From ffad5bbc40f0086f18e0bbbecb5fd6ae370dedd3 Mon Sep 17 00:00:00 2001
From: Laurent Perron <lperron@google.com>
Date: Tue, 22 Feb 2022 10:11:08 +0100
Subject: [PATCH] huge makefile cleanup; remove Makefile.local; detect all
 languages

---
 Makefile                               |  6 +-
 makefiles/Makefile.cpp.mk              | 10 +--
 makefiles/Makefile.dotnet.mk           | 30 +++++----
 makefiles/Makefile.java.mk             | 82 +++++++++----------------
 makefiles/Makefile.port.mk             | 28 +--------
 makefiles/Makefile.python.mk           | 31 ++++------
 makefiles/Makefile.third_party.unix.mk | 46 +-------------
 makefiles/Makefile.third_party.win.mk  | 34 +----------
 makefiles/Makefile.unix.mk             | 84 ++++++++++++--------------
 makefiles/Makefile.win.mk              | 58 ++++++++++++------
 10 files changed, 145 insertions(+), 264 deletions(-)

diff --git a/Makefile b/Makefile
index 8417d71977..1bcd205857 100644
--- a/Makefile
+++ b/Makefile
@@ -53,9 +53,6 @@ include $(OR_ROOT)Version.txt
 include $(OR_ROOT)makefiles/Makefile.port.mk
 OR_ROOT_FULL=$(OR_TOOLS_TOP)
 
-# Load local variables
-include $(OR_ROOT)Makefile.local
-
 # Change the file extensions to increase diff tool friendliness.
 # Then include specific system commands and definitions
 include $(OR_ROOT)makefiles/Makefile.$(SYSTEM).mk
@@ -127,11 +124,10 @@ test_all: test_cc test_python test_java test_dotnet
 	@echo Or-tools have been built and tested for $(BUILT_LANGUAGES)
 
 .PHONY: clean_all
-clean_all: clean_cc clean_python clean_java clean_dotnet clean_compat clean_archive
+clean_all: clean_cc clean_python clean_java clean_dotnet clean_archive clean_third_party
 	-$(DELREC) $(BIN_DIR)
 	-$(DELREC) $(LIB_DIR)
 	-$(DELREC) $(OBJ_DIR)
-	-$(DELREC) $(GEN_PATH)
 	@echo Or-tools have been cleaned for $(BUILT_LANGUAGES)
 
 .PHONY: detect_all
diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
index b5b810f2b4..7be00c8e78 100644
--- a/makefiles/Makefile.cpp.mk
+++ b/makefiles/Makefile.cpp.mk
@@ -29,6 +29,8 @@ 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.
@@ -567,14 +569,6 @@ clean_cc:
 	-$(DELREC) $(TEMP_PACKAGE_CC_DIR)
 	-$(DELREC) $(TEMP_CC_DIR)
 
-.PHONY: clean_compat
-clean_compat:
-	-$(DELREC) $(OR_ROOT)constraint_solver
-	-$(DELREC) $(OR_ROOT)linear_solver
-	-$(DELREC) $(OR_ROOT)algorithms
-	-$(DELREC) $(OR_ROOT)graph
-	-$(DELREC) $(OR_ROOT)gen
-
 #############
 ##  DEBUG  ##
 #############
diff --git a/makefiles/Makefile.dotnet.mk b/makefiles/Makefile.dotnet.mk
index 2841fdf2fc..b40f18096e 100644
--- a/makefiles/Makefile.dotnet.mk
+++ b/makefiles/Makefile.dotnet.mk
@@ -1,4 +1,11 @@
-# ---------- dotnet support using SWIG ----------
+ifeq ($(BUILD_DOTNET),OFF)
+dotnet:
+	$(warning Either .NET support was turned of, of the dotnet binary was not found.)
+
+test_dotnet: dotnet
+package_dotnet: dotnet
+else
+
 .PHONY: help_dotnet # Generate list of dotnet targets with descriptions.
 help_dotnet:
 	@echo Use one of the following dotnet targets:
@@ -11,12 +18,12 @@ else
 endif
 
 # Check for required build tools
-DOTNET = dotnet
 ifeq ($(SYSTEM),win)
-DOTNET_BIN := $(shell $(WHICH) $(DOTNET) 2> NUL)
+DOTNET_BIN := $(shell $(WHICH) dotnet 2> NUL)
 else # UNIX
-DOTNET_BIN := $(shell command -v $(DOTNET) 2> /dev/null)
+DOTNET_BIN := $(shell $(WHICH) dotnet 2> /dev/null)
 endif
+
 # All libraries and dependencies
 TEMP_DOTNET_DIR = temp_dotnet
 DOTNET_PACKAGE_DIR = temp_dotnet/packages
@@ -24,6 +31,7 @@ DOTNET_PACKAGE_PATH = $(subst /,$S,$(DOTNET_PACKAGE_DIR))
 DOTNET_ORTOOLS_ASSEMBLY_NAME := Google.OrTools
 
 dotnet: $(OR_TOOLS_LIBS)
+BUILT_LANGUAGES +=, .Net (6.0)
 
 ###################
 ##  .NET SOURCE  ##
@@ -663,6 +671,8 @@ nuget_upload: nuget_archive
 	@echo Uploading Nuget package for "net6.0".
 	$(warning Not Implemented)
 
