finally fix gcc building fully

dom/canvas/WebGLContext.cpp

@@ -843,9 +843,11 @@ WebGLContext::ThrowEvent_WebGLContextCreationError(const nsACString& text)
 }
 
 NS_IMETHODIMP
-WebGLContext::InitializeWithDrawTarget(nsIDocShell*,
-                                       NotNull<gfx::DrawTarget*>)
+WebGLContext::InitializeWithDrawTarget(nsIDocShell* aDocShell,
+                                       NotNull<gfx::DrawTarget*> aTarget)
 {
+    (void)aDocShell;
+    (void)aTarget;
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 

dom/canvas/WebGLContext_mingw_compat.cpp

@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#if defined(__MINGW32__) && defined(__i386__)
+
+#include "WebGLContext.h"
+
+namespace mozilla {
+
+extern "C" nsresult __attribute__((stdcall))
+WebGLContext_InitializeWithDrawTarget_stdcall(
+    WebGLContext* self,
+    nsIDocShell* aDocShell,
+    NotNull<gfx::DrawTarget*> aDrawTarget)
+    __asm__("__ZN7mozilla12WebGLContext24InitializeWithDrawTargetEP11nsIDocShellNS_7NotNullIPNS_3gfx10DrawTargetEEE@12");
+
+extern "C" nsresult __attribute__((stdcall))
+WebGLContext_InitializeWithDrawTarget_stdcall(
+    WebGLContext* self,
+    nsIDocShell* aDocShell,
+    NotNull<gfx::DrawTarget*> aDrawTarget)
+{
+  return self->WebGLContext::InitializeWithDrawTarget(aDocShell, aDrawTarget);
+}
+
+}  // namespace mozilla
+
+#endif

dom/canvas/moz.build

@@ -57,6 +57,11 @@ SOURCES += [
     'ImageUtils.cpp',
 ]
 
+if CONFIG['GNU_CC'] and CONFIG['CPU_ARCH'] == 'x86' and CONFIG['OS_ARCH'] == 'WINNT':
+    SOURCES += [
+        'WebGLContext_mingw_compat.cpp',
+    ]
+
 # WebGL Sources
 UNIFIED_SOURCES += [
     'TexUnpackBlob.cpp',
@@ -79,7 +84,6 @@ UNIFIED_SOURCES += [
     'WebGL2ContextVertices.cpp',
     'WebGLActiveInfo.cpp',
     'WebGLBuffer.cpp',
-    'WebGLContext.cpp',
     'WebGLContextBuffers.cpp',
     'WebGLContextDraw.cpp',
     'WebGLContextExtensions.cpp',
@@ -151,6 +155,7 @@ UNIFIED_SOURCES += [
 
 SOURCES += [
     'MurmurHash3.cpp',
+    'WebGLContext.cpp',
 ]
 
 # Suppress warnings from third-party code.