0029377: Configuration, CMake - linkage errors while using static OCCT libraries...
[occt.git] / dox / dev_guides / building / cmake / cmake.md
ba06f8bb 1Building with CMake {#occt_dev_guides__building_cmake}
e5bd0d98 2===================
72c37458 6@section build_cmake_intro General
e5bd0d98 7
80223385 8This article describes the **CMake**-based build process, which is now suggested as a standard way to produce the binaries of Open CASCADE Technology from sources. *OCCT requires CMake version 2.8.12 or later*.
e5bd0d98 9
80223385 10@note Compared to the previous (6.x) releases of Open CASCADE Technology, OCCT 7.x has a complete set of CMake scripts and projects, so that there is no need to use WOK anymore. Moreover, CMake gives you a powerful configuration tool, which allows to control many aspects of OCCT deployment. At the same time this tool is quite intuitive, which is a significant advantage over the legacy WOK utilities.
e5bd0d98 11
80223385 12Here we describe the build procedure on the example of Windows platform with Visual Studio 2010.
72c37458 13However, CMake is cross-platform and can be used to build OCCT on Linux and OS X in essentially the same way.
e5bd0d98 14
80223385 15@note Before you start, make sure to have installed all 3-rd party products that you are going to use with OCCT; see @ref occt_dev_guides__building.
e5bd0d98 16
72c37458 17@section build_cmake_start Start CMake
e5bd0d98 18
72c37458 19CMake is a tool that generates the actual project files for the selected target build system (e.g. Unix makefiles) or IDE (e.g. Visual Studio 2010).
e5bd0d98 20
80223385 21For unexperienced users we recommend to start with *cmake-gui* -- a cross-platform GUI tool provided by CMake on Windows, Mac and Linux.
22A command-line alternative, *ccmake* can also be used.
e5bd0d98 23
80223385 24CMake deals with three directories: source, build or binary and installation.
e5bd0d98 25
80223385 26* The source directory is where the sources of OCCT are located in your file system;
27* The build or binary directory is where all files created during CMake configuration and generation process will be located. The mentioned process will be described below.
8072aba1 28* The installation directory is where binaries will be installed after building the *INSTALL* project that is created by CMake generation process, along with header files and resources required for OCCT use in applications.
576f8b11 29
72c37458 30The good practice is not to use the source directory as a build one.
31Different configurations should be built in different build directories to avoid conflicts.
32It is however possible to choose one installation directory for several configurations of OCCT (differentiated by platform, bitness, compiler and build type), for example:
316d77d9 33
3f812249 34 d:/occt/ -- the source directory
35 d:/tmp/occt-build-vc10-x64 -- the build directory with the generated
36 solution and other intermediate files created during a CMake tool working
37 d:/occt-install -- the installation directory that is
8072aba1 38 able to contain several OCCT configurations
32856b63 39
72c37458 40@section build_cmake_conf Configuration process
e5bd0d98 41
8da8f3d2 42If the command-line tool is used, run the tool from the build directory with a single argument indicating the source (relative or absolute path) directory:
e5bd0d98 43
8da8f3d2 44 cd d:/tmp/occt-build-vc10-x64
45 ccmake d:/occt
e5bd0d98 46
316d77d9 47@figure{/dev_guides/building/cmake/images/cmake_image000.png}
e5bd0d98 48
576f8b11 49Press *c* to configure.
e5bd0d98 50
80223385 51All actions required in the configuration process with the GUI tool will be described below.
576f8b11 52
80223385 53If the GUI tool is used, run this tool without additional arguments and after that specify the source directory by clicking **Browse Source** and the build (binary) one by clicking **Browse Build**.
adc33035 54
316d77d9 55@figure{/dev_guides/building/cmake/images/cmake_image001.png}
576f8b11 56
316d77d9 57**Note**: Each configuration of the project should be built in its own directory. When building multiple configurations it is recommended to indicate in the name of build directories the system, bitness and compiler (e.g., <i>d:/occt/build/win32-vc10</i> ).
