r26926 moved all target features to subtargets if present, which had the
side effect that broken targets are available for selection, just without
any available subtargets (since they are still marked as broken).

Fix this by explicitly letting the top level target also depend on broken.

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build: ensure that reordering of KCONFIG lines are handled properly and that the final result does not depend on the package scan order

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scripts/feeds: redirect stderr of the which call to /dev/null to avoid potentially confusing error messages on some systems

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[scripts] gen-dependencies.sh: only include lib*.so* files in dependency list, to match the filtering of provides lists

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build: prevent the virtual "kernel" package from leaking into the package index to make dependency checks fail on kernel config mismatch

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	- cleanup cache handling code
	- use alternative m// and s/// delimiters to get rid of tedious slash escaping
	- use multi-argument form of system() where possible to avoid quoting & escaping issues
	- avoid a temporary variable

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V=99 and V=1 are now deprecated in favor of a new verbosity class system,
though the old flags are still supported.
You can set the V variable on the command line (or OPENWRT_VERBOSE in the
environment) to one or more of the following characters:

- s: stdout+stderr (equal to the old V=99)
- c: commands (for build systems that suppress commands by default, e.g. kbuild)
- w: warnings/errors only (equal to the old V=1)

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Make the download script follow symlinks and search subfolders when looking for
a file in a local download mirror.

Signed-off-by: Tathagata Das <tathagata@alumnux.com>

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To use the new url, the project name would need to be appended multiple times,
let's hope the old redirect will continue to work in the future

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strip kernel modules more aggressively: make all global symbols local, rename all symbols in the symbol table to make them compress better

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[scripts] patch-specs.sh: gcc 3.4.6 has an additional "(OpenWrt-2.0)" after the version tag, cope with that


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Only append -L and -Wl,-rpath-link flags if the command line contains -l, -L, -shared or -static flags;
this is needed to suppress "-rpath-link: linker input file unused because linking not done" on each cc invocation.


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[scripts] patch-specs.sh: fallback to ext-toolchain.sh --wrap if spec file patching is not possible (gcc < 4.3.0)


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Add a new --config option to generate a .config from a given toolchain,
this allows for easy integration of external toolchains, e.g.

  ./scripts/ext-toolchain.sh --toolchain /opt/mips-2011.03 --cflags "-muclibc" --config atheros

to setup a ready-to-compile atheros target using the external CodeSourcery toolchain.


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	- use GCC's own idea of the target name (-dumpmachine)
	- display help if called without args
	- add copyright foo
	- remove some leftover flag handling code


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The patch-specs.sh utility dumps the GCC specs of a given toolchain
and modifies them to always include $STAGING_DIR in the link and 
compiler command lines, this makes most -I and -L flags unnecessary
and lets the compiler automatically find libraries and headers in
the staging dir, also solves the majority of -rpath issues.


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The ext-toolchain.sh utility script implements various external toolchain tasks:
  * Testing of available features, like c++, soft-float or ipv6 support
  * Finding the libc implementation (uclibc or eglibc/glibc)
  * Inferring the GNU target name
  * Finding shared objects for packaging (libc, libpthread, ...)
  * Finding executables for packaging (ldd, gdbserver, ...)
  * Generating wrapper scripts for toolchain commands


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