 Build 3rd-parties {#build_upgrade_building_3rdparty}
==============================================
@tableofcontents

On Windows, the easiest way to install third-party libraries is to download archive with pre-built binaries from https://opencascade.com/content/3rd-party-components.
On Linux and OS X, it is recommended to use the version installed in the system natively.

@section dev_guides__building_3rdparty_win_1 Windows

This document presents guidelines for building third-party products used by Open CASCADE Technology (OCCT) and samples on Windows platform. It is assumed that you are already familiar with MS Visual Studio / Visual C++. 

You need to use the same version of MS Visual Studio for building all third-party products and OCCT itself, in order to receive a consistent set of run-time binaries. 

The links for downloading the third-party products are available at https://opencascade.com/content/3rd-party-components.

There are two types of third-party products used  by OCCT: 

* Mandatory  products: 
	* Tcl/Tk 8.5 -- 8.6;
	* FreeType 2.4.10 -- 2.5.3.
* Optional  products:
	* TBB 3.x -- 4.x;
	* FreeImage 3.14.1 -- 3.16.0;
	* VTK 6.1.0.

It is recommended to create a separate new folder on your workstation, where you will unpack the downloaded archives of the third-party  products, and where you will build these products (for example, *c:\\occ3rdparty*). 

Further in this document, this folder is referred to as *3rdparty*. 

@subsection dev_guides__building_3rdparty_win_2 Tcl/Tk

Tcl/Tk is required for DRAW test harness.

**Installation from sources: Tcl**
  
Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.
  
1. In the *win* sub-directory, edit file *buildall.vc.bat*:

   * Edit the line "call ... vcvars32.bat" to have correct path to the version of Visual Studio to be used for building, for instance:

         call "%VS80COMNTOOLS%\vsvars32.bat"

     If you are building 64-bit version, set environment accordingly, e.g.:

         call "%VS80COMNTOOLS%\..\..\VC\vcvarsall.bat" amd64
     
   * Define variable *INSTALLDIR* pointing to directory where Tcl/Tk will be installed, e.g.:

         set INSTALLDIR=D:\OCCT\3rdparty\tcltk-86-32

   * Add option *install* to the first command line calling *nmake*:

         nmake -nologo -f makefile.vc release htmlhelp install %1

   * Remove second call to *nmake* (building statically linked executable)

2. Edit file *rules.vc* replacing line 

       SUFX	    = tsgx

   by

       SUFX	    = sgx

   This is to avoid extra prefix 't' in the library name, which is not recognized by default by OCCT build tools.


3. By default, Tcl uses dynamic version of run-time library (MSVCRT), which must be installed on the system where Tcl will be used.
   You may wish to link Tcl library with static version of run-time to avoid this dependency.
   For that:

   * Edit file *makefile.vc* replacing strings "crt = -MD" by "crt = -MT"

   * Edit source file *tclMain.c* (located in folder *generic*) commenting out forward declaration of function *isatty()*.


4. In the command prompt, run *buildall.vc.bat*

   You might need to run this script twice to have *tclsh* executable installed; check subfolder *bin* of specified installation path to verify this.

5. For convenience of use, we recommend making a copy of *tclsh* executable created in subfolder *bin* of *INSTALLDIR* and named with Tcl version number suffix, as *tclsh.exe* (with no suffix)

       > cd D:\OCCT\3rdparty\tcltk-86-32\bin
       > cp tclsh86.exe tclsh.exe

**Installation from sources: Tk**
  
Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.

Apply the same steps as described for building Tcl above, with the same INSTALLDIR.
Note that Tk produces its own executable, called *wish*. 

You might need to edit default value of *TCLDIR* variable defined in *buildall.vc.bat* (should be not necessary if you unpack both Tcl and Tk sources in the same folder).

@subsection dev_guides__building_3rdparty_win_2_2 FreeType

FreeType is required for text display in a 3D viewer. You can download its sources from https://sourceforge.net/projects/freetype/files/

### The building procedure

1. Unpack the downloaded archive of FreeType product into the *3rdparty*  folder. As a result, you will get a folder named, for example, *3rdparty\\freetype-2.4.10*.  Further in this document, this folder is referred to as *freetype*. 
   
