CMake

To use CMake, create CMakeLists.txt in each directory that makes up your
source repository. The CMakeLists.txt file contains rules. Each rule does
something different, like defining a list of source code, include directories,
etc. Once CMake has processed all the rules in all the CMakeLists.txt files,
it generates the appropriate "makefile(s)" for the system/compiler that you
are on.

THE BOOK OF RULES
-----------------

The key to using CMake is to learn the rules. Each rule has the same format:

NAME_OF_RULE(args....)

where args is a white-space separated listed of arguments. (Arguments
containing spaces should be quoted). For example:

INCLUDE_DIRECTORIES(./ d:/include "c:/Program Files/include")

note that Unix-style slashes are used. The rules may reference CMake
variables, either built-in or defined variables. Two important variables
are built-in to CMake:

CMAKE_SOURCE_DIR - The root directory of the source code
directory tree.

CMAKE_BINARY_DIR - The root directory of the build tree
where binaries are placed. This includes
object files, libraries, and executables.

A rule might reference these as follows:

INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR})

using the ${} delimiters.

Here is a list of current rules. You may also wish to view
the Doxygen documentation (if available) or generate it with
the doxygen.config file in this directory.

Rules: (Generated with cmDumpDocumentation)
------------------------------------------

ABSTRACT_FILES - A list of abstract classes, useful for wrappers.
Usage: ABSTRACT_FILES(file1 file2 ..)

ADD_TARGET - Add an extra target to the build system.
Usage: ADD_TARGET(Name "command to run")

AUX_SOURCE_DIRECTORY - Add all the source files found in the specified directory to
the build.
Usage: AUX_SOURCE_DIRECTORY(dir)

EXECUTABLES - Add a list of executables files.
Usage: EXECUTABLES(file1 file2 ...)

FIND_INCLUDE - Find an include path.
Usage: FIND_INCLUDE(DEFINE try1 try2 ...)

FIND_LIBRARY - Find a library.
Usage: FIND_LIBRARY(DEFINE try1 try2)

FIND_PROGRARM - Find an executable program.
Usage: FIND_PROGRAM(NAME executable1 executable2 ...)

INCLUDE_DIRECTORIES - Add include directories to the build.
Usage: INCLUDE_DIRECTORIES(dir1 dir2 ...).

LIBRARY - Set a name for a library.
Usage: LIBRARY(libraryname)

LINK_DIRECTORIES - Specify link directories.
Usage: Specify the paths to the libraries that will be linked in.
LINK_DIRECTORIES(directory1 directory2 ...)
The directories can use built in definitions like
CMAKE_BINARY_DIR and CMAKE_SOURCE_DIR.

LINK_LIBRARIES - Specify a list of libraries to be linked into executables or
shared objects.
Usage: Specify a list of libraries to be linked into executables or
shared objects. This rule is passed down to all other rules.LINK_LIBRARIES(library1 library2).
The library name should be the same as the name used in the
LIBRARY(library) rule.

PROJECT - Set a name for the entire project. One argument.
Usage: Set the name for the entire project. This takes one argument.
PROJECT(projectname)

SOURCE_FILES - Add a list of source files.
Usage: SOURCE_FILES(file1 file2 ...)

SOURCE_FILES_REQUIRE - Add a list of source files if the required variables are set.
Usage: SOURCE_FILES_REQUIRE(var1 var2 ... SOURCES_BEGIN file1 file2 ...)

SUBDIRS - Add a list of subdirectories to the build.
Usage: Add a list of subdirectories to the build.
SUBDIRS(dir1 dir2 ...)
This will cause any CMakeLists.txt files in the sub directories
to be processed by CMake.

TESTS - Add a list of executables files that are run as tests.
Usage: TESTS(file1 file2 ...)

UNIX_DEFINES - Add -D flags to the command line for Unix only.
Usage: Add -D flags to the command line for Unix only.
UNIX_DEFINES(-DFOO -DBAR)

UNIX_LIBRARIES - Add libraries that are only used for Unix programs.
Usage: UNIX_LIBRARIES(library -lm ...)

WIN32_DEFINES - Add -D define flags to command line for Win32 environments.
Usage: Add -D define flags to command line for Win32 environments.
WIN32_DEFINES(-DFOO -DBAR ...)

WIN32_LIBRARIES - Add libraries that are only used for Win32 programs.
Usage: WIN32_LIBRARIES(library -lm ...)

USING / BUILDING WITH CMAKE
---------------------------

Windows:
-------
These programs are used to drive CMake on Windows:

CMakeSetup.exe -> window MFC based GUI for configure on windows

CMakeSetupCMD.exe -> windows command line version of CMakeConfigure

To build a project on Windows:

load CMake/Source/CMakeSetup.dsw
Build it
Run it
Specify paths

Load ITK.dsw
Build Common, Numerics, then any of the many executables,
or do a Batch build with debug only.

Unix:
----
These programs/files are used to drive CMake on Unix:

configure -> run on unix to configure for build
CMakeBuildTargets -> Unix program to read CMakeLists.txt and
generate CMakeTargets.make

makefile fragments:
CMakeMaster.make -> main file to be included by makefiles
CMakeVariables.make -> all make varibles are set in this file
CMakeRules.make -> All build rules are here (except Simple Rules)
CMakeSimpleRules.make -> simple build rules for .o to .cxx, this is separate
to be able to build CMakeBuildTargets itself.
CMakeLocal.make -> Place for hand configuration
CMakeTargets.make -> generated rules for make style build in each directory
MakefileTemplate.make -> master makefile template used by configure to
generate Makefiles

Unix install:
In place (object files end up in source code directory):

./configure
make

Other directory (object files are in another directory):

mkdir Insight-build
cd Insight-build
../Insight/configure
make

FOR MORE INFORMATION
--------------------
Contact Bill Hoffman bill.hoffman@kitware.com who is the
principal developer.

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