Makefile.include: FIX .DEFAULT_GOAL not being all

Makefile.include

@@ -1,3 +1,6 @@
+# Globally set default goal to `all`
+.DEFAULT_GOAL := all
+
 # include Makefile.local if it exists
 -include Makefile.local
 
@@ -460,8 +463,7 @@ $(CURDIR)/eclipsesym.xml:
 # Export variables used throughout the whole make system:
 include $(RIOTMAKE)/vars.inc.mk
 
-# Include build targets for selected tools after the default RIOT targets have
-# been defined (-> so the `all` will be always the first target)
+# Include build targets for selected tools
 include $(RIOTMAKE)/tools/targets.inc.mk
 
 # Warn if the selected board and drivers don't provide all needed features:
@@ -590,4 +592,9 @@ CFLAGS += -include '$(RIOTBUILD_CONFIG_HEADER_C)'
 
 # include mcuboot support
 include $(RIOTMAKE)/mcuboot.mk
+
+# Sanity check, 'all' should be the default goal
+ifneq (all, $(.DEFAULT_GOAL))
+  $(error .DEFAULT_GOAL := $(.DEFAULT_GOAL))
+endif
 endif # BOARD=none

boards/common/frdm/Makefile.include

@@ -26,9 +26,6 @@ export OPENOCD_EXTRA_INIT
 .PHONY: flash
 flash: $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
 
-# Reset the default goal.
-.DEFAULT_GOAL :=
-
 export OPENOCD_CONFIG ?= $(RIOTBOARD)/common/frdm/dist/old-openocd-$(CPU_FAMILY).cfg
 endif
 

boards/mulle/Makefile.include

@@ -61,9 +61,6 @@ export PRE_FLASH_CHECK_SCRIPT = $(RIOTCPU)/$(CPU)/dist/check-fcfield-elf.sh
 .PHONY: flash
 flash: $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
 
-# Reset the default goal.
-.DEFAULT_GOAL :=
-
 # this board uses openocd
 include $(RIOTMAKE)/tools/openocd.inc.mk
 

boards/pba-d-01-kw2x/Makefile.include

@@ -15,9 +15,6 @@ PORT_DARWIN ?= $(firstword $(sort $(wildcard /dev/tty.usbmodem*)))
 .PHONY: flash
 flash: $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin
 
-# Reset the default goal.
-.DEFAULT_GOAL :=
-
 # We need special handling of the watchdog if we want to speed up the flash
 # verification by using the MCU to compute the image checksum after flashing.
 # wdog-disable.bin is a precompiled binary which will disable the watchdog and

cpu/kinetis/Makefile.include

@@ -44,7 +44,4 @@ USEMODULE += periph_wdog
 $(RIOTCPU)/$(CPU)/dist/wdog-disable.bin: $(RIOTCPU)/$(CPU)/dist/wdog-disable.s
 	$(Q)$(MAKE) -C $(RIOTCPU)/$(CPU)/dist/ $(notdir $@)
 
-# Reset the default goal to not make wdog-disable.bin the default target.
-.DEFAULT_GOAL :=
-
 include $(RIOTMAKE)/arch/cortexm.inc.mk

makefiles/scan-build.inc.mk

@@ -87,6 +87,3 @@ else
 	    echo "No report found"; \
 	  fi
 endif
-
-# Reset the default goal.
-.DEFAULT_GOAL :=