refactor: move meta and random modules from vm and cli into new aux library category

Restructure module hierarchy by extracting meta and random from the core VM and CLI-specific modules into a new "aux" (auxiliary) directory. This introduces WREN_AUX_META and WREN_AUX_RANDOM configuration flags, updates include paths and build system to compile aux sources separately, removes random module registration from CLI modules.c, and adjusts the VM's module loading to implicitly import core into all modules regardless of name.

util/wren.mk

@@ -19,6 +19,9 @@
 # Then, for the libraries, the correct extension is added.
 
 # Files.
+AUX_HEADERS := $(wildcard src/aux/*.h) $(wildcard src/aux/*.wren.inc)
+AUX_SOURCES := $(wildcard src/aux/*.c)
+
 CLI_HEADERS  := $(wildcard src/cli/*.h)
 CLI_SOURCES  := $(wildcard src/cli/*.c)
 
@@ -106,6 +109,7 @@ endif
 
 CFLAGS := $(C_OPTIONS) $(C_WARNINGS)
 
+AUX_OBJECTS    := $(addprefix $(BUILD_DIR)/aux/, $(notdir $(AUX_SOURCES:.c=.o)))
 CLI_OBJECTS    := $(addprefix $(BUILD_DIR)/cli/, $(notdir $(CLI_SOURCES:.c=.o)))
 MODULE_OBJECTS := $(addprefix $(BUILD_DIR)/module/, $(notdir $(MODULE_SOURCES:.c=.o)))
 VM_OBJECTS     := $(addprefix $(BUILD_DIR)/vm/, $(notdir $(VM_SOURCES:.c=.o)))
@@ -134,26 +138,27 @@ cli: bin/$(WREN)
 test: $(BUILD_DIR)/test/$(WREN)
 
 # Command-line interpreter.
-bin/$(WREN): $(CLI_OBJECTS) $(MODULE_OBJECTS) $(VM_OBJECTS) $(LIBUV)
+bin/$(WREN): $(AUX_OBJECTS) $(CLI_OBJECTS) $(MODULE_OBJECTS) $(VM_OBJECTS) \
+		$(LIBUV)
 	@ printf "%10s %-30s %s\n" $(CC) $@ "$(C_OPTIONS)"
 	@ mkdir -p bin
 	@ $(CC) $(CFLAGS) $^ -o $@ -lm $(LIBUV_LIBS)
 
 # Static library.
-lib/lib$(WREN).a: $(VM_OBJECTS)
+lib/lib$(WREN).a: $(AUX_OBJECTS) $(VM_OBJECTS)
 	@ printf "%10s %-30s %s\n" $(AR) $@ "rcu"
 	@ mkdir -p lib
 	@ $(AR) rcu $@ $^
 
 # Shared library.
-lib/lib$(WREN).$(SHARED_EXT): $(VM_OBJECTS)
+lib/lib$(WREN).$(SHARED_EXT): $(AUX_OBJECTS) $(VM_OBJECTS)
 	@ printf "%10s %-30s %s\n" $(CC) $@ "$(C_OPTIONS) $(SHARED_LIB_FLAGS)"
 	@ mkdir -p lib
 	@ $(CC) $(CFLAGS) -shared $(SHARED_LIB_FLAGS) -o $@ $^
 
 # Test executable.
-$(BUILD_DIR)/test/$(WREN): $(TEST_OBJECTS) $(MODULE_OBJECTS) $(VM_OBJECTS) \
-		$(BUILD_DIR)/cli/modules.o $(BUILD_DIR)/cli/vm.o $(LIBUV)
+$(BUILD_DIR)/test/$(WREN): $(AUX_OBJECTS) $(MODULE_OBJECTS) $(TEST_OBJECTS) \
+		$(VM_OBJECTS) $(BUILD_DIR)/cli/modules.o $(BUILD_DIR)/cli/vm.o $(LIBUV)
 	@ printf "%10s %-30s %s\n" $(CC) $@ "$(C_OPTIONS)"
 	@ mkdir -p $(BUILD_DIR)/test
 	@ $(CC) $(CFLAGS) $^ -o $@ -lm $(LIBUV_LIBS)
@@ -172,14 +177,21 @@ $(BUILD_DIR)/module/%.o: src/module/%.c $(CLI_HEADERS) $(MODULE_HEADERS) \
 	@ mkdir -p $(BUILD_DIR)/module
 	@ $(CC) -c $(CFLAGS) $(CLI_FLAGS) -o $@ $(FILE_FLAG) $<
 
+# Aux object files.
+$(BUILD_DIR)/aux/%.o: src/aux/%.c $(VM_HEADERS) $(AUX_HEADERS)
+	@ printf "%10s %-30s %s\n" $(CC) $< "$(C_OPTIONS)"
+	@ mkdir -p $(BUILD_DIR)/aux
+	@ $(CC) -c $(CFLAGS) -Isrc/include -Isrc/vm -o $@ $(FILE_FLAG) $<
+
 # VM object files.
 $(BUILD_DIR)/vm/%.o: src/vm/%.c $(VM_HEADERS)
 	@ printf "%10s %-30s %s\n" $(CC) $< "$(C_OPTIONS)"
 	@ mkdir -p $(BUILD_DIR)/vm
-	@ $(CC) -c $(CFLAGS) -Isrc/include -o $@ $(FILE_FLAG) $<
+	@ $(CC) -c $(CFLAGS) -Isrc/include -Isrc/aux -Isrc/vm -o $@ $(FILE_FLAG) $<
 
 # Test object files.
-$(BUILD_DIR)/test/%.o: test/api/%.c $(MODULE_HEADERS) $(VM_HEADERS) $(TEST_HEADERS) $(LIBUV)
+$(BUILD_DIR)/test/%.o: test/api/%.c $(AUX_HEADERS) $(MODULE_HEADERS) \
+		 $(VM_HEADERS) $(TEST_HEADERS) $(LIBUV)
 	@ printf "%10s %-30s %s\n" $(CC) $< "$(C_OPTIONS)"
 	@ mkdir -p $(dir $@)
 	@ $(CC) -c $(CFLAGS) $(CLI_FLAGS) -o $@ $(FILE_FLAG) $<
@@ -193,6 +205,9 @@ $(LIBUV): $(LIBUV_DIR)/build/gyp/gyp util/libuv.py
 	@ ./util/libuv.py build $(LIBUV_ARCH)
 
 # Wren modules that get compiled into the binary as C strings.
+src/aux/wren_aux_%.wren.inc: src/aux/wren_aux_%.wren util/wren_to_c_string.py
+	@ ./util/wren_to_c_string.py $@ $<
+
 src/vm/wren_%.wren.inc: builtin/%.wren util/wren_to_c_string.py
 	@ ./util/wren_to_c_string.py $@ $<