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, 44 insertions, 0 deletions

diff --git a/Tests/CMakeTests/FindBaseTest.cmake.in b/Tests/CMakeTests/FindBaseTest.cmake.in
new file mode 100644
index 0000000..7030847
--- /dev/null
+++ b/Tests/CMakeTests/FindBaseTest.cmake.in
@@ -0,0 +1,44 @@
+set(MY_SOURCE_DIR "@CMAKE_CURRENT_SOURCE_DIR@")
+
+set(_HEADER cmake_i_do_not_exist_in_the_system.h)
+set(_HEADER_FULL "${MY_SOURCE_DIR}/include/${_HEADER}")
+
+# at first check that the header isn't found without special measures
+find_file(FOO_H_1 ${_HEADER})
+if(FOO_H_1)
+   message(FATAL_ERROR "${_HEADER} found: ${FOO_H_1}, it should not exist !")
+endif(FOO_H_1)
+
+# with this it still should not be found, since the include/ subdir is still missing
+set(CMAKE_INCLUDE_PATH "${MY_SOURCE_DIR}")
+find_file(FOO_H_2 ${_HEADER})
+if(FOO_H_2)
+   message(FATAL_ERROR "${_HEADER} found: ${FOO_H_2}, it should not exist !")
+endif(FOO_H_2)
+
+# now with the PATH_SUFFIX it should be found
+find_file(FOO_H_3 NAMES ${_HEADER} PATH_SUFFIXES include )
+if(NOT "${FOO_H_3}" STREQUAL "${_HEADER_FULL}")
+   message(FATAL_ERROR "Did not find \"${_HEADER_FULL}\"\ngot ${FOO_H_3} instead !")
+endif(NOT "${FOO_H_3}" STREQUAL "${_HEADER_FULL}")
+
+# without PATH_SUFFIX, but with a CMAKE_INCLUDE_PATH it should not be found
+set(CMAKE_INCLUDE_PATH /include)
+find_file(FOO_H_4 ${_HEADER})
+if(FOO_H_4)
+   message(FATAL_ERROR "${_HEADER} found: ${FOO_H_4}, it should not exist !")
+endif(FOO_H_4)
+
+# when setting CMAKE_FIND_ROOT_PATH to the current source dir,
+# together with the CMAKE_INCLUDE_PATH it should be found
+set(CMAKE_FIND_ROOT_PATH blub "${MY_SOURCE_DIR}")
+find_file(FOO_H_5 ${_HEADER})
+if(NOT "${FOO_H_5}" STREQUAL "${_HEADER_FULL}")
+   message(FATAL_ERROR "Did not find \"${_HEADER_FULL}\"\ngot ${FOO_H_5} instead !")
+endif(NOT "${FOO_H_5}" STREQUAL "${_HEADER_FULL}")
+
+# by explicitely disabling CMAKE_FIND_ROOT_PATH again it shouldn't be found
+find_file(FOO_H_6 ${_HEADER} NO_CMAKE_FIND_ROOT_PATH)
+if(FOO_H_6)
+   message(FATAL_ERROR "${_HEADER} found: ${FOO_H_6}, it should not exist !")
+endif(FOO_H_6)