From c76a6820696f94d49dca171334745de12cb6666e Mon Sep 17 00:00:00 2001
From: Alexander Babikov <lemondrops358@gmail.com>
Date: Thu, 31 Jul 2025 01:57:36 +0500
Subject: [PATCH] CMake: Error out if source directory if `src/` instead of
 top-level dir

---
 CMakeLists.txt     | 4 +++-
 src/CMakeLists.txt | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4dd83523f..5cffe031f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -221,7 +221,7 @@ if(NOT EMU_BUILD_NUM)
     set(EMU_BUILD_NUM 0)
 endif()
 if(NOT EMU_COPYRIGHT_YEAR)
-    set(EMU_COPYRIGHT_YEAR 2024)
+    set(EMU_COPYRIGHT_YEAR 2025)
 endif()
 
 # Libasan
@@ -230,4 +230,6 @@ if(LIBASAN)
     add_link_options(-fsanitize=address)
 endif()
 
+set(CMAKE_TOP_LEVEL_PROCESSED TRUE)
+
 add_subdirectory(src)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c77af8256..724e1fda6 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -16,6 +16,10 @@
 #          Copyright 2024      Jasmine Iwanek.
 #
 
+if(NOT CMAKE_TOP_LEVEL_PROCESSED)
+    message(FATAL_ERROR "Incorrect source directory specified. Delete your build directory and retry with the top-level directory instead")
+endif()
+
 if(APPLE)
     set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 endif()