Add info on how to avoid the "Prevented in-tree build" message with CMake
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 94a6ad1..acaa3a2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
if(${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_BINARY_DIR})
- message(FATAL_ERROR "Prevented in-tree built. Please create a build directory outside of the SDL source code and call cmake from there")
+ message(FATAL_ERROR "Prevented in-tree built. Please create a build directory outside of the SDL source code and run \"cmake -S ${CMAKE_SOURCE_DIR} -B .\" from there")
endif()
cmake_minimum_required(VERSION 3.0.0)