Misc: Purge unused definitions

src/CMakeLists.txt

@@ -1,16 +1,9 @@
-if(BUILD_LIBRETRO_CORE)
-  add_definitions("-DLIBRETRO=1")
-endif()
-
 add_subdirectory(common)
 add_subdirectory(core)
 add_subdirectory(scmversion)
-
-if(NOT BUILD_LIBRETRO_CORE)
 add_subdirectory(frontend-common)
-endif()
 
-if(NOT BUILD_LIBRETRO_CORE AND NOT ANDROID)
+if(NOT ANDROID)
   add_subdirectory(common-tests)
   if(WIN32)
     add_subdirectory(updater)
@@ -25,10 +18,6 @@ if(BUILD_QT_FRONTEND)
   add_subdirectory(duckstation-qt)
 endif()
 
-if(BUILD_LIBRETRO_CORE)
-  add_subdirectory(duckstation-libretro)
-endif()
-
 if(BUILD_REGTEST)
   add_subdirectory(duckstation-regtest)
 endif()

src/common/CMakeLists.txt

@@ -146,20 +146,15 @@ if(WIN32)
     d3d11/stream_buffer.h
     d3d11/texture.cpp
     d3d11/texture.h
-    windows_headers.h
-  )
-  target_link_libraries(common PRIVATE d3dcompiler.lib)
-
-  if(NOT LIBRETRO)
-    target_sources(common PRIVATE
     gl/context_wgl.cpp
     gl/context_wgl.h
     thirdparty/StackWalker.cpp
     thirdparty/StackWalker.h
     win32_progress_callback.cpp
     win32_progress_callback.h
+    windows_headers.h
   )
-  endif()
+  target_link_libraries(common PRIVATE d3dcompiler.lib)
 endif()
 
 if(ANDROID)
@@ -245,9 +240,6 @@ endif()
 if(APPLE)
   # Needed for Vulkan Swap Chain.
   target_link_libraries(common PRIVATE "objc")
-endif()
-
-if(APPLE AND NOT BUILD_LIBRETRO_CORE)
   target_sources(common PRIVATE
     gl/context_agl.mm
     gl/context_agl.h

src/common/memory_arena.cpp

@@ -113,15 +113,7 @@ static std::string GetFileMappingName()
 #error Unknown platform.
 #endif
 
-#ifdef LIBRETRO
-  // libretro second-instance runahead is insane, and loads a second copy of the module in the same process, which means
-  // we'd overlap the memory mapping for the "primary" core. Work around this by taking the address of this function,
-  // which should be unique per instance.
-  std::string ret(StringUtil::StdStringFromFormat("duckstation_%u_%p", pid, ((void*)&GetFileMappingName)));
-#else
-  std::string ret(StringUtil::StdStringFromFormat("duckstation_%u", pid));
-#endif
-
+  const std::string ret(StringUtil::StdStringFromFormat("duckstation_%u", pid));
   Log_InfoPrintf("File mapping name: %s", ret.c_str());
   return ret;
 }

src/common/vulkan/shader_compiler.cpp

@@ -124,9 +124,7 @@ bool InitializeGlslang()
     return false;
   }
 
-#ifndef LIBRETRO
   std::atexit([]() { glslang::FinalizeProcess(); });
-#endif
 
   glslang_initialized = true;
   return true;

src/common/window_info.h

@@ -14,7 +14,6 @@ struct WindowInfo
     MacOS,
     Android,
     Display,
-    Libretro,
   };
 
   enum class SurfaceFormat