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90 lines
3.1 KiB
90 lines
3.1 KiB
[This file is mirrored in both the FlightGear and SimGear packages.]
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You *must* have OpenSceneGraph (OSG) installed to build this version of
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FlightGear.
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Notice that this version of SimGear/FlightGear requires at least OSG 3.0.0.
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You can get the latest version of OSG from:
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http://www.openscenegraph.org/
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Build notes:
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Unzip the file OpenSceneGraph-x.x.zip and install using the following
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commands:
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unzip OpenSceneGraph-x.x
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cd OpenSceneGraph
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ccmake .
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[ While running ccmake: press 'c' to configure, press 'c' once more, and
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then press 'g' to generate and exit ]
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make
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sudo make install
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Also later release versions of OpenSceneGraph can be obtained by
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svn, or you can use the OSG development svn 'trunk', but be warned,
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OSG is always in heavy development, and at certain moments
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in time, it may not compile completely, so, as usual, it is
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recommended that you stay with released versions.
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Installation notes:
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In some unix/linux distributions, particularly 64-bit
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systems, OSG may install its shared libraries in other than
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/usr/lib, /usr/local/lib or $prefix/lib!
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This does not seem to effect binary installation, which is
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to $prefix/bin, nor header installation, which remains
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$prefix/include. Just the shared libraries, and perhaps
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only for 64-bit systems, or higher as, and when available.
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The default is /usr/local/lib64 or $prefix/lib64 in
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64-bit systems. This may cause problems with the auto-conf
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tools when configuring and compiling FlighGear, since
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even using the configure option --with-osg=$prefix
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will not 'fix' the problem.
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The are various ways to deal with this, which mainly depend
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on whether you just want one version of OSG 'globally'
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installed, or desire to be able to build, and run, FlightGear
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against 'different' versions of OSG.
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There is a parameter, -D LIB_POSTFIX= or -D LIB_POSTFIX=""
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which can be passed to cmake OSG to force the OSG library
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installation into the 'standard' "$prefix/lib".
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OSG cmake advises of a post installation step -
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$ sudo make install_ld_conf
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which, if available, will add an openscenegraph.conf file
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to the /etc/ld.so.conf.d folder, with the line -
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${CMAKE_INSTALL_PREFIX}lib${LIB_POSTFIX}
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and run 'ldconfig' to add this to the 'cache'. But this
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option does not always seem available.
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Configuring SimGear and Flightgear notes:
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If you install OSG in other than the 'standard' directories,
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you must add --with-osg=$prefix when configuring
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SimGear and FlightGear. This will cause the auto-conf
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tools to look in $prefix/include for headers, and
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$prefix/lib for libraries, but _NOT_ in 'lib64'!
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If the OSG is installed to a unique $prefix directory, then
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it is also possible to make a 'link' entry lib -> lib64 to
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get over this, but obviously this is not available if
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$prefix/lib already exists, and contains entries.
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Running fgfs, and others, with OSG shared libraries:
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You must also deal with the executable loader being
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able to find the OSG shared libraries when running fgfs,
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and others, through perhaps using :-
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$ export LD_LIBRARY_PATH=/path/to/osg/lib[64][:/other/paths]
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or more permanently using a '.conf' file in the
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/etc/ld.so.conf.d directory, and running
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$ sudo ldconfig -v to update the 'cache'.
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