# Building 3rd-party libraries on Windows

## Introduction

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.

• Mandatory products:
• Tcl/Tk 8.5 - 8.6;
• FreeType 2.4.10 - 2.4.11.
• Optional products:
• TBB 3.x - 4.x;
• gl2ps 1.3.5 - 1.3.8;
• FreeImage 3.14.1 -3.15.4.

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.

## Building Mandatory Third-party Products

### Tcl/Tk

Tcl/Tk is required for DRAW test harness. We recommend installing a binary distribution that can be downloaded from http://www.activestate.com/activetcl.

Go to "Free Downloads" and pick the version of the Install Wizard that matches your target platform – 32 bit (x86) or 64 bit (x64). The version of Visual Studio you use is irrelevant when choosing the Install Wizard.

• to 3rdparty\tcltk-win32 folder (for 32-bit platform) or
• to 3rdparty\tcltk-win64 folder (for 64-bit platform).

Further in this document, this folder is referred to as tcltk.

### FreeType

FreeType is required for text display in a 3D viewer. You can download its sources from http://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:

Update the value of the Output File for x64 configuration:

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 freetype \objs\release or \objs\debug .

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.

## Building Optional Third-party Products

### TBB

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

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

### gl2ps

This third-party product should be built as a dynamically loadable library (dll file). You can download its sources from http://geuz.org/gl2ps/src/.

#### The building procedure

1. Unpack the downloaded archive of gl2ps product (e.g. gl2ps-1.3.5.tgz) into the 3rdparty folder.

As a result, you will get a folder named, for example, 3rdparty\gl2ps-1.3.5-source.

Rename it into gl2ps-platform-compiler-building mode, where

• platform is win32 or win64;
• compiler is vc8, vc9 or vc10;
• building mode - opt (for release) or deb (for debug).

For example, gl2ps-win64-vc10-deb

Further in this document, this folder is referred to as gl2ps.

3. Edit the file gl2ps\CMakeLists.txt.

After line 113 in CMakeLists.txt:

set_target_properties(shared PROPERTIES  COMPILE_FLAGS \"-DGL2PSDLL -DGL2PSDLL_EXPORTS\")


add_definitions(-D_USE_MATH_DEFINES)


Attention: If Cygwin was installed on your computer, make sure that there is no path to it in the PATH variable to avoid possible conflicts during the configuration.

4. Launch CMake (cmake-gui.exe) using the Program menu.

In CMake:

• Define where the source code is. This path must point to gl2ps folder.
• Define where to build the binaries. This path must point to the folder where generated gl2ps project binaries will be placed (for example, gl2ps\bin). Further in this document, this folder is referred to as gl2ps_bin.
• Press Configure button.

• Select the generator (the compiler and the target platform - 32 or 64 bit) in the pop-up window.

• Press Finish button to return to the main CMake window. Expand the ENABLE group and uncheck ENABLE_PNG and ENABLE_ZLIB check boxes.

• Expand the CMAKE group and define CMAKE_INSTALL_PREFIX which is the path where you want to install the build results, for example, c:\occ3rdparty\gl2ps-1.3.5.

• Press Configure button again, then press Generate button to generate Visual Studio projects. After completion, close CMake application.
5. Open the solution file gl2ps_bin\gl2ps.sln in Visual Studio.
• Select a configuration to build
• Choose Release to build Release binaries.
• Choose Debug to build Debug binaries.
• Select a platform to build.
• Choose Win32 to build for a 32 bit platform.
• Choose x64 to build for a 64 bit platform.
• Build the solution.
• Build the INSTALL project.

As a result, you should have the installed gl2ps product in the CMAKE_INSTALL_PREFIX path.

### FreeImage

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

#### The building procedure:

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


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


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).

If you have OpenCL SDK (one provided by Apple, AMD, NVIDIA, Intel, or other vendor) installed on your system, you should find OpenCL headers and libraries required for building OCCT inside that SDK.

Alternatively, you can use OpenCL ICD (Installable Client Driver) Loader provided by Khronos group. The following describes steps used to build OpenCL ICD Loader version 1.2.11.0.