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README_cmake
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README_cmake
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Instruction for the CMake Build System
======================================
CMake is a family of tools designed to build, test and
package software and it is cross-platform and open
source. CMake and can obtained from http://www.cmake.org.
0 Setup CMake
-------------
CMake is available in most of Linux repositories and can
be therefore easily installed. In Cygwin just use the
usual method with setup.exe to get the latest version of CMake.
For Windows and Mac OS X go to http://www.cmake.org and
download the appropriate binary package. Make sure that the
bin directory of the extracted CMake package is in the
PATH environment variable. Check in the CLI with
cmake --version
that CMake can be found. There is also a graphical interface
to CMake available which can be run with ccmake (Linux, Mac OS X)
or cmake-gui (Windows, Linux, Mac OS X). In the next section
the command line tool cmake is used, but the graphical interface
works similar. Note, that CMake should always operate in a
out-of-source directory. If you need to run CMake again it's best
to remove the whole folder and start with the directory creation
in order to prevent problems with stale CMake cache files.
X Specific instructions for Linux and Mac OS X
==============================================
Create a directory at the same level as the libharu source directory,
e.g. "mkdir libharu_build". Cd into this directory.
Than run cmake with the command
cmake ../libharu
CMake will configure the build and create the appropriate makefiles.
Run "make" to create the library and the examples. There are some
options available which are described below.
X Specific instructions for Windows
===================================
Create a directory at the same level as the libharu source directory,
e.g. "mkdir libharu_build". Cd into this directory.
Since there are more compiler toolsets available for Windows than
the standard gcc compiler, you need to tell cmake which makefile
generator to use
cmake -G "Makefile Generator" ..\libharu
where Make Generator is one of the following (most important listed)
Borland Makefiles = Generates Borland makefiles.
MSYS Makefiles = Generates MSYS makefiles.
MinGW Makefiles = Generates a make file for use with
mingw32-make.
NMake Makefiles = Generates NMake makefiles.
Visual Studio 6 = Generates Visual Studio 6 project files.
Visual Studio 9 2008 = Generates Visual Studio 9 2008 project files.
You get a complete list of all available generators for your platform
with "cmake --help". I'll go into details for one specific compiler toolset.
The other generators work similar.
Using CMake to produce Visual C++ 2008 Makfiles
-----------------------------------------------
First you need to have the command line interface setup correctly. Start
cmd.exe and run "%VS90COMNTOOLS%vsvars32.bat". This will set up the
command line tools of Visual C++ 2008. Cd into the created build
directory and run
cmake -G "NMake Makefiles" ..\libharu
After the configuration and creation of the makefile run "nmake" to create
the libraries and demonstrations. By default a shared library will be
created therefore you need to copy the haru.dll from the src directory
in the demo directory in order for the demonstrations to run correctly.
X Useful CMake options
======================
There are some options available where you can influence the configuration
stage. These options must be given at the command line with the -D flag, e.g.
cmake -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Debug ..\libharu
CMAKE_BUILD_TYPE=Debug|Release - debug or release build
BUILD_SHARED_LIBS=ON|OFF - shared or static build
CMAKE_COLOR_MAKEFILE=ON|OFF - color output
CMAKE_VERBOSE_MAKEFILE=ON|OFF - verbose makefile output
More options can be found here: http://www.cmake.org/Wiki/CMake_Useful_Variables
X How does CMake find libraries
===============================
CMake searches usually in the standard locations to find libraries, which
works well on Linux and Mac OS X. This is not the case for Windows (where
there are simply no standard locations for libraries) or if you want to
use a library at a non-standard location. You can help CMake to find
libraries via two environment variables, e.g. for Windows:
set CMAKE_INCLUDE_PATH=path_to_zlib_headers
set CMAKE_LIBRARY_PATH=path_to_zlib
and then CMake will be able to find zlib.