STYLE: don't use an extra file to generate CMakeSystem.cmake but instead

configure the toolchain file into it if required
-also search for nm, objdump and objcpy, so these can be used in macros

Alex

Modules/CMakeDetermineSystem.cmake

@@ -73,9 +73,10 @@ IF(CMAKE_TOOLCHAIN_FILE)
   ENDIF(NOT _INCLUDED_TOOLCHAIN_FILE)
 
   IF(_INCLUDED_TOOLCHAIN_FILE)
-    SET(CMAKE_TOOLCHAIN_FILE "${_INCLUDED_TOOLCHAIN_FILE}")
+    SET(CMAKE_TOOLCHAIN_FILE "${_INCLUDED_TOOLCHAIN_FILE}" CACHE FILEPATH "The CMake toolchain file" FORCE)
   ELSE(_INCLUDED_TOOLCHAIN_FILE)
     MESSAGE(FATAL_ERROR "Could not find toolchain file: ${CMAKE_TOOLCHAIN_FILE}") 
+    SET(CMAKE_TOOLCHAIN_FILE "NOTFOUND" CACHE FILEPATH "The CMake toolchain file" FORCE)
   ENDIF(_INCLUDED_TOOLCHAIN_FILE)
 ENDIF(CMAKE_TOOLCHAIN_FILE)
 
@@ -138,26 +139,16 @@ IF(CMAKE_BINARY_DIR)
                 "The system is: ${CMAKE_SYSTEM_NAME} - ${CMAKE_SYSTEM_VERSION} - ${CMAKE_SYSTEM_PROCESSOR}\n")
   ENDIF(PRESET_CMAKE_SYSTEM_NAME)
 
+  # if a toolchain file is used, it needs to be included in the configured file,
+  # so settings done there are also available if they don't go in the cache and in TRY_COMPILE()
+  SET(INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED)
+  IF(DEFINED CMAKE_TOOLCHAIN_FILE)
+    SET(INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED "INCLUDE(\"${CMAKE_TOOLCHAIN_FILE}\")")
+  ENDIF(DEFINED CMAKE_TOOLCHAIN_FILE)
 
-  # if a toolchain file is used use configure_file() to copy it into the 
-  # build tree, because this way e.g. ${CMAKE_SOURCE_DIR} will be replaced
-  # with its full path, and so it will also work when used in try_compile()
-  IF (CMAKE_TOOLCHAIN_FILE)
-
-    SET(_OWN_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY})
-    CONFIGURE_FILE(${CMAKE_TOOLCHAIN_FILE}
-                ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeToolchainFile.cmake)
-
-    CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeSystemWithToolchainFile.cmake.in
+  # configure variables set in this file for fast reload, the template file is defined at the top of this file
+  CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeSystem.cmake.in
                 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake 
                 IMMEDIATE @ONLY)
-  ELSE (CMAKE_TOOLCHAIN_FILE)
-
-    # configure variables set in this file for fast reload, the template file is defined at the top of this file
-    CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeSystem.cmake.in
-                  ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeSystem.cmake 
-                  IMMEDIATE @ONLY)
-
-  ENDIF (CMAKE_TOOLCHAIN_FILE)
 
 ENDIF(CMAKE_BINARY_DIR)

Modules/CMakeFindBinUtils.cmake

@@ -47,7 +47,17 @@ ELSE("${CMAKE_CXX_COMPILER_ID}" MATCHES "MSVC"
   FIND_PROGRAM(CMAKE_LINKER NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ld PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
   FIND_PROGRAM(CMAKE_LINKER NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ld)
 
-  MARK_AS_ADVANCED(CMAKE_AR CMAKE_RANLIB CMAKE_STRIP CMAKE_LINKER)
+  FIND_PROGRAM(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}nm PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_NM NAMES ${_CMAKE_TOOLCHAIN_PREFIX}nm)
+
+  FIND_PROGRAM(CMAKE_OBJDUMP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objdump PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_OBJDUMP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objdump)
+
+  FIND_PROGRAM(CMAKE_OBJCOPY NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objcopy PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_OBJCOPY NAMES ${_CMAKE_TOOLCHAIN_PREFIX}objcopy)
+
+  MARK_AS_ADVANCED(CMAKE_AR CMAKE_RANLIB CMAKE_STRIP CMAKE_LINKER CMAKE_NM CMAKE_OBJDUMP CMAKE_OBJCOPY)
+
 ENDIF("${CMAKE_CXX_COMPILER_ID}" MATCHES "MSVC" 
    OR "${CMAKE_C_COMPILER_ID}" MATCHES "MSVC"
    OR "${CMAKE_GENERATOR}" MATCHES "Visual Studio")

Modules/CMakeSystem.cmake.in

@@ -1,3 +1,5 @@
+@INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED@
+
 SET(CMAKE_SYSTEM "@CMAKE_SYSTEM@")
 SET(CMAKE_SYSTEM_NAME "@CMAKE_SYSTEM_NAME@")
 SET(CMAKE_SYSTEM_VERSION "@CMAKE_SYSTEM_VERSION@")

Modules/CMakeSystemWithToolchainFile.cmake.in

@@ -1,15 +0,0 @@
-# the following file has been configured from @CMAKE_TOOLCHAIN_FILE@ 
-INCLUDE("@_OWN_DIR@/CMakeToolchainFile.cmake")
-
-SET(CMAKE_SYSTEM "@CMAKE_SYSTEM@")
-SET(CMAKE_SYSTEM_NAME "@CMAKE_SYSTEM_NAME@")
-SET(CMAKE_SYSTEM_VERSION "@CMAKE_SYSTEM_VERSION@")
-SET(CMAKE_SYSTEM_PROCESSOR "@CMAKE_SYSTEM_PROCESSOR@")
-
-SET(CMAKE_HOST_SYSTEM "@CMAKE_HOST_SYSTEM@")
-SET(CMAKE_HOST_SYSTEM_NAME "@CMAKE_HOST_SYSTEM_NAME@")
-SET(CMAKE_HOST_SYSTEM_VERSION "@CMAKE_HOST_SYSTEM_VERSION@")
-SET(CMAKE_HOST_SYSTEM_PROCESSOR "@CMAKE_HOST_SYSTEM_PROCESSOR@")
-SET(CMAKE_CROSSCOMPILING "@CMAKE_CROSSCOMPILING@")
-
-SET(CMAKE_SYSTEM_LOADED 1)