+endif  # BUILD_DOTNET=ON
+
 ################
 ##  Cleaning  ##
 ################
@@ -670,7 +680,7 @@ nuget_upload: nuget_archive
 clean_dotnet:
 	-$(DELREC) ortools$Sdotnet$SCreateSigningKey$Sbin
 	-$(DELREC) ortools$Sdotnet$SCreateSigningKey$Sobj
-	-$(DEL) $(DOTNET_ORTOOLS_SNK_PATH)
+#	-$(DEL) $(DOTNET_ORTOOLS_SNK_PATH)
 	-$(DELREC) $(TEMP_DOTNET_DIR)
 	-$(DEL) $(GEN_PATH)$Sortools$Salgorithms$S*.cs
 	-$(DEL) $(GEN_PATH)$Sortools$Salgorithms$S*csharp_wrap*
@@ -687,9 +697,9 @@ clean_dotnet:
 	-$(DEL) $(GEN_PATH)$Sortools$Sinit$S*.cs
 	-$(DEL) $(GEN_PATH)$Sortools$Sinit$S*csharp_wrap*
 	-$(DEL) $(OBJ_DIR)$Sswig$S*_csharp_wrap.$O
-	-$(DEL) $(LIB_DIR)$S$(DOTNET_ORTOOLS_NATIVE).*
-	-$(DEL) $(BIN_DIR)$S$(DOTNET_ORTOOLS_ASSEMBLY_NAME).*
-	-$(DEL) $(BIN_DIR)$S$(FSHARP_ORTOOLS_ASSEMBLY_NAME).*
+#	-$(DEL) $(LIB_DIR)$S$(DOTNET_ORTOOLS_NATIVE).*
+#	-$(DEL) $(BIN_DIR)$S$(DOTNET_ORTOOLS_ASSEMBLY_NAME).*
+#	-$(DEL) $(BIN_DIR)$S$(FSHARP_ORTOOLS_ASSEMBLY_NAME).*
 	-$(DELREC) $(DOTNET_EX_PATH)$Sbin
 	-$(DELREC) $(DOTNET_EX_PATH)$Sobj
 	-$(DELREC) $(CONTRIB_EX_PATH)$Sbin
@@ -721,9 +731,6 @@ detect_dotnet:
 	@echo PROTOC = $(PROTOC)
 	@echo DOTNET_SNK = $(DOTNET_SNK)
 	@echo DOTNET_ORTOOLS_SNK = $(DOTNET_ORTOOLS_SNK)
-	@echo SWIG_BINARY = $(SWIG_BINARY)
-	@echo SWIG_INC = $(SWIG_INC)
-	@echo SWIG_DOTNET_LIB_SUFFIX = $(SWIG_DOTNET_LIB_SUFFIX)
 	@echo DOTNET_ORTOOLS_NATIVE = $(DOTNET_ORTOOLS_NATIVE)
 	@echo DOTNET_ORTOOLS_RUNTIME_ASSEMBLY_NAME =$(DOTNET_ORTOOLS_RUNTIME_ASSEMBLY_NAME)
 	@echo DOTNET_ORTOOLS_RUNTIME_NUPKG = $(DOTNET_ORTOOLS_RUNTIME_NUPKG)
@@ -737,3 +744,4 @@ ifeq ($(SYSTEM),win)
 else
 	@echo
 endif
+
diff --git a/makefiles/Makefile.java.mk b/makefiles/Makefile.java.mk
index 130d730533..75ed298c80 100644
--- a/makefiles/Makefile.java.mk
+++ b/makefiles/Makefile.java.mk
@@ -1,4 +1,21 @@
-# ---------- Java support using SWIG ----------
+ifeq ($(BUILD_JAVA),OFF)
+java_runtime: java
+java:
+	@echo JAVA_HOME = $(JAVA_HOME)
+	@echo JAVAC_BIN = $(JAVAC_BIN)
+	@echo JAR_BIN = $(JAR_BIN)
+	@echo JAVA_BIN = $(JAVA_BIN)
+	@echo MVN_BIN = $(MVN_BIN)
+	$(warning Either JAVA support was turned off, or the the makefile cannot\
+	 find 'java' or 'maven' command which is needed for build. \
+     Please make sure it is installed and in system path. \
+     Or turn java support ON.)
+check_java: java
+test_java: java
+package_java: java
+
+else  # BUILD_JAVA=ON
+
 .PHONY: help_java # Generate list of Java targets with descriptions.
 help_java:
 	@echo Use one of the following Java targets:
@@ -10,51 +27,16 @@ else
 	@echo
 endif
 
-# Check for required build tools
-HAS_JAVA = true
-ifndef JAVAC_BIN
-HAS_JAVA =
-endif
-ifndef JAR_BIN
-HAS_JAVA =
-endif
-ifndef JAVA_BIN
-HAS_JAVA =
-endif
-ifndef MVN_BIN
-HAS_JAVA =
-endif
-
 TEMP_JAVA_DIR = temp_java
 JAVA_ORTOOLS_PACKAGE := com.google.ortools
-JAVA_ORTOOLS_JAR := $(LIB_DIR)/$(JAVA_ORTOOLS_PACKAGE)$J
-JAVA_ORTOOLS_NATIVE_LIBS := $(LIB_DIR)/$(LIB_PREFIX)jniortools.$(JNI_LIB_EXT)
-JAVAFLAGS := -Djava.library.path=$(LIB_DIR)
 
