From c881d86fc8852a2b2215856d3503aba192c0f4ee Mon Sep 17 00:00:00 2001
From: Romain Forlot <romain.forlot@iot.bzh>
Date: Mon, 23 Oct 2017 17:14:06 +0200
Subject: Disallow build in-source.

Change-Id: If606d1ad283a37b7a2c1d4e45d8459ace2ba76c5
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
---
 cmake/cmake.d/03-macros.cmake | 63 +++++++++++++++++++++++++------------------
 1 file changed, 37 insertions(+), 26 deletions(-)

diff --git a/cmake/cmake.d/03-macros.cmake b/cmake/cmake.d/03-macros.cmake
index 3602aa8..bf297a2 100644
--- a/cmake/cmake.d/03-macros.cmake
+++ b/cmake/cmake.d/03-macros.cmake
@@ -23,34 +23,45 @@
 #     Customise your preferences in "./conf.d/cmake/config.cmake"
 #--------------------------------------------------------------------------
 # CMake 3.6 imported macros to simulate list(FILTER ...) subcommand
-# -----------------------
+#--------------------------------------------------------------------------
+MACRO(prevent_in_source_build)
+	execute_process(COMMAND rm -rf ${CMAKE_SOURCE_DIR}/CMakeCache.txt ${CMAKE_SOURCE_DIR}/CMakeCacheForScript.cmake ${CMAKE_SOURCE_DIR}/CMakeFiles ${CMAKE_SOURCE_DIR}/cmake_install.cmake)
+
+	get_filename_component(srcdir "${CMAKE_SOURCE_DIR}" REALPATH)
+	get_filename_component(bindir "${CMAKE_BINARY_DIR}" REALPATH)
+
+	if(${srcdir} STREQUAL ${bindir})
+		message(FATAL_ERROR "${Red}**** ERROR: You trying to build the project from the source directory or a previous build in-source occured. This isn't allowed, you have to clean CMakeCache.txt file from your source directory (${srcdir}), and build from a separate directory. ****\n")
+	endif()
+ENDMACRO(prevent_in_source_build)
+
 MACRO(PARSE_ARGUMENTS prefix arg_names option_names)
-SET(DEFAULT_ARGS)
-FOREACH(arg_name ${arg_names})
-  SET(${prefix}_${arg_name})
-ENDFOREACH(arg_name)
-FOREACH(option ${option_names})
-  SET(${prefix}_${option} FALSE)
-ENDFOREACH(option)
-
-SET(current_arg_name DEFAULT_ARGS)
-SET(current_arg_list)
-FOREACH(arg ${ARGN})
-  LIST_CONTAINS(is_arg_name ${arg} ${arg_names})
-  IF (is_arg_name)
-	SET(${prefix}_${current_arg_name} ${current_arg_list})
-	SET(current_arg_name ${arg})
+	SET(DEFAULT_ARGS)
+	FOREACH(arg_name ${arg_names})
+	SET(${prefix}_${arg_name})
+	ENDFOREACH(arg_name)
+	FOREACH(option ${option_names})
+	SET(${prefix}_${option} FALSE)
+	ENDFOREACH(option)
+
+	SET(current_arg_name DEFAULT_ARGS)
 	SET(current_arg_list)
-  ELSE (is_arg_name)
-	LIST_CONTAINS(is_option ${arg} ${option_names})
-	IF (is_option)
-  SET(${prefix}_${arg} TRUE)
-	ELSE (is_option)
-  SET(current_arg_list ${current_arg_list} ${arg})
-	ENDIF (is_option)
-  ENDIF (is_arg_name)
-ENDFOREACH(arg)
-SET(${prefix}_${current_arg_name} ${current_arg_list})
+	FOREACH(arg ${ARGN})
+	LIST_CONTAINS(is_arg_name ${arg} ${arg_names})
+	IF (is_arg_name)
+		SET(${prefix}_${current_arg_name} ${current_arg_list})
+		SET(current_arg_name ${arg})
+		SET(current_arg_list)
+	ELSE (is_arg_name)
+		LIST_CONTAINS(is_option ${arg} ${option_names})
+		IF (is_option)
+	SET(${prefix}_${arg} TRUE)
+		ELSE (is_option)
+	SET(current_arg_list ${current_arg_list} ${arg})
+		ENDIF (is_option)
+	ENDIF (is_arg_name)
+	ENDFOREACH(arg)
+	SET(${prefix}_${current_arg_name} ${current_arg_list})
 ENDMACRO(PARSE_ARGUMENTS)
 
 MACRO(LIST_CONTAINS var value)
-- 
cgit 1.2.3-korg