diff options
Diffstat (limited to 'kconfiglib.py')
| -rw-r--r-- | kconfiglib.py | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/kconfiglib.py b/kconfiglib.py index 97b99ff..e01866c 100644 --- a/kconfiglib.py +++ b/kconfiglib.py @@ -190,6 +190,19 @@ that this includes all symbols that would accept user values). Kconfiglib matches the .config format produced by the C implementations down to the character. This eases testing. +For a visible bool/tristate symbol FOO with value n, this line is written to +.config: + + # CONFIG_FOO is not set + +The point is to remember the user n selection (which might differ from the +default value the symbol would get), while at the same sticking to the rule +that undefined corresponds to n (.config uses Makefile format, making the line +above a comment). When the .config file is read back in, this line will be +treated the same as the following assignment: + + CONFIG_FOO=n + In Kconfiglib, the set of (currently) assignable values for a bool/tristate symbol appear in Symbol.assignable. For other symbol types, just check if sym.visibility is non-0 (non-n) to see whether the user value will have an @@ -2803,7 +2816,8 @@ class Symbol(object): cond_val = expr_value(cond) if cond_val: val = min(expr_value(default), cond_val) - self._write_to_conf = True + if val: + self._write_to_conf = True break # Weak reverse dependencies are only considered if our |