From 956a94800faff8df75131f43919c189be2b62d3c Mon Sep 17 00:00:00 2001
From: Andrey Astafyev <dev@246060.ru>
Date: Tue, 1 Jun 2021 13:32:03 +0300
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---
 CMLibCommon.cmake | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMLibCommon.cmake b/CMLibCommon.cmake
index 70e78f4..1851fd0 100644
--- a/CMLibCommon.cmake
+++ b/CMLibCommon.cmake
@@ -5,6 +5,10 @@ if(CMAKE_INSTALL_PREFIX STREQUAL PROJECT_BINARY_DIR)
   message(FATAL_ERROR "Cannot install into build directory")
 endif()
 
+if(CMAKE_INSTALL_PREFIX STREQUAL PROJECT_SOURCE_DIR)
+  message(FATAL_ERROR "Cannot install into source directory")
+endif()
+
 include(CMLibDisableInSourceBuild)
 include(CMakeParseArguments)
 include(GNUInstallDirs)