576f8b11 58
316d77d9 59Once the source and build directories are selected, "Configure" button should be pressed in order to start manual configuration process. It begins with selection of a target configurator. It is "Visual Studio 10 2010 Win64" in our example.
ad211ad3 60
316d77d9 61@figure{/dev_guides/building/cmake/images/cmake_image002.png}
ad211ad3 62
a20cce39 63To build OCCT for **Universal Windows Platform (UWP)** specify the path to toolchain file for cross-compiling <i>d:/occt/adm/templates/uwp.toolchain.config.cmake</i>.
65Alternatively, if you are using CMake from the command line add options -DCMAKE_SYSTEM_NAME=WindowsStore -DCMAKE_SYSTEM_VERSION=10.0 .
742cc8b0 66
80223385 67**Note**: Universal Windows Platform (UWP) is supported only on "Visual Studio 14 2015". File <i>d:/occt/samples/xaml/ReadMe.md</i> describes the building procedure of XAML (UWP) sample.
742cc8b0 68
80223385 69Once "Finish" button is pressed, the first pass of the configuration process is executed. At the end of the process, CMake outputs the list of environment variables, which have to be properly specified for successful configuration.
316d77d9 70
8da8f3d2 71@figure{/dev_guides/building/cmake/images/cmake_image003.png}
80223385 73The error message provides some information about these variables. This message will appear after each pass of the process until all required variables are specified correctly.
316d77d9 74
80223385 75The change of the state of some variables can lead to the appearance of new variables. The new variables appeared after the pass of the configuration process are highlighted with red color by CMake GUI tool.
316d77d9 76
80223385 77Note: There is "grouped" option, which groups variables with a common prefix.
316d77d9 78
80223385 79The following table gives the full list of environment variables used at the configuration stage:
316d77d9 80
81| Variable | Type | Purpose |
80223385 83| CMAKE_BUILD_TYPE | String | Specifies the build type on single-configuration generators (such as make). Possible values are Debug, Release and RelWithDebInfo |
84| USE_FREEIMAGE | Boolean flag | Indicates whether FreeImage product should be used in OCCT visualization module for support of popular graphics image formats (PNG, BMP, etc.) |
85| USE_GL2PS | Boolean flag | Indicates whether GL2PS product should be used in OCCT visualization module for support of vector image formats (PS, EPS, etc.) |
3f812249 86| USE_TBB | Boolean flag | Indicates whether TBB 3rd party is used or not. TBB stands for Threading Building Blocks, the technology of Intel Corp, which comes with different mechanisms and patterns for injecting parallelism into your application. OCCT remains parallel even without TBB product |
80223385 87| USE_VTK | Boolean flag | Indicates whether VTK 3rd party is used or not. VTK stands for Visualization ToolKit, the technology of Kitware Inc intended for general-purpose scientific visualization. OCCT comes with a bridge between CAD data representation and VTK by means of its dedicated VIS component (VTK Integration Services). You may skip this 3rd party unless you are planning to use VTK visualization for OCCT geometry. See the official documentation @ref occt_user_guides__vis for the details on VIS |
3f812249 88| 3RDPARTY_DIR | Path | Defines the root directory where all required 3rd party products will be searched. Once you define this path it is very convenient to click "Configure" button in order to let CMake automatically detect all necessary products|
316d77d9 89| 3RDPARTY_FREETYPE_* | Path | Path to Freetype binaries |
90| 3RDPARTY_TCL_* 3RDPARTY_TK_* | Path | Path to Tcl/Tk binaries |
91| 3RDPARTY_FREEIMAGE* | Path | Path to Freeimage binaries |
92| 3RDPARTY_GL2PS_* | Path | Path to GL2PS binaries |
93| 3RDPARTY_TBB* | Path | Path to TBB binaries |
94| 3RDPARTY_VTK_* | Path | Path to VTK binaries |
4ff92abe 95| BUILD_MODULE_<MODULE>| Boolean flag | Indicates whether the corresponding OCCT module should be built or not. It should be noted that some toolkits of a module can be built even if this module is not checked (this happens if some other modules depend on these toolkits). The main modules and their descriptions can be found in @ref user_guides |