 # Main target
 .PHONY: java_runtime # Build Java OR-Tools runtime.
 .PHONY: java # Build Java OR-Tools.
 .PHONY: test_java # Test Java OR-Tools using various examples.
-ifndef HAS_JAVA
-java_runtime: java
-java:
-	@echo JAVA_HOME = $(JAVA_HOME)
-	@echo JAVAC_BIN = $(JAVAC_BIN)
-	@echo JAR_BIN = $(JAR_BIN)
-	@echo JAVA_BIN = $(JAVA_BIN)
-	@echo MVN_BIN = $(MVN_BIN)
-	$(warning Cannot find 'java' or 'maven' command which is needed for build. \
- Please make sure it is installed and in system path. \
- Check Makefile.local for more information.)
-check_java: java
-test_java: java
-else
-java_runtime: java_runtime_pimpl
 java: $(OR_TOOLS_LIBS)
-check_java: check_java_pimpl
-test_java: test_java_pimpl
 BUILT_LANGUAGES +=, Java
-endif
+
 # Detect RuntimeIDentifier
 ifeq ($(OS),Windows)
 JAVA_NATIVE_IDENTIFIER=win32-x86-64
@@ -310,8 +292,8 @@ test_java_sat_samples: \
  rjava_StepFunctionSampleSat \
  rjava_StopAfterNSolutionsSampleSat
 
-.PHONY: check_java_pimpl
-check_java_pimpl: \
+.PHONY: check_java
+check_java: \
  test_java_algorithms_samples \
  test_java_constraint_solver_samples \
  test_java_graph_samples \
@@ -388,19 +370,19 @@ test_java_java: \
  rjava_RabbitsPheasants \
  rjava_RandomTsp
 
-.PHONY: test_java_pimpl
-test_java_pimpl: \
- check_java_pimpl \
+.PHONY: test_java
+test_java: \
+ check_java \
  test_java_tests \
  test_java_contrib \
  test_java_java
 
-.PHONY: publish_java_runtime_pimpl
-publish_java_runtime_pimpl: java_runtime
+.PHONY: publish_java_runtime
+publish_java_runtime: java_runtime
 	cd $(TEMP_JAVA_DIR)$S$(JAVA_ORTOOLS_NATIVE_PROJECT) && "$(MVN_BIN)" deploy
 
-.PHONY: publish_java_pimpl
-publish_java_pimpl: java
+.PHONY: publish_java
+publish_java: java
 	cd $(TEMP_JAVA_DIR)$S$(JAVA_ORTOOLS_PROJECT) && "$(MVN_BIN)" deploy
 
 #######################
@@ -475,6 +457,8 @@ else
 endif
 	-$(DELREC) $(TEMP_JAVA_DIR)$Sortools_examples
 
+endif  # BUILD_JAVA=ON	
+
 ################
 ##  Cleaning  ##
 ################
@@ -503,17 +487,11 @@ clean_java:
 .PHONY: detect_java # Show variables used to build Java OR-Tools.
 detect_java:
 	@echo Relevant info for the Java build:
-	@echo JAVA_INC = $(JAVA_INC)
-	@echo JNIFLAGS = $(JNIFLAGS)
 	@echo JAVA_HOME = $(JAVA_HOME)
 	@echo JAVAC_BIN = $(JAVAC_BIN)
 	@echo CLASS_DIR = $(CLASS_DIR)
 	@echo JAR_BIN = $(JAR_BIN)
 	@echo JAVA_BIN = $(JAVA_BIN)
-	@echo JAVAFLAGS = $(JAVAFLAGS)
-	@echo JAVA_ORTOOLS_JAR = $(JAVA_ORTOOLS_JAR)
-	@echo SWIG_BINARY = $(SWIG_BINARY)
-	@echo SWIG_INC = $(SWIG_INC)
 	@echo MVN_BIN = $(MVN_BIN)
 	@echo JAVA_ORTOOLS_PACKAGE = $(JAVA_ORTOOLS_PACKAGE)
 	@echo JAVA_ORTOOLS_NATIVE_PROJECT = $(JAVA_ORTOOLS_NATIVE_PROJECT)
diff --git a/makefiles/Makefile.port.mk b/makefiles/Makefile.port.mk
index 5704baf353..c878e9b394 100644
--- a/makefiles/Makefile.port.mk
+++ b/makefiles/Makefile.port.mk
@@ -17,15 +17,7 @@ endif
 ifeq ($(SYSTEM),unix)
   OR_TOOLS_TOP ?= $(shell pwd)
   OS = $(shell uname -s)
-  ifeq ($(UNIX_PYTHON_VER),)
-    ifeq ($(shell which python3),)
-      DETECTED_PYTHON_VERSION := $(shell python -c "from sys import version_info as v; print (str(v[0]) + '.' + str(v[1]))")
-    else
-      DETECTED_PYTHON_VERSION := $(shell python3 -c "from sys import version_info as v; print (str(v[0]) + '.' + str(v[1]))")
-    endif
-  else
-    DETECTED_PYTHON_VERSION := $(UNIX_PYTHON_VER)
-  endif
+  PYTHON_VERSION ?= $(shell python3 -c "from sys import version_info as v; print (str(v[0]) + '.' + str(v[1]))")
 
   ifeq ($(OS),Linux)
     PLATFORM = LINUX
@@ -174,21 +166,7 @@ ifeq ("$(SYSTEM)","win")
   CBC_PLATFORM = $(CBC_PLATFORM_PREFIX)-$(VS_RELEASE)-Release
 