2. Open the solution file *freetype\\builds\\win32\\vc20xx\\freetype.sln*  in Visual Studio. Here *vc20xx* stands for your version of Visual Studio. 

3. Select the configuration to build: either Debug or Release. 

4. Build  the *freetype* project. 

   As a result, you will get a  freetype import library (.lib) in the *freetype\\obj\\win32\\vc20xx*  folder.  


5. If you build FreeType for a 64 bit platform, select in the main menu **Build - Configuration Manager**  and add *x64* platform to the solution configuration by copying the settings from Win32 platform: 

   @figure{/build/build_3rdparty/images/3rdparty_image001.png}

   Update the value of the Output File for  x64 configuration: 

   @figure{/build/build_3rdparty/images/3rdparty_image003.png}

   Build the *freetype* project. 

   As a result, you will obtain a 64 bit import library (.lib) file in the *freetype\\x64\\vc20xx*  folder. 

   To build FreeType as a dynamic library (.dll) follow steps 6, 7 and 8 of this procedure. 

6. Open menu Project-> Properties-> Configuration  Properties-> General and change option **Configuration Type** to *Dynamic  Library (.dll)*. 
7. Edit file *freetype\\include\\freetype\\config\\ftoption.h*:  
  
   in line 255, uncomment the definition of macro *FT_EXPORT* and change it as follows: 

       #define FT_EXPORT(x)   __declspec(dllexport) x 

8. Build  the *freetype* project. 

   As a result, you will obtain the files of the import  library (.lib) and the dynamic library (.dll)   in folders <i>freetype  \\objs\\release</i> or <i>\\objs\\debug </i>. 
   
   If you build for a 64 bit platform, follow step 5 of the procedure. 

   To facilitate the use of FreeType libraries in OCCT with minimal adjustment of build procedures, it is recommended to copy the include files and libraries of FreeType into a separate folder, named according to the pattern: *freetype-compiler-bitness-building mode*, where: 
   * **compiler** is *vc8* or *vc9* or *vc10* or *vc11*; 
   * **bitness**  is *32* or *64*;
   * **building mode** is *opt* (for Release) or *deb* (for Debug). 
    
   The *include* subfolder should be copied as is, while libraries should be renamed to *freetype.lib* and *freetype.dll* (suffixes removed) and placed to subdirectories *lib *and  *bin*, respectively. If the Debug configuration is built, the Debug libraries should be put into subdirectories *libd* and *bind*. 


@subsection dev_guides__building_3rdparty_win_3_1 TBB

This third-party product is installed with binaries 
from the archive that can be downloaded from https://github.com/intel/tbb.
Go to the **Download** page, find the  release version you need  (e.g. *tbb30_018oss*) and pick the archive for Windows  platform. 

Unpack the downloaded  archive of TBB product into the *3rdparty* folder. 

Further in this document,  this folder is referred to as *tbb*. 

@subsection dev_guides__building_3rdparty_win_3_3 FreeImage

This third-party product should be built as a dynamically loadable library (.dll file). 
You can download its sources from 
https://sourceforge.net/projects/freeimage/files/Source%20Distribution/

### The building procedure: 

1. Unpack the  downloaded archive of FreeImage product into *3rdparty* folder. 
  
   As a result, you should have a folder named *3rdparty\\FreeImage*. 
  
   Rename it according to the rule: *freeimage-platform-compiler-building  mode*, where 
   
   * **platform**  is *win32* or *win64*; 
   * **compiler**  is *vc8* or *vc9* or *vc10* or *vc11*; 
   * **building  mode** is *opt* (for release) or *deb* (for debug) 

   Further in this  document, this folder is referred to as *freeimage*. 

2. Open the solution file *freeimage\\FreeImage.*.sln* in your Visual Studio. 
  
   If you use a Visual Studio version higher than VC++ 2008, apply conversion of the workspace. 
   Such conversion should be suggested automatically by Visual  Studio. 
    
3. Select a  configuration to build. 

   - Choose **Release**  if you are building Release binaries. 
   - Choose **Debug** if you are building  Debug binaries. 

