ENH: remove support for presetting CMAKE_SYSTEM_INFO_FILE,

CMAKE_SYSTEM_AND_C_COMPILER_INFO_FILE, CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE,
CMAKE_SYSTEM_AND_C_COMPILER_AND_PROCESSOR_INFO_FILE and CMAKE_SYSTEM_AND_CXX_COMPILER_AND_PROCESSOR_INFO_FILE

Instead of presetting these variables to arbitrary filenames, users should
set up CMAKE_SYSTEM_NAME and the compilers correctly and also create a
Platform/ directory so these files will all follow the official cmake style,
which should make it easier to understand and debug project which have their
own platform/toolchain support files.

-remove support for a suffix to MS crosscompilers, since this is not (yet)
supported by cmake and might confuse users

Alex

Modules/CMakeCInformation.cmake

@@ -19,30 +19,24 @@ IF(CMAKE_COMPILER_IS_GNUCC)
 ENDIF(CMAKE_COMPILER_IS_GNUCC)
 
 
-IF(CMAKE_SYSTEM_AND_C_COMPILER_AND_PROCESSOR_INFO_FILE)
-  INCLUDE(${CMAKE_SYSTEM_AND_C_COMPILER_AND_PROCESSOR_INFO_FILE} OPTIONAL)
-ELSE(CMAKE_SYSTEM_AND_C_COMPILER_AND_PROCESSOR_INFO_FILE)
-  IF(CMAKE_SYSTEM_PROCESSOR)
-    IF(CMAKE_C_COMPILER_ID)
-      INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
-    ENDIF(CMAKE_C_COMPILER_ID)
-    IF (NOT _INCLUDED_FILE)
-      INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
-    ENDIF (NOT _INCLUDED_FILE)
-  ENDIF(CMAKE_SYSTEM_PROCESSOR)
-ENDIF(CMAKE_SYSTEM_AND_C_COMPILER_AND_PROCESSOR_INFO_FILE)
-
-
-IF(CMAKE_SYSTEM_AND_C_COMPILER_INFO_FILE)
-  INCLUDE(${CMAKE_SYSTEM_AND_C_COMPILER_INFO_FILE} OPTIONAL)
-ELSE(CMAKE_SYSTEM_AND_C_COMPILER_INFO_FILE)
+# load a hardware specific file, mostly useful for embedded compilers
+IF(CMAKE_SYSTEM_PROCESSOR)
   IF(CMAKE_C_COMPILER_ID)
-    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
+    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
   ENDIF(CMAKE_C_COMPILER_ID)
   IF (NOT _INCLUDED_FILE)
-    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
+    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
   ENDIF (NOT _INCLUDED_FILE)
-ENDIF(CMAKE_SYSTEM_AND_C_COMPILER_INFO_FILE)
+ENDIF(CMAKE_SYSTEM_PROCESSOR)
+
+
+# load the system- and compiler specific files
+IF(CMAKE_C_COMPILER_ID)
+  INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_C_COMPILER_ID}-C OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
+ENDIF(CMAKE_C_COMPILER_ID)
+IF (NOT _INCLUDED_FILE)
+  INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
+ENDIF (NOT _INCLUDED_FILE)
 
 
 # This should be included before the _INIT variables are

Modules/CMakeCXXInformation.cmake

@@ -21,30 +21,23 @@ IF(CMAKE_COMPILER_IS_GNUCXX)
 ENDIF(CMAKE_COMPILER_IS_GNUCXX)
 
 
-IF(CMAKE_SYSTEM_AND_CXX_COMPILER_AND_PROCESSOR_INFO_FILE)
-  INCLUDE(${CMAKE_SYSTEM_AND_CXX_COMPILER_AND_PROCESSOR_INFO_FILE} OPTIONAL)
-ELSE(CMAKE_SYSTEM_AND_CXX_COMPILER_AND_PROCESSOR_INFO_FILE)
-  IF(CMAKE_SYSTEM_PROCESSOR)
-    IF(CMAKE_CXX_COMPILER_ID)
-      INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
-    ENDIF(CMAKE_CXX_COMPILER_ID)
-    IF (NOT _INCLUDED_FILE)
-      INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
-    ENDIF (NOT _INCLUDED_FILE)
-  ENDIF(CMAKE_SYSTEM_PROCESSOR)
-ENDIF(CMAKE_SYSTEM_AND_CXX_COMPILER_AND_PROCESSOR_INFO_FILE)
-
-
-IF(CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE)
-  INCLUDE(${CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE} OPTIONAL)
-ELSE(CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE)
+# load a hardware specific file, mostly useful for embedded compilers
+IF(CMAKE_SYSTEM_PROCESSOR)
   IF(CMAKE_CXX_COMPILER_ID)
-    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
+    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
   ENDIF(CMAKE_CXX_COMPILER_ID)
   IF (NOT _INCLUDED_FILE)
-    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
+    INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}-${CMAKE_SYSTEM_PROCESSOR} OPTIONAL)
   ENDIF (NOT _INCLUDED_FILE)
-ENDIF(CMAKE_SYSTEM_AND_CXX_COMPILER_INFO_FILE)
+ENDIF(CMAKE_SYSTEM_PROCESSOR)
+
+# load the system- and compiler specific files
+IF(CMAKE_CXX_COMPILER_ID)
+  INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_CXX_COMPILER_ID}-CXX OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
+ENDIF(CMAKE_CXX_COMPILER_ID)
+IF (NOT _INCLUDED_FILE)
+  INCLUDE(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL)
+ENDIF (NOT _INCLUDED_FILE)
 