77cd443b 96| BUILD_LIBRARY_TYPE | String | Specifies the type of library to be created. "Shared" libraries are linked dynamically and loaded at runtime. "Static" libraries are archives of object files used when linking other targets. Note that Draw Harness plugin system is incompatible with "Static" builds, and therefore it should be excluded. Using "Static" libraries also might require modification in building procedures of user application (and OCCT samples); on Windows platform, user application should define HAVE_NO_DLL. |
316d77d9 97| BUILD_ADDITIONAL_TOOLKITS | String | Semicolon-separated individual toolkits to include into build process. If you want to build some particular libraries (toolkits) only, then you may uncheck all modules in the corresponding *BUILD_MODUE_\<MODULE\>* options and provide the list of necessary libraries here. Of course, all dependencies will be resolved automatically |
80223385 98| BUILD_YACCLEX | Boolean flag | Enables Flex/Bison lexical analyzers. OCCT source files relating to STEP reader and ExprIntrp functionality are generated automatically with Flex/Bison. Checking this option leads to automatic search of Flex/Bison binaries and regeneration of the mentioned files |
4b3541c6 99| BUILD_MODULE_MfcSamples | Boolean flag | Indicates whether MFC samples should be built together with OCCT. This option is only relevant to Windows platforms |
d2c90917 100| BUILD_Inspector | Boolean flag | Indicates whether Inspector should be built together with OCCT. |
80223385 101| BUILD_DOC_Overview | Boolean flag | Indicates whether OCCT overview documentation project should be created together with OCCT. It is not built together with OCCT. Checking this option leads to automatic search of Doxygen binaries. Its building calls Doxygen command to generate the documentation in HTML format |
109aa56e 102| BUILD_PATCH | Path | Points to the directory recognized as a "patch" for OCCT. If specified, the files from this directory take precedence over the corresponding native OCCT sources. This way you are able to introduce patches to Open CASCADE Technology not affecting the original source distribution |
80223385 103| BUILD_WITH_DEBUG | Boolean flag | Enables extended messages of many OCCT algorithms, usually printed to cout. These include messages on internal errors and special cases encountered, timing, etc. |
7a59f4ce 104| BUILD_ENABLE_FPE_SIGNAL_HANDLER | Boolean flag | Enable/Disable the floating point exceptions (FPE) during DRAW execution only. Corresponding environment variable (CSF_FPE) can be changed manually in custom.bat/sh scripts without regeneration by CMake. |
316d77d9 105| CMAKE_CONFIGURATION_TYPES | String | Semicolon-separated CMake configurations |
80223385 106| INSTALL_DIR | Path | Points to the installation directory. *INSTALL_DIR* is a synonym of *CMAKE_INSTALL_PREFIX*. The user can specify both *INSTALL_DIR* or *CMAKE_INSTALL_PREFIX* |
4b3541c6 107| INSTALL_DIR_BIN | Path | Relative path to the binaries installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_BIN}) |
108| INSTALL_DIR_SCRIPT | Path | Relative path to the scripts installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_SCRIPT}) |
109| INSTALL_DIR_LIB | Path | Relative path to the libraries installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_LIB}) |
110| INSTALL_DIR_INCLUDE | Path | Relative path to the includes installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_INCLUDE}) |
111| INSTALL_DIR_RESOURCE | Path | Relative path to the resources installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_RESOURCE}) |
80223385 112| INSTALL_DIR_LAYOUT | String | Defines the structure of OCCT files (binaries, resources, headers, etc.) for the install directory. Two variants are predefined: for Windows (standard OCCT layout) and for Unix operating systems (standard Linux layout). If needed, the layout can be customized with INSTALL_DIR_* variables |