   *Note:* 

   If you want to  build a debug version of FreeImage binaries then you need to rename the following files in FreeImage and FreeimagePlus projects:
   
   Project -> Properties -> Configuration Properties -> Linker -> General -> Output File

       FreeImage*d*.dll  to FreeImage.dll 
       FreeImagePlus*d*.dll to FreeImagePlus.dll 

   Project -> Properties -> Configuration Properties -> Linker -> Debugging-> Generate Program Database File

       FreeImage*d*.pdb  to FreeImage.pdb 
       FreeImagePlus*d*.pdb to FreeImagePlus.pdb 

   Project -> Properties -> Configuration Properties -> Linker -> Advanced-Import Library

       FreeImage*d*.lib  to FreeImage.lib 
       FreeImagePlus*d*.lib  to FreeImagePlus.lib 

   Project -> Properties -> Configuration Properties -> Build Events -> Post -> Build Event -> Command Line 

       FreeImage*d*.dll     to FreeImage.dll 
       FreeImage*d*.lib     to FreeImage.lib 
       FreeImagePlus*d*.dll to FreeImagePlus.dll 
       FreeImagePlus*d*.lib to FreeImagePlus.lib 

   Additionally, rename in project FreeImagePlus 
   
   Project -> Properties -> Configuration  Properties -> Linker -> Input -> Additional Dependencies 

       from FreeImage*d*.lib to FreeImage.lib 

4. Select a platform to build. 

   - Choose *Win32* if you are building for a 32 bit platform. 
   - Choose *x64* if you are building for a 64 bit platform. 

5. Start the building process. 

   As a result, you should have the  library files of FreeImage product  in *freeimage\\Dist* folder (*FreeImage.dll* and *FreeImage.lib*) and in *freeimage\\Wrapper\\FreeImagePlus\\dist* folder (*FreeImagePlus.dll* and *FreeImagePlus.lib*).

@subsection dev_guides__building_3rdparty_win_3_4 VTK

VTK is an open-source, freely available software system for 3D computer graphics, image processing and visualization. VTK Integration Services component provides adaptation functionality for visualization of OCCT topological shapes by means of VTK library.

### The building procedure:

1. Download the necessary archive from https://www.vtk.org/VTK/resources/software.html and unpack it into *3rdparty* folder.

   As a result, you will get a folder named, for example, <i>3rdparty\VTK-6.1.0.</i>

   Further in this document, this folder is referred to as *VTK*.

2. Use CMake to generate VS projects for building the library:
   - Start CMake-GUI and select VTK folder as source path, and the folder of your choice for VS project and intermediate build data.
   - Click **Configure**.
   - Select the VS version to be used from the ones you have installed (we recommend using VS 2010) and the architecture (32 or 64-bit).
   - Generate VS projects with default CMake options. The open solution *VTK.sln* will be generated in the build folder.

3. Build project VTK in Release mode.


@section build_3rdparty_linux Linux

This document presents additional guidelines for building third-party 
products used by Open CASCADE Technology and samples on Linux platform. 

The links for downloading the third-party products are available on the web site at 
https://opencascade.com/content/3rd-party-components.

There are two types of third-party products, which are  necessary to build OCCT: 
  
* Mandatory  products: 
	* Tcl/Tk 8.5 - 8.6;  
	* FreeType 2.4.10 - 2.5.3;
* Optional  products: 
	* TBB 3.x - 4.x;
	* FreeImage 3.14.1 - 3.16.0;
	* VTK 6.1.0.

@subsection dev_guides__building_3rdparty_linux_4 Installation From Official Repositories

**Debian-based distributives**

All 3rd-party products required for building of OCCT could be installed
from official repositories. You may install them from console using apt-get utility:

    sudo apt-get install tcllib tklib tcl-dev tk-dev libfreetype-dev libx11-dev libgl1-mesa-dev libfreeimage-dev rapidjson-dev

Building is possible with C++ compliant compiler:

    sudo apt-get install g++

@subsection dev_guides__building_3rdparty_linux_2_1 Tcl/Tk 

Tcl/Tk is required for DRAW test harness. 

**Installation from sources: Tcl**
  
Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.
  
