Improves Makefile

Makefile

@@ -1,13 +1,25 @@
 CFLAGS := -Wall -Wextra -std=c++17 -w # Compiler flags
 EMCC_CFLAGS := $(CFLAGS) --bind -s ASSERTIONS=1 -s ERROR_ON_UNDEFINED_SYMBOLS=0 -s EXIT_RUNTIME=0 -s EXPORTED_FUNCTIONS="[]" -s WASM=1 -s MODULARIZE=1 -s NO_EXIT_RUNTIME=1
-MAKEFILES := $(wildcard **/tests/Makefile)
+MAKEFILES := $(wildcard **/tests/Makefile) # $(wildcard **/**/tests/Makefile)
 
-.PHONY: all
+# Check if the system is Linux
+UNAME_S := $(shell uname -s)
+ifeq ($(UNAME_S),Linux)
+    WINE := wine
+    # Set WINEPATH to include MetaTrader directory.
+    export WINEPATH := $(WINEPATH);"C:\Program Files\MetaTrader 4;C:\Program Files\MetaTrader 5"
+else
+    WINE :=
+endif
 
-all: $(MAKEFILES)
+.PHONY: all cpp mql mql4 mql5
+
+all: cpp
+
+cpp mql mql4 mql5: $(MAKEFILES)
 	@ret=0; \
 	for makefile in $(MAKEFILES); do \
-		$(MAKE) -C $$(dirname $$makefile) CFLAGS="$(CFLAGS)" EMCC_CFLAGS="$(EMCC_CFLAGS)" || { ret=$$?; }; \
+		$(MAKE) -C $$(dirname $$makefile) WINE='$(WINE)' WINEPATH='$(WINEPATH)' $@ || { ret=$$?; }; \
 	done; \
 	exit $$ret