Build OTB with the SuperBuild
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- The document discusses the Orfeo ToolBox (OTB) users meeting and hackfest in 2015, specifically regarding third party dependencies and the SuperBuild system. - It outlines how OTB has reduced the number of third party dependencies and now uses a SuperBuild system to download, compile, and install dependencies at build time rather than including their source code directly. - The SuperBuild system allows OTB to be built on any platform with just a compiler and CMake by handling all dependency installation, and provides consistent versions of dependencies across platforms.
Build OTB with the SuperBuild
- 1. Orfeo ToolBox users meeting and hackfest 2015 Third parties policy and SuperBuild OTB development team 3 - 5 june 2015, Toulouse
- 2. Third parties in OTB Reduced number of third parties, goodbye to Edison, ConfigFile, Expat, msinttypes Reduced dependency contamination with optional third parties
- 3. Third parties integration Almost all third parties source code is removed from OTB (except with 6S, Siftfast and OssimPlugins) ”External” dependencies have to be installed by the user One module for each third party, containing a CMake call to find package(...) Located in source directory OTB/Modules/ThirdParty Optional third parties enabled/disabled using specific CMake options : OTB USE ...
- 4. SuperBuild : why ? Reduce the effort to prepare an environment ready for OTB compilation Before OTB 5.0 , this was partially done using internal third-parties External dependencies imply different versions and compilation settings depending on the user platform Lots of issues coming from incompatible versions or library setup Need to identify a set of third parties (with their version and compilation options) that is known to work well with OTB on all supported platforms Final purpose : be able to build OTB on any platform with a compiler and CMake (>= 2.8.11)
- 5. SuperBuild : how ? At compilation time, CMake will download, patch, configure, build and install third parties as external projects (for details, check CMake ExternalProject) Choice between system library and SuperBuild library Each external project can declare a set of dependencies
- 6. SuperBuild : settings CMAKE INSTALL PREFIX : should be set by the user as OTB and the dependencies built by SuperBuild will always be installed there (even whitout calling target ”install”) OTB USE ... : the activation options of OTB third parties are also available in SuperBuild. Depending on their value, they will trigger the activation of the corresponding dependencies. USE SYSTEM ... : when a third party is needed, user may choose to use a version already installed on the system, or use the SuperBuild version. DOWNLOAD LOCATION : directory used to download source archives. When archives are already present, no download is performed. An all-in-one archive is supplied on OTB website for an offline compilation. Users should uncompress this archive and set this variable in order to use the ’offline’ mode : https://www.orfeo-toolbox.org/packages/SuperBuild-archives.tar.bz2
- 7. SuperBuild : status Third Party Support : Third Party Support : (version) LinuxOSXWin32 (version) LinuxOSXWin32 Boost (1.50.0) x x x OpenCV (2.4.10) x x x Curl (7.40.0) x OpenJPEG (2.1.0) x x x Expat (2.1.0) x x x OpenThreads (3.2.0) x x x FFTW (3.3.4) x x x Ossim (r23092) x x x GDAL (1.11.2) x x x PCRE (8.36) GEOS (3.4.2) x x x PNG (1.6.16) x GeoTIFF (1.4.0) x x x Proj4 (4.8.0) x x x ITK (4.7.1) x x x Qt4 (4.8.6) x Jpeg (9a) x x x SQLite (3.8.8.1) x x x libKML (1.3.0)1 x x x SWIG (3.0.5) x libSVM (3.20) x x x TIFF (4.0.3) x x x muParser (2.2.3) x x x TinyXML (2.6.2) x x x muParserX (3.0.5) x x x Zlib (1.2.8) x x 1 r863