init

engines/c/Makefile

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+# engines/c/Makefile
+# 跨平台编译：make         → 本地系统编译
+#              make linux  → Linux 交叉编译（需 x86_64-linux-gnu-gcc）
+#              make windows → Windows 交叉编译（需 x86_64-w64-mingw32-gcc）
+#              make macos  → macOS 交叉编译（需 osxcross 工具链）
+
+CC        = gcc
+CFLAGS    = -O3 -march=native -Wall -Wextra
+LDFLAGS   = -lm
+SRCS      = main.c
+
+# 自动检测系统
+UNAME_S  := $(shell uname -s 2>/dev/null || echo Windows)
+
+# 目标文件名：统一使用 .exe 后缀（方便 Python 跨平台调用）
+TARGET    = build/dynamics_c.exe
+
+# ── 本地编译 ─────────────────────────────────
+.PHONY: all clean linux windows macos
+
+all: $(TARGET)
+
+$(TARGET): $(SRCS) | build
+	$(CC) $(CFLAGS) -o $@ $(SRCS) $(LDFLAGS)
+	@echo "  === C engine built: $@ ==="
+
+build:
+	mkdir -p build
+
+# ── 交叉编译 ─────────────────────────────────
+# Linux → Linux (x86_64)
+linux: CROSS_PREFIX = x86_64-linux-gnu-
+linux: CC = $(CROSS_PREFIX)gcc
+linux: CFLAGS = -O3 -march=x86-64 -Wall -Wextra
+linux: $(SRCS) | build
+	$(CC) $(CFLAGS) -o build/dynamics_c_linux.exe $(SRCS) $(LDFLAGS)
+	@echo "  === Linux binary: build/dynamics_c_linux.exe ==="
+
+# 任意平台 → Windows (x86_64)
+# 需要安装 MinGW 交叉编译器：
+#   apt install mingw-w64 (Debian/Ubuntu)
+#   brew install mingw-w64 (macOS)
+windows: CROSS_PREFIX = x86_64-w64-mingw32-
+windows: CC = $(CROSS_PREFIX)gcc
+windows: CFLAGS = -O3 -march=x86-64 -Wall -Wextra
+windows: $(SRCS) | build
+	$(CC) $(CFLAGS) -o build/dynamics_c_win.exe $(SRCS) $(LDFLAGS)
+	@echo "  === Windows binary: build/dynamics_c_win.exe ==="
+
+# 任意平台 → macOS (x86_64)
+# 需要安装 osxcross 工具链
+macos: CROSS_PREFIX = x86_64-apple-darwin-
+macos: CC = $(CROSS_PREFIX)gcc
+macos: CFLAGS = -O3 -march=x86-64 -Wall -Wextra
+macos: $(SRCS) | build
+	$(CC) $(CFLAGS) -o build/dynamics_c_mac.exe $(SRCS) $(LDFLAGS)
+	@echo "  === macOS binary: build/dynamics_c_mac.exe ==="
+
+# ── 编译所有平台 ──────────────────────────────
+all-platforms: linux windows macos
+
+clean:
+	rm -rf build *.o