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| author | Luis R. Rodriguez <mcgrof@suse.com> | 2015-10-08 01:16:33 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.com> | 2015-10-08 15:36:16 +0200 |
| commit | 1c199f2878f6c1b8c52125ad9805e94fe2dde472 (patch) | |
| tree | 8f2ecef49d9db9fd3aceeee186cff1959ebb2502 /scripts/kconfig/symbol.c | |
| parent | Linux 4.3-rc1 (diff) | |
| download | linux-1c199f2878f6c1b8c52125ad9805e94fe2dde472.tar.xz linux-1c199f2878f6c1b8c52125ad9805e94fe2dde472.zip | |
kbuild: document recursive dependency limitation / resolution
Recursive dependency issues with kconfig are unavoidable due to
some limitations with kconfig, since these issues are recurring
provide a hint to the user how they can resolve these dependency
issues and also document why such limitation exists.
While at it also document a bit of future prospects of ways to
enhance Kconfig, including providing formal semantics and evaluation
of use of a SAT solver. If you're interested in this work or prospects
of it check out the kconfig-sat project wiki [0] and mailing list [1].
[0] http://kernelnewbies.org/KernelProjects/kconfig-sat
[1] https://groups.google.com/d/forum/kconfig-sat
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: James Bottomley <jbottomley@odin.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mate Soos <soos.mate@gmail.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Michal Marek <mmarek@suse.com>
Diffstat (limited to 'scripts/kconfig/symbol.c')
| -rw-r--r-- | scripts/kconfig/symbol.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c index 50878dc025a5..25cf0c2c0c79 100644 --- a/scripts/kconfig/symbol.c +++ b/scripts/kconfig/symbol.c @@ -1116,6 +1116,8 @@ static void sym_check_print_recursive(struct symbol *last_sym) if (stack->sym == last_sym) fprintf(stderr, "%s:%d:error: recursive dependency detected!\n", prop->file->name, prop->lineno); + fprintf(stderr, "For a resolution refer to Documentation/kbuild/kconfig-language.txt\n"); + fprintf(stderr, "subsection \"Kconfig recursive dependency limitations\"\n"); if (stack->expr) { fprintf(stderr, "%s:%d:\tsymbol %s %s value contains %s\n", prop->file->name, prop->lineno, |