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authorLuis R. Rodriguez <mcgrof@suse.com>2015-10-07 16:16:33 -0700
committerMichal Marek <mmarek@suse.com>2015-10-08 15:36:16 +0200
commit1c199f2878f6c1b8c52125ad9805e94fe2dde472 (patch)
tree8f2ecef49d9db9fd3aceeee186cff1959ebb2502 /scripts/kconfig/symbol.c
parent6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f (diff)
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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.c2
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,