Fixing the Linux build without breaking the Mac build

src/OpenGL/libEGL/BUILD.gn

@@ -69,7 +69,10 @@ shared_library("swiftshader_libEGL") {
     configs -= [ "//build/config/win:unicode" ]
     ldflags = [ "/DEF:" + rebase_path("libGLESv2.def", root_build_dir) ]
   } else if (is_linux) {
-    sources += [ "../../Main/libX11.cpp" ]
+    sources += [
+      "../../Main/libX11.cpp",
+      "TypeInfo.cpp",
+    ]
     ldflags =
         [ "-Wl,--version-script=" + rebase_path("exports.map", root_build_dir) ]
   }

src/OpenGL/libEGL/TypeInfo.cpp

+// Copyright 2017 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "common/Image.hpp"
+#include "Main/FrameBuffer.hpp"
+#include "Renderer/Surface.hpp"
+
+namespace sw
+{
+void FrameBuffer::typeinfo() {}
+void Surface::typeinfo() {}
+}
+
+namespace egl
+{
+void Image::typeinfo() {}
+}

src/OpenGL/libGLESv2/BUILD.gn

@@ -89,6 +89,7 @@ shared_library("swiftshader_libGLESv2") {
     configs -= [ "//build/config/win:unicode" ]
     ldflags = [ "/DEF:" + rebase_path("libGLESv2.def", root_build_dir) ]
   } else if (is_linux) {
+    sources += [ "TypeInfo.cpp" ]
     ldflags =
         [ "-Wl,--version-script=" + rebase_path("exports.map", root_build_dir) ]
   }

src/OpenGL/libGLESv2/TypeInfo.cpp

+// Copyright 2017 The SwiftShader Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "libEGL/Display.h"
+#include "libEGL/EGLSurface.h"
+
+namespace egl
+{
+void Surface::typeinfo() {}
+void Display::typeinfo() {}
+}