add PreventInSourceBuilds

emrekovanci · emrekovanci · commit 05ee3917a664 · 2024-04-19T10:58:00.000+03:00
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,5 +1,7 @@
 cmake_minimum_required(VERSION 3.26)
 
+include(cmake/PreventInSourceBuilds.cmake)
+
 project(
     Template-CPP
     VERSION 0.1.0
diff --git a/cmake/PreventInSourceBuilds.cmake b/cmake/PreventInSourceBuilds.cmake
@@ -0,0 +1,9 @@
+# ---- In-source guard ----
+
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
+    message(
+        FATAL_ERROR
+        "In-source builds are not supported. "
+        "You may need to delete 'CMakeCache.txt' and 'CMakeFiles/' first."
+    )
+endif()