   # Detect Python
-  ifeq ($(WINDOWS_PATH_TO_PYTHON),)
-    DETECTED_PATH_TO_PYTHON = $(shell python -c "from sys import executable; from os.path import sep; print(sep.join(executable.split(sep)[:-1]).rstrip())")
-    CANONIC_DETECTED_PATH_TO_PYTHON = $(subst $(SPACE),$(BACKSLASH_SPACE),$(subst \,/,$(subst \\,/,$(DETECTED_PATH_TO_PYTHON))))
-    ifeq ($(wildcard $(CANONIC_DETECTED_PATH_TO_PYTHON)),)
-      SELECTED_PATH_TO_PYTHON = WINDOWS_PATH_TO_PYTHON =\# python was not found. Set this variable to the path to python to build the python files. Don\'t include the name of the executable in the path! (ex: WINDOWS_PATH_TO_PYTHON = c:\\python37-64)
-    else
-      SELECTED_PATH_TO_PYTHON = WINDOWS_PATH_TO_PYTHON = $(DETECTED_PATH_TO_PYTHON)
-      WINDOWS_PATH_TO_PYTHON = $(DETECTED_PATH_TO_PYTHON)
-    endif
-  else
-    SELECTED_PATH_TO_PYTHON = WINDOWS_PATH_TO_PYTHON = $(WINDOWS_PATH_TO_PYTHON)
-  endif
-  ifneq ($(WINDOWS_PATH_TO_PYTHON),)
-    WINDOWS_PYTHON_VERSION = $(shell "$(WINDOWS_PATH_TO_PYTHON)\python" -c "from sys import version_info as v; print (str(v[0]) + str(v[1]))")
-  endif
+  PYTHON_VERSION ?= $(shell  -c "from sys import version_info as v; print (str(v[0]) + str(v[1]))")
 endif # ($(SYSTEM),win)
 
 # Get github revision level
@@ -233,8 +211,6 @@ detect_port:
 ifeq ($(SYSTEM),win)
 	@echo CMAKE_PLATFORM = $(CMAKE_PLATFORM)
 endif
-	@echo SWIG_BINARY = $(SWIG_BINARY)
-	@echo SWIG_INC = $(SWIG_INC)
 ifeq ($(SYSTEM),win)
 	@echo off & echo(
 else
diff --git a/makefiles/Makefile.python.mk b/makefiles/Makefile.python.mk
index 77c53a5e1e..0629aa6baf 100644
--- a/makefiles/Makefile.python.mk
+++ b/makefiles/Makefile.python.mk
@@ -1,4 +1,12 @@
-# ---------- Python support using SWIG ----------
+ifeq ($(BUILD_PYTHON),OFF)
+python:
+	$(warning Either Python support was turned off, or the python3 binary was not found.)
+
+test_python: python
+package_python: python
+
+else  # BUILD_PYTHON=ON
+
 .PHONY: help_python # Generate list of Python targets with descriptions.
 help_python:
 	@echo Use one of the following Python targets:
@@ -14,6 +22,8 @@ PYTHON_EXECUTABLE := dependencies$Spython$Svenv$Sbin$Spython
 
 python: $(OR_TOOLS_LIBS)
 
+BUILT_LANGUAGES += , Python$(PYTHON_VERSION)
+
 #######################
 ##  Python SOURCE  ##
 #######################
@@ -612,6 +622,8 @@ else
 endif
 	-$(DELREC) $(TEMP_PYTHON_DIR)$Sortools_examples
 
+endif  # BUILD_PYTHON=ON
+
 ################
 ##  Cleaning  ##
 ################
@@ -680,7 +692,6 @@ clean_python:
 	-$(DELREC) ortools$Sutil$S__pycache__
 	-$(DEL) $(GEN_PATH)$Sortools$Sutil$S*_python_wrap.*
 	-$(DEL) $(GEN_PATH)$Sortools$Sutil$S_*
-	-$(DEL) $(LIB_DIR)$S_*.$(SWIG_PYTHON_LIB_SUFFIX)
 	-$(DEL) $(OBJ_DIR)$Sswig$S*python_wrap.$O
 	-$(DEL) *.whl
 	-$(DELREC) temp_python*
@@ -691,24 +702,8 @@ clean_python:
 .PHONY: detect_python # Show variables used to build Python OR-Tools.
 detect_python:
 	@echo Relevant info for the Python build:
-ifeq ($(SYSTEM),win)
-	@echo WINDOWS_PATH_TO_PYTHON = "$(WINDOWS_PATH_TO_PYTHON)"
-else
-	@echo UNIX_PYTHON_VER = "$(UNIX_PYTHON_VER)"
-endif
-	@echo PYTHON_COMPILER = $(PYTHON_COMPILER)
 	@echo PYTHON_EXECUTABLE = "$(PYTHON_EXECUTABLE)"
 	@echo PYTHON_VERSION = $(PYTHON_VERSION)
-	@echo PYTHON3 = $(PYTHON3)
-	@echo PYTHON_INC = $(PYTHON_INC)
-	@echo PYTHON_LNK = $(PYTHON_LNK)
-	@echo PYTHON_LDFLAGS = $(PYTHON_LDFLAGS)
-	@echo SWIG_BINARY = $(SWIG_BINARY)
-	@echo SWIG_INC = $(SWIG_INC)
-	@echo SWIG_PYTHON3_FLAG = $(SWIG_PYTHON3_FLAG)
-	@echo SWIG_PYTHON_LIB_SUFFIX = $(SWIG_PYTHON_LIB_SUFFIX)
-	@echo SET_PYTHONPATH = "$(SET_PYTHONPATH)"
-	@echo MYPY_OUT = "$(MYPY_OUT)"
 ifeq ($(SYSTEM),win)
 	@echo off & echo(
 else
diff --git a/makefiles/Makefile.third_party.unix.mk b/makefiles/Makefile.third_party.unix.mk
index 655b294a19..ef47a0bb8f 100644
--- a/makefiles/Makefile.third_party.unix.mk
+++ b/makefiles/Makefile.third_party.unix.mk
@@ -10,55 +10,12 @@ USE_SCIP ?= ON
 USE_GLPK ?= OFF
 PROTOC ?= $(OR_TOOLS_TOP)/bin/protoc
 
