Additional assurance against accidental inclusion of default_keys.h

src/core/CMakeLists.txt

@@ -464,7 +464,6 @@ add_library(citra_core STATIC
     hw/aes/key.h
     hw/ecc.cpp
     hw/ecc.h
-    hw/default_keys.h
     hw/rsa/rsa.cpp
     hw/rsa/rsa.h
     hw/unique_data.cpp
@@ -502,6 +501,10 @@ add_library(citra_core STATIC
     tracer/recorder.h
 )
 
+if (ENABLE_BUILTIN_KEYBLOB)
+    target_sources(citra_core PRIVATE hw/default_keys.h)
+endif()
+
 create_target_directory_groups(citra_core)
 
 target_link_libraries(citra_core PUBLIC citra_common PRIVATE audio_core network video_core)

src/core/hw/default_keys.h

@@ -2,6 +2,12 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma once
+
+#ifndef ENABLE_BUILTIN_KEYBLOB
+#error Attempting to include default_keys.h, but ENABLE_BUILTIN_KEYBLOB is disabled.
+#endif
+
 unsigned char default_keys_enc[] = {
     0x4E, 0x81, 0xE9, 0x54, 0xCC, 0xDE, 0xFD, 0x56, 0x7D, 0xD2, 0x72, 0xE6, 0xD9, 0xCD, 0x8E, 0x11,
     0xE1, 0x7F, 0x74, 0xF4, 0xFC, 0x54, 0xA6, 0xA4, 0x27, 0xC2, 0xD7, 0x50, 0xEA, 0xE7, 0xBE, 0xC9,