 
 # This should be included before the _INIT variables are

Modules/CMakeDetermineCCompiler.cmake

@@ -8,10 +8,6 @@
 # If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used 
 # as prefix for the tools (e.g. arm-elf-gcc, arm-elf-ar etc.). This works
 # currently with the GNU crosscompilers.
-# It also tries to detect a MS crosscompiler and find out its 
-# suffix (clarm.exe), which will be stored in _CMAKE_TOOLCHAIN_SUFFIX and
-# reused for the CXX compiler.
-#
 #
 # Sets the following variables: 
 #   CMAKE_C_COMPILER
@@ -21,7 +17,6 @@
 #
 # If not already set before, it also sets
 #   _CMAKE_TOOLCHAIN_PREFIX
-#   _CMAKE_TOOLCHAIN_SUFFIX
 
 IF(NOT CMAKE_C_COMPILER)
   SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
@@ -48,7 +43,7 @@ IF(NOT CMAKE_C_COMPILER)
   IF(CMAKE_C_COMPILER_INIT)
     SET(CMAKE_C_COMPILER_LIST ${CMAKE_C_COMPILER_INIT})
   ELSE(CMAKE_C_COMPILER_INIT)
-    SET(CMAKE_C_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}gcc ${_CMAKE_TOOLCHAIN_PREFIX}cc cl${_CMAKE_TOOLCHAIN_SUFFIX} bcc xlc)
+    SET(CMAKE_C_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}gcc ${_CMAKE_TOOLCHAIN_PREFIX}cc cl bcc xlc)
   ENDIF(CMAKE_C_COMPILER_INIT)
 
   # Find the compiler.
@@ -95,15 +90,6 @@ IF (NOT _CMAKE_TOOLCHAIN_PREFIX)
   ENDIF (COMPILER_BASENAME MATCHES "^(.+-)g?cc")
 ENDIF (NOT _CMAKE_TOOLCHAIN_PREFIX)
 
-# if we have a MS cross compiler, it usually has a suffix, like 
-# e.g. clarm.exe or clmips.exe. Use this suffix for the CXX compiler too.
-# the same is true e.g. for the IAR cross compiler, which is "icc<suffix>"
-IF (NOT _CMAKE_TOOLCHAIN_SUFFIX)
-  GET_FILENAME_COMPONENT(COMPILER_BASENAME "${CMAKE_C_COMPILER}" NAME)
-  IF (COMPILER_BASENAME MATCHES "^cl(.+)\\.exe$")
-    STRING(REGEX REPLACE "^cl(.+)\\.exe$"  "\\1" _CMAKE_TOOLCHAIN_SUFFIX "${COMPILER_BASENAME}")
-  ENDIF (COMPILER_BASENAME MATCHES "^cl(.+)\\.exe$")
-ENDIF (NOT _CMAKE_TOOLCHAIN_SUFFIX)
 
 # Build a small source file to identify the compiler.
 IF(${CMAKE_GENERATOR} MATCHES "Visual Studio")

Modules/CMakeDetermineCXXCompiler.cmake

@@ -7,9 +7,6 @@
 # as a default compiler
 # If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used 
 # as prefix for the tools (e.g. arm-elf-g++, arm-elf-ar etc.)
-# It also tries to detect a MS crosscompiler and find out its 
-# suffix (clarm.exe), which will be stored in _CMAKE_TOOLCHAIN_SUFFIX and
-# reused for the C compiler.
 #
 # Sets the following variables:
 #   CMAKE_CXX_COMPILER
@@ -19,7 +16,6 @@
 #
 # If not already set before, it also sets
 #   _CMAKE_TOOLCHAIN_PREFIX
-#   _CMAKE_TOOLCHAIN_SUFFIX
 
 IF(NOT CMAKE_CXX_COMPILER)
   SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
@@ -46,7 +42,7 @@ IF(NOT CMAKE_CXX_COMPILER)
   IF(CMAKE_CXX_COMPILER_INIT)
     SET(CMAKE_CXX_COMPILER_LIST ${CMAKE_CXX_COMPILER_INIT})
   ELSE(CMAKE_CXX_COMPILER_INIT)
-    SET(CMAKE_CXX_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ CC aCC cl${_CMAKE_TOOLCHAIN_SUFFIX} bcc xlC)
+    SET(CMAKE_CXX_COMPILER_LIST ${_CMAKE_TOOLCHAIN_PREFIX}c++ ${_CMAKE_TOOLCHAIN_PREFIX}g++ CC aCC cl bcc xlC)
   ENDIF(CMAKE_CXX_COMPILER_INIT)
 
