From 99247910b940e4f47728c3c73984c393d1dd48d5 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Mon, 19 Nov 2018 16:12:14 +0100
Subject: [PATCH] Declare SHDefExtractIcon() if it's missing from (MinGW)
 headers

At least the MinGW 5.3 used for AppVeyor builds doesn't declare this
function, so provide its declaration ourselves to fix MinGW build after
the recent changes.
---
 src/msw/artmsw.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/msw/artmsw.cpp b/src/msw/artmsw.cpp
index 0d49683846..514912d86e 100644
--- a/src/msw/artmsw.cpp
+++ b/src/msw/artmsw.cpp
@@ -31,6 +31,27 @@
     #define wxHAS_SHGetStockIconInfo
 #endif
 
+// MinGW headers don't always define this symbol (up to at least 5.3 version),
+// so do it ourselves.
+//
+// Note that at least there is no need for run-time loading here, as it's
+// available since XP.
+#ifndef SHDefExtractIcon
+
+#ifdef UNICODE
+extern "C" HRESULT wxSTDCALL
+SHDefExtractIconW(LPCWSTR pszIconFile, int iIndex, UINT uFlags,
+                  HICON *phiconLarge, HICON *phiconSmall, UINT nIconSize);
+#define SHDefExtractIcon SHDefExtractIconW
+#else // !UNICODE
+extern "C" HRESULT wxSTDCALL
+SHDefExtractIconA(LPCSTR pszIconFile, int iIndex, UINT uFlags,
+                  HICON *phiconLarge, HICON *phiconSmall, UINT nIconSize);
+#define SHDefExtractIcon SHDefExtractIconA
+#endif // UNICODE/!UNICODE
+
+#endif // !defined(SHDefExtractIcon)
+
 namespace
 {