ENH: merge CMake-CrossCompileBasic to HEAD

-add a RESULT_VARIABLE to INCLUDE()
-add CMAKE_TOOLCHAIN_FILE for specifiying your (potentially crosscompiling) toolchain
-have TRY_RUN() complain if you try to use it in crosscompiling mode (which were compiled but cannot run on this system)
-use CMAKE_EXECUTABLE_SUFFIX in TRY_RUN(), probably TRY_RUN won't be able to
run the executables if they have a different suffix because they are
probably crosscompiled, but nevertheless it should be able to find them
-make several cmake variables presettable by the user: CMAKE_C/CXX_COMPILER, CMAKE_C/CXX_OUTPUT_EXTENSION, CMAKE_SYSTEM_NAME, CMAKE_SYSTEM_INFO_FILE
-support prefix for GNU toolchains (arm-elf-gcc, arm-elf-ar, arm-elf-strip etc.)
-move ranlib on OSX from the file command to a command in executed in cmake_install.cmake
-add support for stripping during install in cmake_install.cmake
-split out cl.cmake from Windows-cl.cmake, first (very incomplete) step to support MS crosscompiling tools
-remove stdio.h from the simple C program which checks if the compiler works, since this may not exist for some embedded platforms
-create a new CMakeFindBinUtils.cmake which collects the search fro ar, ranlib, strip, ld, link, install_name_tool and other tools like these
-add support for CMAKE_FIND_ROOT_PATH for all FIND_XXX commands, which is a
list of directories which will be prepended to all search directories, right
now as a cmake variable, turning it into a global cmake property may need
some more work
-remove cmTestTestHandler::TryExecutable(), it's unused
-split cmFileCommand::HandleInstall() into slightly smaller functions

Alex

1 files changed, 52 insertions, 0 deletions

diff --git a/Modules/CMakeFindBinUtils.cmake b/Modules/CMakeFindBinUtils.cmake
new file mode 100644
index 0000000..48925bc
--- /dev/null
+++ b/Modules/CMakeFindBinUtils.cmake
@@ -0,0 +1,52 @@
+
+# search for additional tools required for C/C++ (and other languages ?)
+#
+# If the internal cmake variable _CMAKE_TOOLCHAIN_PREFIX is set, this is used 
+# as prefix for the tools (e.g. arm-elf-gcc etc.)
+# If the cmake variable _CMAKE_TOOLCHAIN_LOCATION is set, the compiler is
+# searched only there. The other tools are at first searched there, then 
+# also in the default locations.
+#
+# Sets the following variables: 
+#   CMAKE_AR
+#   CMAKE_RANLIB
+#   CMAKE_LINKER
+#   CMAKE_STRIP
+#   CMAKE_INSTALL_NAME_TOOL
+
+# on UNIX, cygwin and mingw
+IF(UNIX OR CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+  FIND_PROGRAM(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ar PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_AR NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ar)
+
+  FIND_PROGRAM(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ranlib ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_RANLIB NAMES ${_CMAKE_TOOLCHAIN_PREFIX}ranlib)
+  IF(NOT CMAKE_RANLIB)
+    SET(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
+  ENDIF(NOT CMAKE_RANLIB)
+
+  FIND_PROGRAM(CMAKE_STRIP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}strip PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_STRIP NAMES ${_CMAKE_TOOLCHAIN_PREFIX}strip)
+
+  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)
+
+ENDIF(UNIX OR CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+
+IF(APPLE)
+  FIND_PROGRAM(CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_INSTALL_NAME_TOOL NAMES install_name_tool)
+
+  MARK_AS_ADVANCED(CMAKE_INSTALL_NAME_TOOL)
+ENDIF(APPLE)
+
+IF("${CMAKE_CXX_COMPILER_ID}" MATCHES "MSVC" OR "${CMAKE_C_COMPILER_ID}" MATCHES "MSVC")
+  FIND_PROGRAM(CMAKE_LINKER NAMES link PATHS ${_CMAKE_TOOLCHAIN_LOCATION} NO_DEFAULT_PATH)
+  FIND_PROGRAM(CMAKE_LINKER NAMES link)
+
+  MARK_AS_ADVANCED(CMAKE_LINKER)
+ENDIF("${CMAKE_CXX_COMPILER_ID}" MATCHES "MSVC" OR "${CMAKE_C_COMPILER_ID}" MATCHES "MSVC")
+
+# maybe check for more tools ?