Changed the name of the default make action.

(Redmine issue: #3387)

MMakefile

@@ -23,7 +23,10 @@ NC=\033[0m
 
 #-------------------------------------------------------------------------------
 
-all: help
+#
+# Default make target, alias for 'help', you must explicitly choose the target.
+#
+default: help
 
 check: pyflakes pylint test
 
@@ -31,12 +34,10 @@ check: pyflakes pylint test
 
 
 help:
-#@echo -e "\033[0;32m [OK] \033[0m       \033[0;33m Compiling:\033[0m" $<
-
 	@echo ""
 	@echo "${RED}LIST OF MAKE TARGETS:${NC}"
 	@echo ""
-	@echo "  * ${GREEN}all${NC}: alias for help, you have to pick a target [default]"
+	@echo "  * ${GREEN}default${NC}: alias for help, you have to pick a target"
 	@echo "  * ${GREEN}help${NC}: print this help and exit"
 	@echo "  * ${GREEN}deps${NC}: install various dependencies"
 	@echo "     = ${ORANGE}deps-python${NC}: install Python dependencies with pip3"