Add support for KCONFIG_ALLCONFIG

This allows some symbol values to be forced while running
all{def,no,yes,mod}config.py. See Documentation/kbuild/kconfig.txt in
the Linux kernel.

Add a helper function load_allconfig() to Kconfiglib to avoid code
duplication in the tools.

Also add functions for enabling/disabling the warning that's generated
when a symbol is assigned multiple times in a (set of) .config files and
the values differ. It should be disabled when merging the
KCONFIG_ALLCONFIG configuration file. Previously, only the warning
generated when the assigned values are identical could be disabled.

Disable all warnings related to assigning a symbol multiple times in
examples/merge_config.py as well.

1 files changed, 4 insertions, 0 deletions

diff --git a/allmodconfig.py b/allmodconfig.py
index 92a00e1..d1e64f6 100755
--- a/allmodconfig.py
+++ b/allmodconfig.py
@@ -38,6 +38,10 @@ def main():
     for choice in kconf.unique_choices:
         choice.set_value(2 if choice.orig_type == BOOL else 1)
 
+    kconf.enable_warnings()
+
+    kconfiglib.load_allconfig(kconf, "allmod.config")
+
     kconf.write_config(kconfiglib.standard_config_filename())
 
 if __name__ == "__main__":