-# language targets
-BUILD_PYTHON ?= OFF
-BUILD_JAVA ?= OFF
-BUILD_DOTNET ?= OFF
-
-# Swig is only needed when building .Net, Java or Python wrapper
-UNIX_SWIG_BINARY ?= swig
-SWIG_BINARY = $(shell $(WHICH) $(UNIX_SWIG_BINARY))
-SWIG_DOXYGEN = -doxygen
-
-
 # Main target.
 .PHONY: third_party # Build OR-Tools Prerequisite
-third_party:  Makefile.local dependencies/Makefile
+third_party:  dependencies/Makefile
 
 THIRD_PARTY_TARGET = dependencies/Makefile
 
-######################
-##  Makefile.local  ##
-######################
-# Make sure that local file lands correctly across platforms
-Makefile.local: makefiles/Makefile.third_party.$(SYSTEM).mk
-	-$(DEL) Makefile.local
-	@echo Generating Makefile.local
-	@echo "# Define UNIX_SWIG_BINARY to use a custom version." >> Makefile.local
-	@echo "#   e.g. UNIX_SWIG_BINARY = /opt/swig-x.y.z/bin/swig" >> Makefile.local
-	@echo JAVA_HOME = $(JAVA_HOME)>> Makefile.local
-	@echo UNIX_PYTHON_VER = $(DETECTED_PYTHON_VERSION)>> Makefile.local
-	@echo >> Makefile.local
-	@echo "## OPTIONAL DEPENDENCIES ##" >> Makefile.local
-	@echo "# Define UNIX_CPLEX_DIR to use CPLEX" >> Makefile.local
-	@echo "#   e.g. UNIX_CPLEX_DIR = /opt/CPLEX_Studio-X.Y" >> Makefile.local
-	@echo >> Makefile.local
-	@echo "# Define UNIX_XPRESS_DIR to use XPRESS MP" >> Makefile.local
-	@echo "#   e.g. on Mac OS X: UNIX_XPRESS_DIR = /Applications/FICO\ Xpress/xpressmp" >> Makefile.local
-	@echo "#   e.g. on linux: UNIX_XPRESS_DIR = /opt/xpressmp" >> Makefile.local
-	@echo >> Makefile.local
-	@echo "# SCIP is enabled and built-in by default. To disable SCIP support" >> Makefile.local
-	@echo "# completely, uncomment the following line:">> Makefile.local
-	@echo "# USE_SCIP = OFF" >> Makefile.local
-	@echo >> Makefile.local
-	@echo "# Define UNIX_GLPK_DIR to point to a compiled version of GLPK to use it" >> Makefile.local
-	@echo "#   e.g. UNIX_GLPK_DIR = /opt/glpk-x.y.z" >> Makefile.local
-	@echo >> Makefile.local
-	@echo "# Coin OR solvers (CLP, CBC) are enabled and built-in by default." >> Makefile.local
-	@echo "# To disable Coin OR support completely, uncomment the following line:">> Makefile.local
-	@echo "# USE_COINOR = OFF" >> Makefile.local
-	@echo >> Makefile.local
-
 dependencies:
 	mkdir dependencies
 
@@ -105,5 +62,4 @@ ifdef UNIX_XPRESS_DIR
 	@echo XPRESS_INC = $(XPRESS_INC)
 	@echo XPRESS_LNK = $(XPRESS_LNK)
 endif
-	@echo SWIG_VERSION = $(SWIG_VERSION)
 	@echo
diff --git a/makefiles/Makefile.third_party.win.mk b/makefiles/Makefile.third_party.win.mk
index ba09a137cc..253d33b7fb 100644
--- a/makefiles/Makefile.third_party.win.mk
+++ b/makefiles/Makefile.third_party.win.mk
@@ -9,7 +9,6 @@ USE_COINOR ?= ON
 USE_SCIP ?= ON
 USE_GLPK ?= OFF
 PROTOC = "$(OR_TOOLS_TOP)\\bin\\protoc.exe"
-SWIG_BINARY = swig.exe
 
 # language targets
 BUILD_PYTHON ?= OFF
@@ -21,41 +20,10 @@ dependencies:
 	mkdir dependencies
 
 .PHONY: third_party # Build OR-Tools Prerequisite
-third_party: \
-  Makefile.local \
-  dependencies/ortools.sln | dependencies
+third_party: dependencies/ortools.sln | dependencies
 
