Added --help/-h and --version/-V. So, this is version 0.2.0 of Fun! :)

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.16)
-project(fun C)
+project(fun VERSION 0.2.0 LANGUAGES C)
 
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
@@ -30,6 +30,8 @@ endif()
 add_executable(fun
         src/fun.c
 )
+# Provide version string to the CLI
+target_compile_definitions(fun PRIVATE FUN_VERSION=\"${PROJECT_VERSION}\")
 target_link_libraries(fun PRIVATE fun_core)
 
 # Internal test programs
@@ -48,7 +50,7 @@ add_custom_target(clean-build
         COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target clean
         COMMENT "Clean build outputs (objects, binaries) in the build directory"
 )
-add_custom_target(dist-clean
+add_custom_target(distclean
         COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target clean
         COMMAND ${CMAKE_COMMAND} -E rm -rf
         ${CMAKE_BINARY_DIR}/CMakeCache.txt

Makefile

@@ -1,28 +1,50 @@
-all:
-	make clean
-	make fun
-	make fun_test
-	make test_opcodes
+# Simple Makefile wrapper around CMake
 
-fun:
-	cmake -S . -B build -DFUN_DEBUG=ON
-	cmake --build build --target fun
+BUILD_DIR ?= build
+CMAKE ?= cmake
+# Default to a debug build with extra logging enabled
+CMAKE_FLAGS ?= -DFUN_DEBUG=ON
 
-fun_test:
-	cmake -S . -B build -DFUN_DEBUG=ON
-	cmake --build build --target fun_test
+.PHONY: all configure build fun fun_test test_opcodes clean distclean install repl run
 
+all: clean fun fun_test test_opcodes
+
+# One-time configure (re-runs harmlessly)
+configure:
+	$(CMAKE) -S . -B $(BUILD_DIR) $(CMAKE_FLAGS)
+
+# Build aggregate
+build: configure
+	$(CMAKE) --build $(BUILD_DIR)
+
+fun: configure
+	$(CMAKE) --build $(BUILD_DIR) --target fun
+
+fun_test: configure
+	$(CMAKE) --build $(BUILD_DIR) --target fun_test
+
+test_opcodes: configure
+	$(CMAKE) --build $(BUILD_DIR) --target test_opcodes
+
+# Clean via CMake (if configured)
 clean:
-	cmake --build build --target clean-build
+	$(CMAKE) --build $(BUILD_DIR) --target clean || true
 
-# Or set a custom prefix: cmake --install build --prefix "$HOME/.local"
-# Defaults:
-# Binary: /usr/bin/fun
-# Docs: /share/doc/fun/README.md, LICENSE
-# Examples: /share/fun/examples/*.fun
+# Full clean: remove the build directory entirely
+distclean:
+	$(CMAKE) --build $(BUILD_DIR) --target distclean || true
+
+# Install to fixed paths defined in CMake (may require sudo):
+# - Binary   : /usr/bin/fun
+# - Examples : /usr/share/fun/examples/*.fun
+# - Docs     : /usr/share/doc/fun/README.md, LICENSE
 install:
-	cmake --install build
+	$(CMAKE) --install $(BUILD_DIR)
 
-test_opcodes:
-	cmake -S . -B build -DFUN_DEBUG=ON
-	cmake --build build --target test_opcodes
+# Convenience: run REPL
+repl: fun
+	./$(BUILD_DIR)/fun
+
+# Convenience: run a script (usage: make run SCRIPT=examples/strings_test.fun)
+run: fun
+	./$(BUILD_DIR)/fun $(SCRIPT)

src/fun.c

@@ -6,6 +6,10 @@
 #include <string.h>
 #include <stdlib.h>
 
+#ifndef FUN_VERSION
+#define FUN_VERSION "0.0.0-dev"
+#endif
+
 static int is_blank_line(const char *s) {
     for (const char *p = s; *p; ++p) {
         if (*p != ' ' && *p != '\t' && *p != '\r' && *p != '\n') return 0;
@@ -13,10 +17,33 @@ static int is_blank_line(const char *s) {
     return 1;
 }
 
+static void print_usage(const char *prog) {
+    printf("Fun %s\n", FUN_VERSION);
+    printf("Usage:\n");
+    printf("  %s [script.fun]\n", prog ? prog : "fun");
+    printf("  %s --help | -h\n", prog ? prog : "fun");
+    printf("  %s --version | -V\n", prog ? prog : "fun");
+    printf("\n");
+    printf("When no script is provided, a REPL starts. Submit an empty line to execute the buffer.\n");
+}
+
 int main(int argc, char **argv) {
     VM vm;
     vm_init(&vm);
 
+    // CLI flags
+    if (argc > 1) {
+        const char *arg = argv[1];
+        if (strcmp(arg, "--help") == 0 || strcmp(arg, "-h") == 0) {
+            print_usage(argv[0]);
+            return 0;
+        }
+        if (strcmp(arg, "--version") == 0 || strcmp(arg, "-V") == 0) {
+            printf("Fun %s\n", FUN_VERSION);
+            return 0;
+        }
+    }
+
     // If a script path is provided, parse and run it
     if (argc > 1) {
         const char *path = argv[1];