1. Enter the unix sub-directory of the directory where the Tcl source  files are located <i>(TCL_SRC_DIR)</i>. 

       cd TCL_SRC_DIR/unix   

2. Run the *configure* command:

       configure --enable-gcc  --enable-shared --enable-threads --prefix=TCL_INSTALL_DIR   

   For a 64 bit platform also add <i>--enable-64bit</i> option to the command line. 
  
3. If the configure command has finished successfully, start  the building process:
  
       make   

4. If building is finished successfully, start the installation of Tcl. 
   All binary and service files of the product will be copied to the directory defined by *TCL_INSTALL_DIR* 

       make install   

**Installation from sources: Tk**
  
Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.
  
1. Enter the unix sub-directory of the directory where the Tk source files are located <i>(TK_SRC_DIR)</i> 

       cd TK_SRC_DIR/unix   

2. Run the configure command, where <i>TCL_LIB_DIR</i> is *TCL_INSTALL_DIR/lib*.

       configure --enable-gcc  --enable-shared --enable-threads --with-tcl=TCL_LIB_DIR  --prefix=TK_INSTALL_DIR   

   For a 64 bit platform also add <i>--enable-64bit</i> option to the  command line. 

3. If the configure command has finished successfully, start the building process: 

       make   

4. If the building has finished successfully, start the installation of Tk. 
   All binary and service files of the product will be copied 
   to the directory defined by *TK_INSTALL_DIR* (usually it is *TCL_INSTALL_DIR*) 

       make install   

@subsection dev_guides__building_3rdparty_linux_2_2 FreeType

FreeType is required for text display in the 3D viewer. 
Download the necessary archive from https://sourceforge.net/projects/freetype/files/ and unpack it.
  
1. Enter the directory where the source files of FreeType  are located <i>(FREETYPE_SRC_DIR)</i>. 

       cd FREETYPE_SRC_DIR   

2. Run the *configure* command: 
  
       configure  --prefix=FREETYPE_INSTALL_DIR   

   For a 64 bit platform also add <i>CFLAGS='-m64 -fPIC'  CPPFLAGS='-m64 -fPIC'</i> option to the command line. 
    
3. If the *configure* command has finished successfully, start  the building process: 

       make   

4. If the building has finished successfully, start the installation of FreeType. 
   All binary and service files of the product will be copied to the directory defined by *FREETYPE_INSTALL_DIR* 
    
       make install   

    
@subsection dev_guides__building_3rdparty_linux_3_1 TBB

This third-party product is  installed with binaries from the archive that can be downloaded from https://github.com/intel/tbb.
Go to the **Download** page, find the  release version you need and pick the archive for Linux platform.
To install, unpack the downloaded archive of TBB product.

@subsection dev_guides__building_3rdparty_linux_3_3 FreeImage

Download the necessary archive from https://sourceforge.net/projects/freeimage/files/Source%20Distribution/
and unpack it. The directory with unpacked sources is  further referred to as *FREEIMAGE_SRC_DIR*. 
  
1. Modify *FREEIMAGE_SRC_DIR/Source/OpenEXR/Imath/ImathMatrix.h*: 
   In line 60 insert the following: 

       #include string.h   

2. Enter the directory where the source files of FreeImage are located <i>(FREEIMAGE_SRC_DIR)</i>. 
  
       cd FREEIMAGE_SRC_DIR   

3. Run the building process 
  
       make   

4. Run the installation process 

   a. If you have the permission to write into directories <i>/usr/include</i> and <i>/usr/lib</i>, run the following command: 

          make install   
   b. If you do not have this permission, you need to modify file *FREEIMAGE_SRC_DIR/Makefile.gnu*: 
  
      Change lines 7-9 from:
  
          DESTDIR ?= /   
          INCDIR  ?= $(DESTDIR)/usr/include   
          INSTALLDIR  ?= $(DESTDIR)/usr/lib   

      to: 

