Add native Windows build of meshtasticd (#11031)

variants/native/portduino/platformio.ini

@@ -251,6 +251,83 @@ build_flags = ${env:native-macos.build_flags}
 build_src_filter = ${env:native-macos.build_src_filter}
 lib_ignore = ${env:native-macos.lib_ignore}
 
+; ---------------------------------------------------------------------------
+; Native build for Windows (x86_64) via the MSYS2 UCRT64 MinGW-w64 toolchain.
+; Headless meshtasticd.exe running in SimRadio mode (`-s`). No BlueZ, libgpiod or
+; Linux I2C, and no UDP multicast: the framework's AsyncUDP.cpp is BSD sockets,
+; so HAS_UDP_MULTICAST stays unset here as it does on macOS.
+;
+; MSVC is not an option: platform-native's builder calls env.Tool("gcc") and the
+; firmware builds as gnu17/gnu++17 with GNU extensions throughout.
+;
+; Prerequisites (MSYS2, https://www.msys2.org/):
+;   pacman -S --needed mingw-w64-ucrt-x86_64-{gcc,pkgconf,yaml-cpp,libuv,jsoncpp,openssl,libusb}
+;
+; argp is not packaged for MSYS2's mingw environments (msys/libargp links the
+; msys-2.0.dll emulation layer and can't be used for a native binary), yet
+; Arduino.h includes <argp.h> and main.cpp calls argp_parse(). Build it once from
+; source, the same dependency macOS meets with `brew install argp-standalone`:
+;   git clone https://github.com/tom42/argp-standalone
+;   cd argp-standalone && cmake -G Ninja -B build -DCMAKE_BUILD_TYPE=Release .
+;   cmake --build build
+;   cp include/argp-standalone/argp.h /ucrt64/include/argp.h   ; ships no install() rules
+;   cp build/src/libargp-standalone.a /ucrt64/lib/libargp.a
+;
+; Build from any shell with /ucrt64/bin on PATH:
+;   pio run -e native-windows
+;   .pio/build/native-windows/meshtasticd.exe -s
+; ---------------------------------------------------------------------------
+[env:native-windows]
+extends = native_base
+build_flags = ${portduino_base.build_flags_common}
+  -I variants/native/portduino
+  ; Our drop-in libpinedio-usb.h, replacing the libusb one: libusb can only reach
+  ; a device bound to WinUSB, which means Zadig on every machine. See
+  ; src/platform/portduino/windows/libpinedio_ch341dll.c.
+  -I src/platform/portduino/windows/include
+  -largp
+  -lws2_32 ; GpsdSerial.cpp's TCP client
+  -lbcrypt ; BCryptGenRandom() in HardwareRNG.cpp
+  -liphlpapi ; GetAdaptersAddresses() host-MAC fallback in PortduinoGlue.cpp
+  ; libch341's libpinedio-usb.h pulls in libusb.h and so <windows.h>, which
+  ; collides with the Arduino API: winuser.h's `typedef struct tagINPUT INPUT` vs
+  ; the PinMode enumerator, and rpcndr.h's `typedef unsigned char boolean` vs
+  ; Arduino's `typedef bool boolean`. NOUSER and WIN32_LEAN_AND_MEAN keep those
+  ; headers out, NOMINMAX stops min/max being macroed over std::min/std::max.
+  -DWIN32_LEAN_AND_MEAN
+  -DNOMINMAX
+  -DNOUSER
+  -DNOGDI
+  ; yaml-cpp declares its API __declspec(dllimport) unless told the link is
+  ; static, leaving every YAML symbol undefined as __imp_*.
+  -DYAML_CPP_STATIC_DEFINE
+  ; Headless: variant.h would otherwise default HAS_SCREEN to 1 and pull in the
+  ; screen renderer; EXCLUDE_SCREEN gates the `screen->...` hooks in the sensors.
+  -DHAS_SCREEN=0
+  -DMESHTASTIC_EXCLUDE_SCREEN=1
+  !pkg-config --cflags --libs openssl --silence-errors || :
+build_unflags =
+  -fPIC ; ignored on Windows, where all code is position-independent
+; Static link, so meshtasticd.exe stands alone and can't be hijacked by a stray
+; System32 DLL. PlatformIO only feeds build_flags to the compile step, hence the script.
+extra_scripts =
+  ${env.extra_scripts}
+  post:extra_scripts/windows_link_flags.py
+; LinuxInput drives evdev; Panel_sdl/TFTDisplay pull LovyanGFX. Neither is needed
+; for the headless build.
+build_src_filter = ${native_base.build_src_filter}
+  -<input/LinuxInput.cpp>
+  -<input/LinuxInputImpl.cpp>
+  -<graphics/Panel_sdl.cpp>
+  -<graphics/TFTDisplay.cpp>
+; LovyanGFX includes <malloc.h> and is only needed by the TFT variants. The pine64
+; libch341 is the libusb backend that libpinedio_ch341dll.c replaces; keeping both
+; would duplicate every pinedio_* symbol.
+lib_ignore =
+  ${portduino_base.lib_ignore}
+  LovyanGFX
+  Pine libch341-spi Userspace library
+
 ; ---------------------------------------------------------------------------
 ; WASM (Emscripten) - the portduino node compiled to WebAssembly, driving a real
 ; LoRa radio over WebUSB through a CH341 (src/platform/portduino/wasm/). The same