4b3541c6 113| INSTALL_DIR_DATA | Path | Relative path to the data files installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_DATA}) |
114| INSTALL_DIR_SAMPLES | Path | Relative path to the samples installation directory. Note that only "samples/tcl" folder will be installed. (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_SAMPLES}) |
115| INSTALL_DIR_TESTS | Path | Relative path to the tests installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_TESTS}) |
116| INSTALL_DIR_DOC | Path | Relative path to the documentation installation directory (absolute path is ${INSTALL_DIR}/${INSTALL_DIR_DOC}) |
316d77d9 117| INSTALL_FREETYPE | Boolean flag | Indicates whether Freetype binaries should be installed into the installation directory |
118| INSTALL_FREEIMAGE* | Boolean flag | Indicates whether Freeimage binaries should be installed into the installation directory |
119| INSTALL_GL2PS | Boolean flag | Indicates whether GL2PS binaries should be installed into the installation directory |
120| INSTALL_TBB | Boolean flag | Indicates whether TBB binaries should be installed into the installation directory |
121| INSTALL_VTK | Boolean flag | Indicates whether VTK binaries should be installed into the installation directory |
122| INSTALL_TCL | Boolean flag | Indicates whether TCL binaries should be installed into the installation directory |
0e617b05 123| INSTALL_TEST_CASES | Boolean flag | Indicates whether non-regression OCCT test scripts should be installed into the installation directory |
4b3541c6 124| INSTALL_DOC_Overview | Boolean flag | Indicates whether OCCT overview documentation should be installed into the installation directory |
316d77d9 125
80223385 126**Note:** Only the forward slashes ("/") are acceptable in the CMake options defining paths.
316d77d9 127
72c37458 128@section build_cmake_3rdparty 3rd party search mechanism
316d77d9 129
72c37458 130If *3RDPARTY_DIR* directory is defined, then required 3rd party binaries are sought in it, and default system folders are ignored.
316d77d9 131
3f812249 132The procedure expects to find binary and header files of each 3rd party product in its own sub-directory: *bin*, *lib* and *include*.
316d77d9 133
80223385 134The results of the search (achieved on the next pass of the configuration process) are recorded in the corresponding variables:
e5bd0d98 135
3f812249 136* *3RDPARTY_\<PRODUCT\>_DIR* -- path to the 3rdparty directory (with directory name) (e.g. <i>D:/3rdparty/tcltk-86-32</i>)
137* *3RDPARTY_\<PRODUCT\>_LIBRARY_DIR* -- path to the directory containing a library (e.g. <i>D:/3rdparty/tcltk-86-32/lib</i>).
138* *3RDPARTY_\<PRODUCT\>_INCLUDE_DIR* -- path to the directory containing a header file (e.g., <i>D:/3rdparty/tcltk-86-32/include</i>)
139* *3RDPARTY_\<PRODUCT\>_DLL_DIR* -- path to the directory containing a shared library (e.g., <i>D:/3rdparty/tcltk-86-32/bin</i>) This variable is only relevant to Windows platforms.
9f33b387 140
8072aba1 141Note: each library and include directory should be children of the product directory if the last one is defined.
e5bd0d98 142
143The search process is as follows:
576f8b11 1451. Common path: *3RDPARTY_DIR*
1462. Path to a particular 3rd-party library: *3RDPARTY_\<PRODUCT\>_DIR*
5c573e69 1473. Paths to headers and binaries:
9f33b387 148 1. *3RDPARTY_\<PRODUCT\>_INCLUDE_DIR*
e5bd0d98 151
8072aba1 152If a variable of any level is not defined (empty or <i> \<variable name\>-NOTFOUND </i>) and the upper level variable is defined, the content of the non-defined variable will be sought at the next configuration step. If the search process at level 3 does not find the required files, it seeks in default places.
e5bd0d98 153
316d77d9 154If a search result (include path, or library path, or dll path) does not meet your expectations, you can change *3RDPARTY_\<PRODUCT\>_*_DIR variable*, clear (if they are not empty) *3RDPARTY_\<PRODUCT\>_DLL_DIR, 3RDPARTY_\<PRODUCT\>_INCLUDE_DIR* and 3RDPARTY_\<PRODUCT\>_LIBRARY_DIR variables (or clear one of them) and run the configuration process again.
