Adding compiler change detection.

- Tried to add auto cmake reset...so far unsuccessful
- Ported MBC-55X (was used to test compilers)
- Disabled in-source builds, to prevent CMake from shooting itself in the foot.

Lib/CMake/initialize.cmake

@@ -12,6 +12,10 @@ set( CMAKE_LEGACY_CYGWIN_WIN32 0 )
 set( CMAKE_USE_RELATIVE_PATHS  1 )
 
 
+#| Prevent In-Source Builds
+set( CMAKE_DISABLE_SOURCE_CHANGES  ON )
+set( CMAKE_DISABLE_IN_SOURCE_BUILD ON )
+
 
 ###
 # Compiler Lookup
@@ -34,6 +38,17 @@ endif ()
 message( STATUS "Compiler Family:" )
 message( "${COMPILER_FAMILY}" )
 
+#| Compiler Selection Record
+#|  This is used to check if the chip target has changed (a complete cmake reset is needed)
+if ( EXISTS compiler )
+	file( READ ${CMAKE_BINARY_DIR}/compiler COMPILER_RECORD )
+
+	# Detect case if a full cmake reset is required
+	if ( NOT COMPILER_FAMILY STREQUAL COMPILER_RECORD )
+		message( FATAL_ERROR "Changing compilers requires a cmake reset\ne.g. rm -rf *; cmake .." )
+	endif()
+endif ()
+
 #| Load the compiler family specific configurations
 include( Lib/CMake/${COMPILER_FAMILY}.cmake )
 

Lib/CMake/modules.cmake

@@ -259,7 +259,7 @@ set_target_properties( ${TARGET_ELF} PROPERTIES
 set( TARGET_HEX ${TARGET}.hex )
 add_custom_command( TARGET ${TARGET_ELF} POST_BUILD
 	COMMAND ${CMAKE_OBJCOPY} ${HEX_FLAGS} ${TARGET_ELF} ${TARGET_HEX}
-	COMMENT "Creating load file for Flash:  ${TARGET_HEX}"
+	COMMENT "Creating iHex file to load:    ${TARGET_HEX}"
 )
 
 
@@ -279,6 +279,12 @@ add_custom_command( TARGET ${TARGET_ELF} POST_BUILD
 )
 
 
+#| Compiler Selection Record
+add_custom_command( TARGET ${TARGET_ELF} POST_BUILD
+	COMMAND ${CMAKE_SOURCE_DIR}/Lib/CMake/writer compiler ${COMPILER_FAMILY}
+)
+
+
 
 ###
 # Size Information

Lib/CMake/writer

@@ -0,0 +1,10 @@
+#!/bin/bash
+#| Jacob Alexander 2014
+#| Arg List
+#| 1 - File to write to         (e.g. final_chip)
+#| 2 - Contents writing to file (e.g. at90usb1286)
+
+printf "$2" > "$1"
+
+exit $?
+