          DESTDIR  ?= $(DESTDIR)   
          INCDIR  ?= $(DESTDIR)/include   
          INSTALLDIR  ?= $(DESTDIR)/lib   

      Change lines 65-67 from: 

          install  -m 644 -o root -g root $(HEADER) $(INCDIR)   
          install  -m 644 -o root -g root $(STATICLIB) $(INSTALLDIR)   
          install  -m 755 -o root -g root $(SHAREDLIB) $(INSTALLDIR)   
  
      to:

          install  -m 755 $(HEADER) $(INCDIR)   
          install  -m 755 $(STATICLIB) $(INSTALLDIR)   
          install  -m 755 $(SHAREDLIB) $(INSTALLDIR)

      Change line 70 from: 

          ldconfig

      to:
  
          \#ldconfig   
    
   Then run the installation process by the following command: 

        make DESTDIR=FREEIMAGE_INSTALL_DIR  install   

5. Clean temporary files

        make clean

@subsection dev_guides__building_3rdparty_linux_3_4 VTK

You can download VTK sources from https://www.vtk.org/VTK/resources/software.html

### The building procedure:

Download the necessary archive from https://www.vtk.org/VTK/resources/software.html and unpack it.

1. Install or build *cmake* product from the source file.
2. Start *cmake* in GUI mode with the directory where the source files of *VTK* are located:

       ccmake VTK_SRC_DIR

   * Press <i>[c]</i> to make the  initial configuration
   * Define the necessary options in *VTK_INSTALL_PREFIX*
   * Press <i>[c]</i> to make the final  configuration
   * Press <i>[g]</i> to generate  Makefile and exit

3. Start the building of VTK:

       make

4. Start the installation of VTK. Binaries will be installed according to the *VTK_INSTALL_PREFIX* option.

       make install

@section build_3rdparty_macos Mac OS X

This document presents additional guidelines for building third-party products 
used by Open CASCADE Technology and samples on Mac OS X platform (10.6.4  and later). 

The links for downloading the third-party products are available at https://opencascade.com/content/3rd-party-components.

There are two types of third-party products, which are  necessary to build OCCT: 
  
* Mandatory  products: 
	* Tcl/Tk 8.5 - 8.6;
	* FreeType 2.4.10 - 2.5.3.
* Optional  products: 
	* TBB 3.x - 4.x;
	* FreeImage 3.14.1 - 3.16.0
  

@subsection dev_guides__building_3rdparty_osx_2_1 Tcl/Tk 8.5 

Tcl/Tk is required for DRAW test harness. Version 8.5 or  8.6 can be used with OCCT. 

**Installation from sources: Tcl 8.5**

Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.

1. Enter the *macosx* sub-directory of the directory where the Tcl source files are located <i>(TCL_SRC_DIR)</i>. 

       cd TCL_SRC_DIR/macosx   

2. Run the *configure* command 

       configure --enable-gcc  --enable-shared --enable-threads --prefix=TCL_INSTALL_DIR   

   For a 64 bit platform also add <i>--enable-64bit</i> option to the command line. 

3. If the *configure* command has finished successfully, start the building process 

       make   
  
4. If building is finished successfully, start the installation of Tcl. 
   All binary and service files of the product will be copied to the directory defined by *TCL_INSTALL_DIR*. 

       make install   

**Installation from sources: Tk 8.5**

Download the necessary archive from https://www.tcl.tk/software/tcltk/download.html and unpack it.

1. Enter the *macosx* sub-directory of the directory where the  source files of Tk are located <i>(TK_SRC_DIR)</i>. 

       cd TK_SRC_DIR/macosx   

2. Run the *configure* command, where TCL_LIB_DIR is  TCL_INSTALL_DIR/lib 

       configure --enable-gcc --enable-shared --enable-threads --with-tcl=TCL_LIB_DIR --prefix=TK_INSTALL_DIR   

	For a 64 bit platform also add <i>--enable-64bit</i> option to the  command line. 

3. If the *configure* command has finished successfully, start the building process:

       make   

4. If the building has finished successfully, start the  installation of Tk. All binary and service files of the product will be copied to the directory defined by *TK_INSTALL_DIR* (usually it is TCL_INSTALL_DIR) 

       make install   

@subsection dev_guides__building_3rdparty_osx_2_2 FreeType 2.4.10
  
FreeType is required for text display in the 3D viewer. 

