[build] Add "make help" command

Makefile

@@ -32,7 +32,6 @@ endef
 
 .PHONY: info
 info:
-	@echo "========= Building Flags ========="
 	@echo "EPSILON_VERSION = $(EPSILON_VERSION)"
 	@echo "EPSILON_APPS = $(EPSILON_APPS)"
 	@echo "EPSILON_I18N = $(EPSILON_I18N)"
@@ -44,54 +43,28 @@ info:
 	@echo "ION_STORAGE_LOG" = $(ION_STORAGE_LOG)
 	@echo "POINCARE_TREE_LOG" = $(POINCARE_TREE_LOG)
 	@echo "POINCARE_TESTS_PRINT_EXPRESSIONS" = $(POINCARE_TESTS_PRINT_EXPRESSIONS)
-	@echo "=================================="
-	@echo ""
-	@echo "============= Targets ============"
-	@echo "--------- Cross-platforms --------"
-	@echo "epsilon"
-	@echo "epsilon.on-boarding"
-	@echo "epsilon.on-boarding.update"
-	@echo "epsilon.on-boarding.beta"
-	@echo "test"
-	@echo "PHONY:"
-	@echo "  clean"
-	@echo "  clean_for_apps_selection (use this 'light' clean before changing the flag EPSILON_APPS)"
-	@echo "----------------------------------"
-	@echo ""
-	@echo "------------- Device -------------"
-	@echo "flasher.light"
-	@echo "flasher.verbose"
-	@echo "bench.ram"
-	@echo "bench.flash"
-	@echo "PHONY:"
-	@echo "  binpack"
-	@echo "  %_two_binaries"
-	@echo "  %_size"
-	@echo "  %_run"
-	@echo "  %_memory_map"
-	@echo "  %_flash"
-	@echo "  clean_for_apps_selection (use this 'light' clean before changing the flag EPSILON_APPS)"
-	@echo ".............N0110................"
-	@echo "test.external_flash.write"
-	@echo "test.external_flash.read"
-	@echo ".................................."
-	@echo "----------------------------------"
-	@echo ""
-	@echo "----------- emscripten -----------"
-	@echo "simulator.zip"
-	@echo "----------------------------------"
-	@echo ""
-	@echo "----------- blackbox -------------"
-	@echo "compare"
-	@echo "PHONY:"
-	@echo "  tests/%.run"
-	@echo "  tests/%.render"
-	@echo "  integration_tests"
-	@echo "  epsilon_fuzz"
-	@echo "  compare_fuzz"
-	@echo "----------------------------------"
+
+.PHONY: help
+help:
+	@echo "Device targets"
+	@echo "  make epsilon_flash"
+	@echo "  make epsilon.dfu"
+	@echo "  make epsilon.on-boarding.dfu"
+	@echo "  make epsilon.on-boarding.update.dfu"
+	@echo "  make epsilon.on-boarding.beta.dfu"
+	@echo "  make flasher.light.bin"
+	@echo "  make flasher.verbose.dfu"
+	@echo "  make bench.ram.bin"
+	@echo "  make bench.flash.bin"
+	@echo "  make binpack"
 	@echo ""
-	@echo "=================================="
+	@echo "Simulator targets"
+	@echo "  make PLATFORM=simulator"
+	@echo "  make PLATFORM=simulator TARGET=android"
+	@echo "  make PLATFORM=simulator TARGET=ios"
+	@echo "  make PLATFORM=simulator TARGET=macos"
+	@echo "  make PLATFORM=simulator TARGET=web"
+	@echo "  make PLATFORM=simulator TARGET=windows"
 
 # Since we're building out-of-tree, we need to make sure the output directories
 # are created, otherwise the receipes will fail (e.g. gcc will fail to create