From 9fc3a20d0f2096b4de8d9ff50abd2931f8accf38 Mon Sep 17 00:00:00 2001
From: Recep Aslantas <info@recp.me>
Date: Thu, 26 Jan 2023 11:07:08 +0300
Subject: [PATCH] cmake: prevent overriding CMAKE_BUILD_TYPE if it is
 subdirectory

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 774bd2a03..f834dd2e3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,9 @@ else()
   add_compile_options(-Wall -Werror -O3)
 endif()
 
-if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+get_directory_property(hasParent PARENT_DIRECTORY)
+
+if(NOT hasParent AND NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
   message(STATUS "Setting build type to '${DEFAULT_BUILD_TYPE}' as none was specified.")
   set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}" CACHE STRING "Choose the type of build." FORCE)
   # Set the possible values of build type for cmake-gui