 THIRD_PARTY_TARGET = dependencies/ortools.sln
 
-######################
-##  Makefile.local  ##
-######################
-# Make sure that local file lands correctly across platforms
-Makefile.local: makefiles/Makefile.third_party.$(SYSTEM).mk
-	-$(DEL) Makefile.local
-	@echo $(SELECTED_PATH_TO_PYTHON)>> Makefile.local
-	@echo # >> Makefile.local
-	@echo ## OPTIONAL DEPENDENCIES ## >> Makefile.local
-	@echo # Define WINDOWS_CPLEX_DIR to point to a installation directory of the CPLEX Studio >> Makefile.local
-	@echo #   e.g.: WINDOWS_CPLEX_DIR = C:\Progra~1\CPLEX_STUDIO2010\IBM\ILOG\CPLEX_STUDIO2010 >> Makefile.local
-	@echo # >> Makefile.local
-	@echo # Define WINDOWS_CPLEX_VERSION to specify the suffix of the library >> Makefile.local
-	@echo #   e.g.: WINDOWS_CPLEX_VERSION = 2010 >> Makefile.local
-	@echo # >> Makefile.local
-	@echo # Define WINDOWS_XPRESS_DIR to point to a installation directory of the XPRESS-MP >> Makefile.local
-	@echo #   e.g.: WINDOWS_XPRESS_DIR = C:\xpressmp>> Makefile.local
-	@echo # >> Makefile.local
-	@echo # SCIP is enabled and built-in by default. >> Makefile.local
-	@echo # To disable support, uncomment the following line: >> Makefile.local
-	@echo # USE_SCIP = OFF >> Makefile.local
-	@echo # >> Makefile.local
-	@echo # Coin OR solvers (CLP, CBC) are enabled and built-in by default. >> Makefile.local
-	@echo # To disable support, uncomment the following line: >> Makefile.local
-	@echo # USE_COINOR = OFF >> Makefile.local
-	@echo # >> Makefile.local
-	@echo # Define absolute paths without trailing "\". E.g. "C:\Foo\Bar" >> Makefile.local
-	@echo # Paths must be without spaces, try to use 'dir "directory*" /x' to get the shortname without space of each directory >> Makefile.local
-	@echo #   e.g. dir "%ProgramFiles%*" /x >> Makefile.local
 
 dependencies/ortools.sln: | dependencies
 	cmake -S . -B dependencies -DBUILD_DEPS=ON \
diff --git a/makefiles/Makefile.unix.mk b/makefiles/Makefile.unix.mk
index a22d9a4d5d..40d4494dfe 100644
--- a/makefiles/Makefile.unix.mk
+++ b/makefiles/Makefile.unix.mk
@@ -74,37 +74,14 @@ CMAKE := $(shell $(WHICH) cmake)
 ifeq ($(CMAKE),)
 $(error Please add "cmake" to your PATH)
 endif
-MVN_BIN := $(shell $(WHICH) mvn)
-
-# This is needed to find python.h
-PYTHON_VERSION = $(UNIX_PYTHON_VER)
-MAJOR_PYTHON_VERSION = $(shell python$(UNIX_PYTHON_VER) -c "from sys import version_info as v; print (str(v[0]))")
-MINOR_PYTHON_VERSION = $(shell python$(UNIX_PYTHON_VER) -c "from sys import version_info as v; print (str(v[1]))")
-
-PATH_TO_PYTHON_LIB = $(shell python$(UNIX_PYTHON_VER) -c 'import sysconfig; print (sysconfig.get_paths()["stdlib"])')
-PATH_TO_PYTHON_INCLUDE = $(shell python$(UNIX_PYTHON_VER) -c 'import sysconfig; print (sysconfig.get_paths()["platinclude"])')
-PYTHON_INC = -I$(PATH_TO_PYTHON_INCLUDE) -I$(PATH_TO_PYTHON_LIB) $(ADD_PYTHON_INC)
-
-PYTHON_INC += $(shell pkg-config --cflags python$(MAJOR_PYTHON_VERSION) 2> /dev/null)
 
 ifdef UNIX_CPLEX_DIR
   CPLEX_INC = -I$(UNIX_CPLEX_DIR)/cplex/include -DUSE_CPLEX
-  CPLEX_SWIG = $(CPLEX_INC)
 endif
 ifdef UNIX_XPRESS_DIR
   XPRESS_INC = -I$(UNIX_XPRESS_DIR)/include -DUSE_XPRESS -DXPRESS_PATH="$(UNIX_XPRESS_DIR)"
-  XPRESS_SWIG = $(XPRESS_INC)
 endif
 
-ifeq ($(PLATFORM),LINUX)
-  SWIG_INC = -DSWIGWORDSIZE64
-else
-  SWIG_INC =
-endif
-SWIG_INC += \
- -DUSE_GLOP -DUSE_BOP -DABSL_MUST_USE_RESULT \
- $(GLPK_SWIG) $(CPLEX_SWIG) $(XPRESS_INC)
-
 # Compilation flags
 DEBUG = -O4 -DNDEBUG
 JNIDEBUG = -O1 -DNDEBUG
@@ -129,14 +106,8 @@ ifeq ($(PLATFORM),LINUX)
   endif
 