5c573e69 155
576f8b11 156At this time the search will be performed in the newly identified directory
9f33b387 157and the result will be recorded to corresponding variables (replace old value if it is necessary).
e5bd0d98 158
8da8f3d2 159For example, *3RDPARTY_FREETYPE_DIR* variable
e5bd0d98 160
8da8f3d2 161 d:/3rdparty/freetype-2.4.10
e5bd0d98 162
163can be changed to
8da8f3d2 165 d:/3rdparty/freetype-2.5.3
e5bd0d98 166
8072aba1 167During the configuration process the related variables (*3RDPARTY_FREETYPE_DLL_DIR*, *3RDPARTY_FREETYPE_INCLUDE_DIR* and *3RDPARTY_FREETYPE_LIBRARY_DIR*) will be filled with new found values.
e5bd0d98 168
316d77d9 169**Note**: The names of searched libraries and header files are hard-coded. If there is the need to change their names, change appropriate cmake variables (edit CMakeCache.txt file or edit in cmake-gui in advance mode) without reconfiguration: *3RDPARTY_\<PRODUCT\>_INCLUDE* for include, *3RDPARTY_\<PRODUCT\>_LIB* for library and *3RDPARTY_\<PRODUCT\>_DLL* for shared library.
e5bd0d98 170
72c37458 171@section build_cmake_gen Projects generation
e5bd0d98 172
8072aba1 173Once the configuration process is done, the "Generate" button is used to prepare project files for the target IDE. In our exercise the Visual Studio solution will be automatically created in the buid directory.
234e52be 174
72c37458 175@section build_cmake_build Building
e5bd0d98 176
576f8b11 177Go to the build folder, start the Visual Studio solution *OCCT.sln* and build it by clicking **Build -> Build Solution**.
8da8f3d2 179@figure{/dev_guides/building/cmake/images/cmake_image004.png}
316d77d9 181By default the build solution process skips the building of the INSTALL and Overview project.
e5bd0d98 182
316d77d9 183When the building process is finished build:
4b3541c6 184* Overview project to generate OCCT overview documentation (if BUILD_DOC_Overview variable is checked)
8da8f3d2 185* the *INSTALL* project to run **the installation process**
e5bd0d98 186
316d77d9 187For this, right-click on the *Overview/INSTALL* project and select **Project Only -> Build Only** -> *Overview/INSTALL* in the solution explorer.
e5bd0d98 188
72c37458 189@section build_cmake_install Installation
e5bd0d98 190
8072aba1 191Installation is a process of extracting redistributable resources (binaries, include files etc) from the build directory into the installation one. The installation directory will be free of project files, intermediate object files and any other information related to the build routines.
e5bd0d98 192
316d77d9 193Normally you use the installation directory of OCCT to link against your specific application.
576f8b11 194
8072aba1 195The directory structure is as follows:
316d77d9 196
3f812249 197 data -- data files for OCCT (brep, iges, stp)
198 doc -- OCCT overview documentation in HTML format
199 inc -- header files
200 samples -- samples
201 src -- all required source files for OCCT
202 tests -- OCCT test suite
203 win32\vc10\bind -- binary files (installed 3rdparties and occt)
204 \libd -- libraries (installed 3rdparties and occt)
576f8b11 205
316d77d9 206**Note:** The above example is given for debug configuration. However, it is generally safe to use the same installation directory for the release build. In the latter case the contents of install directory will be enriched with subdirectories and files related to the release configuration. In particular, the binaries directory win64 will be expanded as
576f8b11 208
316d77d9 209 \win32\vc10\bind
210 \libd
211 \bin
212 \lib
576f8b11 213
8072aba1 214If CMake installation flags are enabled for the 3rd party products (e.g. INSTALL_FREETYPE), then the corresponding binaries will be copied to the same bin(d) and lib(d) directories together with the native binaries of OCCT. Such organization of libraries can be especially helpful if your OCCT-based software does not use itself the 3rd parties of Open CASCADE Technology (thus, there is no sense to pack them into dedicated directories).
e5bd0d98 215
8072aba1 216The installation folder contains the scripts to run *DRAWEXE* (*draw.bat* or *draw.sh*), samples (if they were installed) and overview.html (short-cut for installed OCCT overview documentation).