libmingw32.a(lib64_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup 0x2e): undefined reference to `WinMain'

解决方案：

• 将main函数入口改为WinMain入口即可
• cmake带参数：-DCMAKE_EXE_LINKER_FLAGS="-lmingw32"