polish

Makefile

@@ -77,6 +77,17 @@ endif
 endif
 
 # Include .mk files.
+BUILT_LANGUAGES = C++
+ifeq ($(BUILD_PYTHON),ON)
+BUILT_LANGUAGES +=, Python$(PYTHON_VERSION)
+endif
+ifeq ($(BUILD_JAVA),ON)
+BUILT_LANGUAGES +=, Java
+endif
+ifeq ($(BUILD_DOTNET),ON)
+BUILT_LANGUAGES +=, .Net (6.0)
+endif
+
 include $(OR_ROOT)makefiles/Makefile.cpp.mk
 include $(OR_ROOT)makefiles/Makefile.python.mk
 include $(OR_ROOT)makefiles/Makefile.java.mk

makefiles/Makefile.cpp.mk

@@ -29,8 +29,6 @@ OR_TOOLS_LIBS = $(LIB_DIR)/$(LIB_PREFIX)ortools.$L.$(OR_TOOLS_MAJOR)
 endif
 endif
 
-BUILT_LANGUAGES = C++
-
 # Main target
 .PHONY: cc # Build C++ OR-Tools library.
 .PHONY: test_cc # Run all C++ OR-Tools test targets.

makefiles/Makefile.dotnet.mk

@@ -32,8 +32,6 @@ DOTNET_ORTOOLS_ASSEMBLY_NAME := Google.OrTools
 
 dotnet: $(OR_TOOLS_LIBS)
 
-BUILT_LANGUAGES += , .Net (6.0)
-
 ###################
 ##  .NET SOURCE  ##
 ###################

makefiles/Makefile.java.mk

@@ -35,7 +35,6 @@ JAVA_ORTOOLS_PACKAGE := com.google.ortools
 .PHONY: java # Build Java OR-Tools.
 .PHONY: test_java # Test Java OR-Tools using various examples.
 java: $(OR_TOOLS_LIBS)
-BUILT_LANGUAGES +=, Java
 
 # Detect RuntimeIDentifier
 ifeq ($(OS),Windows)

makefiles/Makefile.python.mk

@@ -22,8 +22,6 @@ PYTHON_EXECUTABLE := dependencies$Spython$Svenv$Sbin$Spython
 
 python: $(OR_TOOLS_LIBS)
 
-BUILT_LANGUAGES += , Python$(PYTHON_VERSION)
-
 #######################
 ##  Python SOURCE  ##
 #######################