   SYS_LNK = -lrt -lpthread -Wl,--no-as-needed -ldl
-  JAVA_INC = -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux
-  JAVAC_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/javac)
-  JAVA_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/java)
-  JAR_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/jar)
   JNI_LIB_EXT = so
 
-  SWIG_PYTHON_LIB_SUFFIX = so
-  SWIG_DOTNET_LIB_SUFFIX = so
   LINK_CMD = $(DYNAMIC_LD)
   PRE_LIB = -L$(OR_ROOT_FULL)/lib -l
   POST_LIB =
@@ -144,12 +115,6 @@ ifeq ($(PLATFORM),LINUX)
  -Wl,-rpath,'$$ORIGIN' \
  -Wl,-rpath,'$$ORIGIN/../lib'
 
-  PYTHON_LDFLAGS = \
- -Wl,-rpath,'$$ORIGIN' \
- -Wl,-rpath,'$$ORIGIN/../../ortools' \
- -Wl,-rpath,'$$ORIGIN/../../ortools/.libs' \
- -Wl,-rpath,'$$ORIGIN/../../../../lib'
-
 endif  # ifeq ($(PLATFORM),LINUX)
 ifeq ($(PLATFORM),MACOSX)
   MAC_VERSION = -mmacosx-version-min=$(MAC_MIN_VERSION)
@@ -177,14 +142,8 @@ ifeq ($(PLATFORM),MACOSX)
   SYS_LNK =
   SET_COMPILER = CXX="$(CCC)"
   SET_COIN_OPT = OPT_CXXFLAGS="-O1 -DNDEBUG" OPT_CFLAGS="-O1 -DNDEBUG"
-  JAVA_INC = -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/darwin
-  JAVAC_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/javac)
-  JAVA_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/java)
-  JAR_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/jar)
   JNI_LIB_EXT = dylib
 
-  SWIG_PYTHON_LIB_SUFFIX = so# To overcome a bug in Mac OS X loader.
-  SWIG_DOTNET_LIB_SUFFIX = dylib
   LINK_CMD = clang++ -dynamiclib $(MAC_VERSION) \
  -Wl,-search_paths_first \
  -Wl,-headerpad_max_install_names \
@@ -198,12 +157,6 @@ ifeq ($(PLATFORM),MACOSX)
  -Wl,-rpath,@loader_path/../lib \
  -Wl,-rpath,@loader_path/../dependencies/install/lib
   LDFLAGS = -install_name @rpath/$(LIB_PREFIX)ortools.$L #
-  PYTHON_LDFLAGS = \
- -Wl,-rpath,@loader_path \
- -Wl,-rpath,@loader_path/../../ortools \
- -Wl,-rpath,@loader_path/../../ortools/.libs \
- -Wl,-rpath,@loader_path/../../../../lib \
- -Wl,-rpath,@loader_path/../../../../dependencies/install/lib
 endif # ifeq ($(PLATFORM),MACOSX)
 
 DEPENDENCIES_INC = -I$(INC_DIR) -I$(SRC_DIR) -I$(GEN_DIR) \
@@ -217,3 +170,40 @@ DEPENDENCIES_LNK = $(GLPK_LNK) $(CPLEX_LNK) $(XPRESS_LNK)
 
 OR_TOOLS_LNK = $(PRE_LIB)ortools$(POST_LIB)
 OR_TOOLS_LDFLAGS = $(ZLIB_LNK) $(SYS_LNK) $(LINK_FLAGS)
+
+# language targets
+
+BUILD_PYTHON ?= ON
+ifeq ($(PYTHON_VERSION),)
+BUILD_PYTHON = OFF
+endif
+
+BUILD_JAVA ?= ON
+JAVAC_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/javac)
+JAVA_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/java)
+JAR_BIN = $(shell $(WHICH) $(JAVA_HOME)/bin/jar)
+MVN_BIN := $(shell $(WHICH) mvn)
+ifndef JAVAC_BIN
+BUILD_JAVA = OFF
+endif
+ifndef JAR_BIN
+BUILD_JAVA = OFF
+endif
+ifndef JAVA_BIN
+BUILD_JAVA = OFF
+endif
+ifndef MVN_BIN
+BUILD_JAVA = OFF
+endif
+
+BUILD_DOTNET ?= ON
+DOTNET := $(shell which dotnet)
+ifeq ($(DOTNET),)
+BUILD_DOTNET=OFF
+endif
+
+.PHONY detect_languages:
+detect_languages:
+	@echo BUILD_PYTHON = $(BUILD_PYTHON)
+	@echo BUILD_JAVA = $(BUILD_JAVA)
+	@echo BUILD_DOTNET = $(BUILD_DOTNET)
diff --git a/makefiles/Makefile.win.mk b/makefiles/Makefile.win.mk
index d132bc4ba1..09edb35be4 100644
--- a/makefiles/Makefile.win.mk
+++ b/makefiles/Makefile.win.mk
@@ -7,8 +7,6 @@ LIB_PREFIX =
 PRE_LIB = $(OR_ROOT)lib\\
 POST_LIB = .lib
 LIB_SUFFIX = lib
-SWIG_PYTHON_LIB_SUFFIX = dll
-SWIG_DOTNET_LIB_SUFFIX = dll
 JNI_LIB_EXT = dll
 STATIC_PRE_LIB = $(OR_ROOT)lib\\
 STATIC_POST_LIB = .lib
@@ -93,7 +91,7 @@ CMAKE := $(shell $(WHICH) cmake)
 ifeq ($(CMAKE),)
 $(error Please add "cmake" to your PATH)
 endif
-MVN_BIN := $(shell $(WHICH) mvn.cmd)
+
 
