halconf and preprocessor switches

[Guillaume227]

Seeing how halconf.h is laid out with preprocessor switches like:

Code: Select all

#if !defined(HAL_USE_SIO) || defined(__DOXYGEN__)
#define HAL_USE_SIO   FALSE
#endif


I expected to be able to set HAL_USE_SIO in the Makefile (e.g. USE_OPT+= -DHAL_USE_SIO=TRUE) as an alternative to editing the halconf.h file.
I ran into undefined errors which I tracked down to that kind of statement in driver.mk:

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ifneq ($(findstring HAL_USE_SIO TRUE,$(HALCONF)),)


So it seems the only way to activate a HAL feature is to actually have a different copy of halconf where the feature is set to TRUE?
Is it just me thinking that's misleading? Am I missing a way to turn a hal feature on 'programmatically'?

[Giovanni]

Hi,

You need to disable the "smart build" option in the makefile then you can add -D switches to override configuration files.

Giovanni

[Guillaume227]

Sounds good - trading some compilation time in that case is totally fine. Thank you Giovanni.