Merge pull request #21199 from crasbe/pr/fix_makechecks

Makefile.include: perform checks for all relevant targets

Makefile.include

@@ -934,7 +934,7 @@ include $(RIOTMAKE)/tools/targets.inc.mk
 include $(RIOTMAKE)/usb-codes.inc.mk
 
 # Warn if the selected board and drivers don't provide all needed features:
-ifneq (, $(filter all flash, $(if $(MAKECMDGOALS), $(MAKECMDGOALS), all)))
+ifeq (, $(filter help generate-Makefile.ci, $(MAKECMDGOALS)))
   EXPECT_ERRORS :=
 
   # Test if there where dependencies against a module in DISABLE_MODULE.
@@ -1012,7 +1012,8 @@ endif
 
 help:
   # filter all targets starting with lowercase and containing lowercase letters, hyphens, or underscores; explicitly include generate-Makefile.ci
-	@$(MAKE) -qp | sed -ne 's/\(^[a-z][a-z_-]*\|generate-Makefile.ci\):.*/\1/p' | sort -u
+  # inspired by: https://stackoverflow.com/a/26339924
+	@LC_ALL=C $(MAKE) -pRrq -f $(firstword $(MAKEFILE_LIST)) : 2>/dev/null | sed -ne 's/\(^[a-z][a-z_-]*\|generate-Makefile.ci\):.*/\1/p' | sort -u
 
 ifeq (iotlab-m3,$(BOARD))
   ifneq (,$(filter iotlab-%,$(MAKECMDGOALS)))