From b1c8a4085319ff5433da3868c5784fbecb2c8f6b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= <rverschelde@gmail.com>
Date: Sun, 5 Mar 2023 18:16:06 +0100
Subject: [PATCH] Windows: Workaround missing DWRITE_FONT_WEIGHT value in old
 MinGW

Fixes #74339.

(cherry picked from commit b7ecb9584a1fc141d70140f6b0e573d870fa0dcb)
---
 SConstruct                      | 2 +-
 platform/windows/os_windows.cpp | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/SConstruct b/SConstruct
index 2763f3f578f..8b39f120b4b 100644
--- a/SConstruct
+++ b/SConstruct
@@ -645,7 +645,7 @@ if selected_platform in platform_list:
             print(
                 "Detected mingw version is not using posix threads. Only posix "
                 "version of mingw is supported. "
-                'Use "update-alternatives --config <platform>-w64-mingw32-[gcc|g++]" '
+                'Use "update-alternatives --config x86_64-w64-mingw32-g++" '
                 "to switch to posix threads."
             )
             Exit(255)
diff --git a/platform/windows/os_windows.cpp b/platform/windows/os_windows.cpp
index 91d2d1e9965..6e219fb9299 100644
--- a/platform/windows/os_windows.cpp
+++ b/platform/windows/os_windows.cpp
@@ -69,6 +69,11 @@ __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
 #define WM_POINTERUPDATE 0x0245
 #endif
 
+// Missing in MinGW headers before 8.0.
+#ifndef DWRITE_FONT_WEIGHT_SEMI_LIGHT
+#define DWRITE_FONT_WEIGHT_SEMI_LIGHT (DWRITE_FONT_WEIGHT)350
+#endif
+
 #if defined(__GNUC__)
 // Workaround GCC warning from -Wcast-function-type.
 #define GetProcAddress (void *)GetProcAddress