Download the necessary archive from https://sourceforge.net/projects/freetype/files/ and unpack it.

1. Enter the directory where the source files of FreeType  are located <i>(FREETYPE_SRC_DIR)</i>. 

       cd FREETYPE_SRC_DIR   

2. Run the *configure* command 
  
       configure  --prefix=FREETYPE_INSTALL_DIR   

   For a 64 bit platform also add <i>CFLAGS='-m64 -fPIC'  CPPFLAGS='-m64 -fPIC'</i> option to the command line. 

3. If the *configure* command has finished successfully, start  the building process 

       make   

4. If building has finished successfully, start the installation of FreeType. 
   All binary and service files of the product will be copied to the directory defined by *FREETYPE_INSTALL_DIR*.

       make install   
    
@subsection dev_guides__building_3rdparty_osx_3_1 TBB 3.x or 4.x

This third-party product is installed with binaries from the archive 
that can be downloaded from https://github.com/intel/tbb.
Go to the **Download** page, find the release version you need (e.g. *tbb30_018oss*) 
and  pick the archive for Mac OS X platform. 
To install, unpack the downloaded archive of TBB 3.0 product (*tbb30_018oss_osx.tgz*).

@subsection dev_guides__building_3rdparty_osx_3_3 FreeImage 3.14.1 or 3.15.x

Download the necessary archive from 
https://sourceforge.net/projects/freeimage/files/Source%20Distribution/
and unpack it. The directory with unpacked sources is  further referred to as *FREEIMAGE_SRC_DIR*.  

Note that for building FreeImage on Mac OS X 10.7 you should replace *Makefile.osx* 
in *FREEIMAGE_SRC_DIR* by the corrected file, which you can find in attachment to issue #22811 in OCCT Mantis bug tracker 
(https://tracker.dev.opencascade.org/file_download.php?file_id=6937&type=bug).

1. If you build FreeImage 3.15.x you can skip this  step. 
   Modify <i>FREEIMAGE_SRC_DIR/Source/OpenEXR/Imath/ImathMatrix.h:</i> 
  
   In line 60 insert the following: 

       #include string.h 

   Modify <i>FREEIMAGE_SRC_DIR/Source/FreeImage/PluginTARGA.cpp:</i> 
  
   In line 320 replace: 

       SwapShort(value); 

   with: 

       SwapShort(&value); 

2. Enter the directory where the source files of FreeImage  are located <i>(FREEIMAGE_SRC_DIR)</i>. 

       cd FREEIMAGE_SRC_DIR 

3. Run the building process 

       make   

4. Run the installation process 
   
   1. If you have the permission to write into <i>/usr/local/include</i>  and <i>/usr/local/lib</i> directories, run the following command: 

          make install   

   2. If you do not have this permission, you need to modify file *FREEIMAGE_SRC_DIR/Makefile.osx*: 

      Change line 49 from:     

          PREFIX ?= /usr/local

      to:
   
          PREFIX  ?= $(PREFIX) 

      Change lines 65-69 from: 

          install -d -m 755 -o  root -g wheel $(INCDIR) $(INSTALLDIR) 
          install  -m 644 -o root -g wheel $(HEADER) $(INCDIR) 
          install  -m 644 -o root -g wheel $(SHAREDLIB) $(STATICLIB) $(INSTALLDIR) 
          ranlib  -sf $(INSTALLDIR)/$(STATICLIB) 
          ln  -sf $(SHAREDLIB) $(INSTALLDIR)/$(LIBNAME) 
    
      to: 

          install  -d $(INCDIR) $(INSTALLDIR) 
          install  -m 755 $(HEADER) $(INCDIR) 
          install  -m 755 $(STATICLIB) $(INSTALLDIR) 
          install  -m 755 $(SHAREDLIB) $(INSTALLDIR) 
          ln  -sf $(SHAREDLIB) $(INSTALLDIR)/$(VERLIBNAME)  
          ln  -sf $(VERLIBNAME) $(INSTALLDIR)/$(LIBNAME)

      Then run the installation process by the following command: 
  
          make PREFIX=FREEIMAGE_INSTALL_DIR  install 
  
5. Clean temporary files 
  
       make clean
