse.c_shipped needs to be rebuilt
    o kbuild: Less intrusive LANG override, fixes menuconfig
    o kbuild: Rebuild .spec file when kernel version changes
    o kbuild: Allow `make O=<obj> {cscope,tags}` to work
    o kbuild: build binary rpm from pre-built tree

    Full descriptions below.
    Regular diffs available at http://linux-sam.bkbits.net:8080/kbuild

            Sam
            
            

    ChangeSet@1.1859, 2004-07-28 00:36:33+02:00, sam@mars.ravnborg.org
      kbuild: Introduce source symlink in /lib/modules/.../
                                                                                                           
      Traditionally when building a kernel the source and the
      output files are mixed.
                                                                                                           
      When building a kernel using the O= syntax to save output
      files in a separate directory a way is needed to locate
      the kernel source.
      The implemented solution is a new symlink 'source' being
      added to /lib/modules/.../
      used to locate source for an installed kernel.
      The original symlink build points to the directory
      containing the output files.
                                                                                                           
      Please note that when the kernel is build with source and
      output files mixed the two symlinks 'build' and 'source'
      will point to the same directory, thus no changes
      compared to before.
                                                                                                           
      Two options was considered:
                                                                                                            a) Adding a new symlink pointing to the output files "object"
              => All external modules have to specify O= to build
              => External modules grepping in .config or .h files
                 in include/asm needs to be updated
              => External modules that do grep in source code and
                 ordinary header files just works
                                                                                                           
      b) Let the build symlink point to the output files and introduce a new
         symlink "source" pointing to the kernel source
              => External module can be build without specifying O=
              => External modules grepping in .config or .h files
                 in include/asm just works
              => External modules that do grep in source code and
                 ordinary header files needs to be updated
                                                                                                           
      Based on the above option b) is considered the least painfull alternative.
                                                                                                           
      So to sum up:
      - If a distro does not use separate output dir => no change
      - If a distro uses separate output dir =>
              - Trivial external module just builds
              - Non-trivial (build-wise) external modules are probarly broken
                                                                                                           
      Without this patch
      - If a distro does not use separate output dir => no change
      - If a distro uses separate output dir =>
              - Trivial external modules had to specify O= to build,
                and the directory being pointed at was not obvious
              - grep in .config or include files in asm/ required
                knowledge where to locate output files
                                                                                                           
      Preferred syntax for building external modules are the following:
      
             make -C /lib/modules/`uname -r`/build M=`pwd`
      
      [Substituting 'M=...' with 'SUBDIRS=... modules' give same effect].
                                                                                                           
      When the kernel is built using separate output directory the above
      invocation of make will invoke the generated Makefile located in the output
      directory - that again will invoke the Makefile located in the kernel
      source tree root.
                                                                                                           
      Patch includes contributions from:
              Andreas Gruenbacher <agruen@suse.de>
                                                                                                           
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1858, 2004-07-27 23:54:53+02:00, sam@mars.ravnborg.org
      kbuild: Create Makefile in output directory if != kernel tree
      
      When building a kernel using the O= syntax to save output
      files in a separate output directory now create a small Makefile in
      that same dir.
      This Makefile allow one to use make in the output directory without
      the hassle of going back to the kernel source tree.
      The O= option is added by this Makefile stub.
      Please note that the Makefile silently overwrite an old one, so changes
      will be lost if modified.
      If there is a need to tweak a Makefile in the output directory it is recommended
      to use the filename 'makefile', which GNU Make will try first.
      
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1857, 2004-07-27 23:44:01+02:00, sam@mars.ravnborg.org
      drivers: move STANDALONE to drivers/base/Kconfig
      
      Move STANDALONE from init/Kconfig to drivers/base/Kconfig .
      This way, it's besides PREVENT_FIRMWARE_BUILD.
                                                                                      
      Signed-off-by: Adrian Bunk <bunk@fs.tum.de>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1856, 2004-07-23 01:29:55+02:00, kkourt@cslab.ece.ntua.gr
      kbuild: Two simple kbuild patches
      
      foo1.patch: spelling correction in Makefile
      foo2.patch: replace SUBDIRS with M in Documentation/kbuild/modules.txt
      
      From: Kornilios Kourtis <kkourt@cslab.ece.ntua.gr>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1855, 2004-07-23 01:28:19+02:00, sam@mars.ravnborg.org
      kbuild: Fix up moving of modpost
      
      A few small issues to fix the moving of modpost.
      A few files was missing in the commit and one change needed.
      Also bk ignored the files in their new location.
      
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1854, 2004-07-23 00:59:36+02:00, bgerst@didntduck.org
      kbuild: Move modpost files to a new subdir scripts/mod
      
      Move modpost and support files to scripts/mod.
      Directory named mod by Sam.
      
      From: Brian Gerst <bgerst@didntduck.org>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1853, 2004-07-23 00:39:37+02:00, schwab@suse.de
      kbuild: scripts/genksyms/parse.c_shipped needs to be rebuilt
      
      parse.c_shipped has never been regenerated after parse.y has been modified
      4 months ago.
      
      Signed-off-by: Andreas Schwab <schwab@suse.de>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1852, 2004-07-23 00:32:23+02:00, sam@mars.ravnborg.org
      kbuild: Less intrusive LANG override, fixes menuconfig
      
      The locale override caused problems for some people with locale setiings
      different from 'C'. make menuconfig was looking bad / unuseable.
      This patch limit the override of locales to the part where we actually descend the kernel
      doing the full build of the kernel.
      The speed improvement is the same.
      
      make menuconfig should now be useable for all locale settings again.
      Thanks to Marcel Sebek <sebek64@post.cz> for pointing out this problem and being
      paitent in testing.
      
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1851, 2004-07-21 00:14:47+02:00, sam@mars.ravnborg.org
      kbuild: Rebuild .spec file when kernel version changes
      
      Make a dependency in scripts/package/Makefile to top-level Makefile forcing
      .spec file to be generated when kernel version changes.
      
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

    ChangeSet@1.1850, 2004-07-21 00:03:20+02:00, gdavis@mvista.com
      kbuild: Allow `make O=<obj> {cscope,tags}` to work
      
      Allow `make O=<obj> {cscope,tags}` to work

    ChangeSet@1.1849, 2004-07-20 23:57:07+02:00, edwardsg@sgi.com
      kbuild: build binary rpm from pre-built tree
      
      Many times it would be nice to quickly package up a kernel tree you're
      working on, without having to rebuild the whole thing again from a clean
      source tree (like the current rpm-pkg target does). The patch below
      adds an "binrpm-pkg" target which uses your existing (already built)
      tree.
      Modified by me to always do a make and use binrpm-pkg.
      
      Signed-off-by: Greg Edwards <edwardsg@sgi.com>
      Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

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