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Documentation: mention scripts/diffconfig tool

The kconfig documentation suggests using plain 'diff' to compare config
files and then adds "Yes, we need something better here".  Commit
a717417 ("kconfig: add diffconfig utility") added what that comment
was looking for.

Signed-off-by: Javi Merino <>
Cc: Michal Marek <>
Signed-off-by: Linus Torvalds <>
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1 parent f52a759 commit 673d29f9a00b0c63ad3f4e2136eb4e181281fbfd @JaviMerino JaviMerino committed with Mar 30, 2012
Showing with 3 additions and 5 deletions.
  1. +3 −5 Documentation/kbuild/kconfig.txt
@@ -28,12 +28,10 @@ new (default) values, so you can use:
grep "(NEW)"
-to see the new config symbols or you can 'diff' the previous and
-new .config files to see the differences:
+to see the new config symbols or you can use diffconfig to see the
+differences between the previous and new .config files:
- diff .config.old .config | less
-(Yes, we need something better here.)
+ scripts/diffconfig .config.old .config | less
Environment variables for '*config'

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