 # Add some additional macros
 ATTRIB = attrib
@@ -104,42 +102,26 @@ DEBUG=/O2 -DNDEBUG
 CCC=cl /std:c++20 /EHsc /MD /nologo -nologo $(SYSCFLAGS) /D__WIN32__ /DPSAPI_VERSION=1 \
  /DNOMINMAX /DWIN32_LEAN_AND_MEAN=1 /D_CRT_SECURE_NO_WARNINGS
 
-PYTHON_VERSION = $(WINDOWS_PYTHON_VERSION)
-PYTHON_INC=/I"$(WINDOWS_PATH_TO_PYTHON)\\include"
-PYTHON_LNK="$(WINDOWS_PATH_TO_PYTHON)\\libs\\python$(PYTHON_VERSION).lib"
-
 # This is needed to find GLPK include files and libraries.
 ifdef WINDOWS_GLPK_DIR
 GLPK_INC = /I"$(WINDOWS_GLPK_DIR)\\include" /DUSE_GLPK
-GLPK_SWIG = -I"$(WINDOWS_GLPK_DIR)/include" -DUSE_GLPK
 DYNAMIC_GLPK_LNK = "$(WINDOWS_GLPK_DIR)\\lib\\glpk.lib"
 STATIC_GLPK_LNK = "$(WINDOWS_GLPK_DIR)\\lib\\glpk.lib"
 endif
 # This is needed to find CPLEX include files and libraries.
 ifdef WINDOWS_CPLEX_DIR
   CPLEX_INC = /I"$(WINDOWS_CPLEX_DIR)\\cplex\\include" /DUSE_CPLEX
-  CPLEX_SWIG = -I"$(WINDOWS_CPLEX_DIR)/cplex/include" -DUSE_CPLEX
   STATIC_CPLEX_LNK = "$(WINDOWS_CPLEX_DIR)\\cplex\\lib\\x64_windows_msvc14\\stat_mda\\cplex$(WINDOWS_CPLEX_VERSION).lib"
   DYNAMIC_CPLEX_LNK = $(STATIC_CPLEX_LNK)
 endif
 ifdef WINDOWS_XPRESS_DIR
   XPRESS_INC = /I"$(WINDOWS_XPRESS_DIR)\\include" /DUSE_XPRESS /DXPRESS_PATH=\"$(WINDOWS_XPRESS_DIR)\"
-  XPRESS_SWIG = -I"$(WINDOWS_XPRESS_DIR)/include" -DUSE_XPRESS
   STATIC_XPRESS_LNK = "$(WINDOWS_XPRESS_DIR)\\lib\\xprs.lib"
   DYNAMIC_XPRESS_LNK = $(STATIC_XPRESS_LNK)
 endif
 
-SWIG_INC = \
- -DUSE_GLOP -DUSE_BOP -DABSL_MUST_USE_RESULT \
- $(GLPK_SWIG) $(GUROBI_SWIG) $(CPLEX_SWIG) $(XPRESS_SWIG)
-
 SYS_LNK = psapi.lib ws2_32.lib shlwapi.lib
 
-JAVA_INC=/I"$(JAVA_HOME)\\include" /I"$(JAVA_HOME)\\include\\win32"
-JAVAC_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\javac")
-JAVA_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\java")
-JAR_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\jar")
-
 DEPENDENCIES_INC = /I$(INC_DIR) /I$(SRC_DIR) /I$(GEN_DIR) \
  /DUSE_GLOP /DUSE_BOP \
  $(GLPK_INC) $(GUROBI_INC) $(CPLEX_INC) $(XPRESS_INC)
@@ -235,3 +217,41 @@ ABSL_LNK = \
 
 OR_TOOLS_LNK = $(PRE_LIB)ortools$(POST_LIB) $(DEPENDENCIES_LNK)
 OR_TOOLS_LDFLAGS =
+
+# language targets
+
+BUILD_PYTHON ?= ON
+ifeq ($(PYTHON_VERSION),)
+BUILD_PYTHON = OFF
+endif
+
+BUILD_JAVA ?= ON
+JAVAC_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\javac")
+JAVA_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\java")
+JAR_BIN=$(shell $(WHICH) "$(JAVA_HOME)\bin\jar")
+MVN_BIN := $(shell $(WHICH) mvn.cmd)
+ifndef JAVAC_BIN
+BUILD_JAVA = OFF
+endif
+ifndef JAR_BIN
+BUILD_JAVA = OFF
+endif
+ifndef JAVA_BIN
+BUILD_JAVA = OFF
+endif
+ifndef MVN_BIN
+BUILD_JAVA = OFF
+endif
+
+BUILD_DOTNET ?= ON
+DOTNET := $(shell $(WHICH) dotnet)
+ifeq ($(DOTNET),)
+BUILD_DOTNET=OFF
+endif
+
+.PHONY detect_languages:
+detect_languages:
+	@echo BUILD_PYTHON = $(BUILD_PYTHON)
+	@echo BUILD_JAVA = $(BUILD_JAVA)
+	@echo BUILD_DOTNET = $(BUILD_DOTNET)
+