[Devel] Build system, next attempt [was: FT2 + cygwin]

[Fleischer, Karsten (K.)]

Hi all,

I've made some changes to the build system once again. Hope this one's OK
for all of us.

You can now disable platform auto-detection by specifying the desired
platform with the setup option, i.e. "make setup unix" or "make setup unix
devel".

In builds/detect.mk I check for all auto-detectable platforms with the
statement

PLATFORMS_ := $(notdir $(subst /detect.mk,,$(wildcard
$(BUILD_CONFIG_)*/detect.mk)))

Then I check if one of these platforms is specified as setup target:

PLATFORM := $(firstword $(filter $(MAKECMDGOALS),$(PLATFORMS_)))

If no platform was specified I revert PLATFORM to ansi. This also enables
auto-detection.

The structure of the builds/*/detect.mk files has changed slightly.
The auto-detection is now a seperate part introduced by 'ifeq
($(PLATFORM),ansi))'. Here has to go whatever is needed to detect the
platform.
If the platform has been auto-detected the PLATFORM variable has to be set
accordingly.
Other settings (CONFIG_FILE, SEP, CC etc.) have to be done in a second part,
which is introduced by 'ifeq ($(PLATFORM),platform name)'. Handling of
special setup targets (devel etc.) has to be done here, too.

David, Werner, please have a look at it.

Cheers, 

Karsten

builds.tar.gz
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