#Use cmake linux install#
#Use cmake linux code#

#Use cmake linux install#

Install Boost, OpenAL, ALUT, PLIB and other OpenSceneGraphDependencies (eg, libpng).

Д«uild Environment & Dependencies Linux / Unix Note as of 06/2021, people may have to build using at least OSG 3.6

we should have better isolation from system headers / versions of things.

We link to a target which is an alias for either our built-in version or the system one (via an IMPORTED target)

#Use cmake linux code#

system vs built-in dependencies is handled vis ALIAS targets, so most other code doesnвЂ™t care.

transitive dependencies are handled automatically (or at least, thatвЂ™s the ideaвЂ¦), which simplifies things in many places (eg, audio library handling).

we now use modern Cmake style nearly everywhere, i.e targets-as-objects for an OOP-style build system.

James pushed a large overhaul of the Cmake build files for FlightGear: LetвЂ™s see if reality corresponds to all the theory aboveВ :) And you shouldnвЂ™t see any behavioural changes because of this either.

None of this affects the release branches of course: they continue to work with OSG 3.2, GCC 4.x, Qt 5.4 and CMake 3.0. The idea of doing this /now/ is that the build deps wonвЂ™t change again during the next two years, barring any surprises. If you choose to go and download an ancient version of CMake or Qt, on either platform thatвЂ™s your problem to fix - but youвЂ™ll get a configuration error at least. Windows and macOS should be unaffected BTW - because on those platforms you're always running something you downloaded which is fairly up to date. Things like Boost -> Std stuff, Cmake targets-as-objects support (eg, target_compile_features can be used now). There are plenty more cleanups that can be done based on thisВ : especially on the CMake and C++ sides. (Or use ClangвЂ¦) For both of these distros there are officially supported ways to get newer GCCs (weвЂ™re actually using GCC 9 on Jenkins now.), so I donвЂ™t expect this to be a problem.ДЄs part of this we now require CMake 3.10, Qt 5.9 and OSG 3.4.1, and James started removing various legacy pieces from next around this. If youвЂ™re on a вЂsomewhat olderвЂ™ Linux, the baselines being Ubuntu 18.04 (their previous LTS) and CentOS 7 (which our Jenkins runs), you should also be fine except for GCC, where you will need a version supporting C++14: in practice this means GCC 5.x or higher. If youвЂ™re developing on вЂsomething fairly recentвЂ™, you shouldnвЂ™t see any difference except it would be a wise time to wipe your build dirs and re-CMake from clean. James has pushed some configuration changes to next (SG+FG) to raise various required versions of things.