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CMake read me updates - document PREFIX_PATH

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James Turner 2011-10-24 09:10:06 +01:00
parent 2bc5604797
commit fd06e568ea
1 changed files with 18 additions and 5 deletions
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23
README.cmake
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@ -20,9 +20,19 @@ Note the install prefix is automatically searched for required libraries
and header files, so if you install PLIB, OpenSceneGraph and SimGear to the
same prefix, most configuration options are unnecessary.
To specify that a particular dependency is in a non-standard location, most
libraries support an environment variable - eg PLIBDIR or OSG_ROOT - to
allow precise selection.
If for some reason you have a dependency (or several) at a different prefix,
you can specify one or more via CMAKE_PREFIX_PATH:
cmake ../flightgear -DCMAKE_PREFIX_PATH="/opt/local;/opt/fgfs"
(note the use of semi-colons to specify multiple prefix paths)
Standard prefixes are searched automatically (/usr, /usr/local, /opt/local)
Most dependencies also expose an environment variable to specify their
installation directory explicitly eg OSG_DIR or PLIBDIR. Any of the methods
described above will work, but specifying an INSTALL_PREFIX or PREFIX_PATH is
usually simpler.
By default, we select a release build. To create a debug build, use
@ -34,7 +44,8 @@ Debug builds will automatically use corresponding debug builds of required
libraries, if they are available. For example you can install debug builds of
SimGear and OpenSceneGraph, and a debug FlightGear build will use them.
(Debug builds of libraries have the 'd' suffix by default)
(Debug builds of libraries have the 'd' suffix by default - Release builds
have no additional suffix)
Note most IDE projects (eg Xcode and Visual Studio) support building all the
build types from the same project, so you can omit the CMAKE_BUILD_TYPE option
@ -51,7 +62,9 @@ configurations, eg
To set an optional feature, do
cmake ../flightgear -DFEATURE_NAME=ON
cmake ../flightgear -DFEATURE_NAME=ON
(or 'OFF' to disable )
To see the variables that can be configured / are currently defined, you can
run one of the GUI front ends, or the following command: