Messages in this thread | | | From | Linus Torvalds <> | Date | Thu, 9 Aug 2012 06:45:37 +0300 | Subject | Re: [RFC PATCH 3/4] ftrace: Do not test frame pointers if -mfentry is used |
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On Wed, Aug 8, 2012 at 3:49 PM, Steven Rostedt <rostedt@goodmis.org> wrote: > > No, CONFIG_HAVE_FENTRY just means fentry is supported, it does not mean > that it is being used. It only gets used if CC_USING_FENTRY is set, > which is set by the Makefile at time of compile.
Btw, it might be lovely to consider the concept of "Kconfig variables set by shell-scripts".
We currently have a metric sh*t-ton of Makefile magic for testing various things like this, and integrating it into Kconfig might be a good idea. That way you would be able to use the Kconfig logic on these things.
Kconfig already has the "option env=XYZ" syntax for importing values from the environment variables. Extending it to some kind of "option shell=xyz" would allow for more complex interactions like this (imagine testing compiler options and version dependencies in the Kconfig files instead of the Makefiles)?
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