[riot-notifications] [RIOT-OS/RIOT] Makefile.features: add declarative FEATURES_ variables definition (#11492)

Francisco notifications at github.com
Tue May 21 09:03:05 CEST 2019

fjmolinas commented on this pull request.

> @@ -1,3 +1,33 @@
 # Process FEATURES variables
 include $(RIOTBOARD)/$(BOARD)/Makefile.features
+# Resolve FEATURES_ variables
+# Their value will only be complete after resolving dependencies
+# Features that are required by the application but not provided by the BSP
+# Having features missing may case the build to fail.
+# Features that are only optional and not required at the same time.
+# The policy is to use by default whenever they are provided by the BSP.
+# Optional features that will not be used because they are unavailable

> I wanted to separate missing which for me sounds like an error from they are not available but optional anyway/or not used. And even changed it from the previous FEATURES_MISSING message that was in info-build.

I agree with this. But FEATURES_OPTIONAL_UNUSED makes me think of features that are optional but that I (or the build system) have decided not to use. I had to read up the comment and code to understand what it meant since it went against my intuition of what the variable name made me think.

> FEATURES_OPTIONAL_DISABLE #10047 (comment) variable, an optional feature could be provided but not included.

In that case to me its more intuitive to have:




Anyway this is just my interpretation, but I think is exactly the kind of questioning you wanted right?

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