chore(makefile): apply fixes to original makefile

lua/nvim-treesitter/shell_command_selectors.lua

@@ -113,7 +113,7 @@ function M.select_compile_command(repo, cc, compile_location)
         args = {
           "--makefile=" .. utils.join_path(utils.get_package_path(), "scripts", "compile_parsers.makefile"),
           "CC=" .. cc,
-          "CXX_STANDARD=" .. (repo.cxx_standard or 'c++14'),
+          "CXX_STANDARD=" .. (repo.cxx_standard or "c++14"),
         },
         cwd = compile_location,
       },

scripts/compile_parsers.makefile

@@ -1,13 +1,51 @@
-CC?=cc
-CXX_STANDARD?=c++14
+CFLAGS       ?= -Os -std=c99 -fPIC
+CXXFLAGS     ?= -Os -std=c++14 -fPIC
+LDFLAGS      ?= 
+SRC_DIR      ?= ./src
+DEST_DIR     ?= ./dest
 
-all: parser.so
+ifeq ($(OS),Windows_NT)
+   SHELL       := powershell.exe
+   .SHELLFLAGS := -NoProfile -command
+   CP          := Copy-Item -Recurse -ErrorAction SilentlyContinue
+   MKDIR       := New-Item -ItemType directory -ErrorAction SilentlyContinue
+   TARGET      := parser.dll
+   rmf         = Write-Output $(1) | foreach { if (Test-Path $$_) { Remove-Item -Force } }
+else
+   CP          := cp
+   MKDIR       := mkdir -p
+   TARGET      := parser.so
+   rmf         = rm -rf $(1)
+endif
 
-parser.o: src/parser.c
-	$(CC) -c src/parser.c -std=c99 -Os -fPIC -I./src
+ifneq ($(wildcard $(SRC_DIR)/*.cc),)
+   LDFLAGS += -lstdc++
+endif
 
-scanner.o: src/scanner.cc
-	$(CC) -c src/scanner.cc -std=$(CXX_STANDARD) -Os -fPIC -I./src
+OBJECTS := parser.o
 
-parser.so: parser.o scanner.o
-	$(CC) parser.o scanner.o -o parser.so -shared -lstdc++
+ifneq ($(wildcard $(SRC_DIR)/scanner.*),)
+   OBJECTS += scanner.o
+endif
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+	$(CC) $(OBJECTS) -o $(TARGET) -shared $(LDFLAGS)
+
+%.o: $(SRC_DIR)/%.c
+	$(CC) -c $(CFLAGS) -I$(SRC_DIR) -o $@ $<
+
+%.o: $(SRC_DIR)/%.cc
+	$(CC) -c $(CXXFLAGS) -I$(SRC_DIR) -o $@ $<
+
+clean:
+	$(call rmf,$(TARGET) $(OBJECTS))
+
+$(DEST_DIR):
+	@$(MKDIR) $(DEST_DIR)
+
+install: $(TARGET) $(DEST_DIR)
+	$(CP) $(TARGET) $(DEST_DIR)/
+
+.PHONY: clean