   # Find the compiler.
@@ -93,16 +89,6 @@ IF (NOT _CMAKE_TOOLCHAIN_PREFIX)
   ENDIF (COMPILER_BASENAME MATCHES "^(.+-)[gc]\\+\\+")
 ENDIF (NOT _CMAKE_TOOLCHAIN_PREFIX)
 
-# if we have a MS cross compiler, it usually has a suffix, like 
-# e.g. clarm.exe or clmips.exe. Use this suffix for the CXX compiler too.
-IF (NOT _CMAKE_TOOLCHAIN_SUFFIX)
-  GET_FILENAME_COMPONENT(COMPILER_BASENAME "${CMAKE_CXX_COMPILER}" NAME)
-  IF (COMPILER_BASENAME MATCHES "^cl(.+)\\.exe$")
-    STRING(REGEX REPLACE "^cl(.+)\\.exe$"  "\\1" _CMAKE_TOOLCHAIN_SUFFIX "${COMPILER_BASENAME}")
-  ENDIF (COMPILER_BASENAME MATCHES "^cl(.+)\\.exe$")
-ENDIF (NOT _CMAKE_TOOLCHAIN_SUFFIX)
-
-
 # This block was used before the compiler was identified by building a
 # source file.  Unless g++ crashes when building a small C++
 # executable this should no longer be needed.

Modules/CMakeSystemSpecificInformation.cmake

@@ -7,9 +7,7 @@
 INCLUDE(CMakeGenericSystem)
 
 # 2. now include SystemName.cmake file to set the system specific information
-IF(NOT CMAKE_SYSTEM_INFO_FILE)
-  SET(CMAKE_SYSTEM_INFO_FILE Platform/${CMAKE_SYSTEM_NAME})
-ENDIF(NOT CMAKE_SYSTEM_INFO_FILE)
+SET(CMAKE_SYSTEM_INFO_FILE Platform/${CMAKE_SYSTEM_NAME})
 
 INCLUDE(${CMAKE_SYSTEM_INFO_FILE} OPTIONAL RESULT_VARIABLE _INCLUDED_SYSTEM_INFO_FILE)
 

Tests/CMakeTests/DummyToolchain.cmake

@@ -4,5 +4,5 @@ set(CMAKE_SYSTEM_VERSION "1.0")
 set(CMAKE_C_COMPILER /opt/foo/bin/arm-elf-gcc)
 set(CMAKE_C_OUTPUT_EXTENSION ".foo")
 
-set(CMAKE_CXX_COMPILER /opt/bar/bin/clarm.exe)
+set(CMAKE_CXX_COMPILER /opt/bar/bin/cl.exe)
 set(CMAKE_CXX_OUTPUT_EXTENSION ".bar")

Tests/CMakeTests/ToolchainTest.cmake.in

@@ -121,10 +121,6 @@ endif(NOT "${CMAKE_C_OUTPUT_EXTENSION}" STREQUAL ".foo")
 
 # check the results from DetermineCXXCompiler
 
-if(NOT "${_CMAKE_TOOLCHAIN_SUFFIX}" STREQUAL "arm")
-   message(FATAL_ERROR "wrong toolchain suffix detected: \"${_CMAKE_TOOLCHAIN_SUFFIX}\", expected: \"arm\"")
-endif(NOT "${_CMAKE_TOOLCHAIN_SUFFIX}" STREQUAL "arm")
-
 if(NOT "${_CMAKE_USER_CXX_COMPILER_PATH}" STREQUAL "/opt/bar/bin")
    message(FATAL_ERROR "wrong CXX compiler location detected: \"${_CMAKE_USER_CXX_COMPILER_PATH}\", expected: \"/opt/bar/bin\"")
 endif(NOT "${_CMAKE_USER_CXX_COMPILER_PATH}" STREQUAL "/opt/bar/bin")
@@ -134,7 +130,6 @@ if(NOT "${CMAKE_CXX_OUTPUT_EXTENSION}" STREQUAL ".bar")
 endif(NOT "${CMAKE_CXX_OUTPUT_EXTENSION}" STREQUAL ".bar")
 
 message(STATUS "CMAKE_SYSTEM: \"${CMAKE_SYSTEM}\"")
-message(STATUS "_CMAKE_TOOLCHAIN_SUFFIX: \"${_CMAKE_TOOLCHAIN_SUFFIX}\"")
 message(STATUS "_CMAKE_TOOLCHAIN_PREFIX: \"${_CMAKE_TOOLCHAIN_PREFIX}\"")
 message(STATUS "_CMAKE_USER_C_COMPILER_PATH: \"${_CMAKE_USER_C_COMPILER_PATH}\"")
 message(STATUS "_CMAKE_USER_CXX_COMPILER_PATH: \"${_CMAKE_USER_CXX_COMPILER_PATH}\"")