iOS: Ensuring Boost is found in iOSDependencies

[Arkiruthis]

I currently have Boost installed via Macports which is useful for other non-Ogre projects I'm working on.

When trying to build the iOS version of Ogre 1.8, I'm having to set -D OGRE_CONFIG_THREADS=0 to disable Boost as it seems to keep finding the (i386) ones in:

/opt/local/include
/opt/local/lib

instead of:

/../OGRE_SRC/iOSDependencies/include
/../OGRE_SRC/iOSDependencies/lib

I sense this is happening at the default Cmake Find Package level and I'm not sure of the correct edit to override this?

(update - will try setting -D Boost_INCLUDE_DIR etc ... )

[Arkiruthis]

Nope... setting -D Boost_INCLUDE_DIR=/path_to/iOSDependencies/include -D Boost_LIBRARY_DIR=/path_to/iOSDependencies/lib seems to have made no difference.

Cmake is inexplicably still looking in /opt/local for these.

[Arkiruthis]

I ended up removing boost. i.e., sudo port uninstall boost

Sure enough, Cmake found the right libs this time in iOSDependencies.

As usual, it was only afterwards I found the following in FindBoost.cmake (in the Cmake installation) for anyone searching this topic in future:-

1. Boost_NO_SYSTEM_PATHS set to TRUE
2. Boost_DIR needs to be an environment variable in order to point to a Boost installation (include/lib), otherwise it has to point to a BoostConfig.cmake

Code: Select all

#   Boost_DIR or                 The preferred installation prefix for searching for
#   BOOST_ROOT or BOOSTROOT      Boost.  Set this if the module has problems finding
#                                the proper Boost installation.
#
#                                Note that Boost_DIR behaves exactly as <package>_DIR
#                                variables are documented to behave in find_package's
#                                Config mode.  That is, if it is set as a -D argument
#                                to CMake, it must point to the location of the
#                                BoostConfig.cmake or Boost-config.cmake file.  If it
#                                is set as an environment variable, it must point to
#                                the root of the boost installation.  BOOST_ROOT and
#                                BOOSTROOT, on the other hand, will point to the root
#                                in either case.
#
#                                To prevent falling back on the system paths, set
#                                Boost_NO_SYSTEM_PATHS to true.
#
#                                To avoid finding boost-cmake installations, set
#                                Boost_NO_BOOST_CMAKE to true.

Hindsight being a great thing, now I have to face the 5 million year wait for "sudo port install boost" again...

UPDATE

If anyone has this same problem, you can make a small edit to the script here:
http://ogre3d.org/tikiwiki/tiki-index.p ... 0iPhone%29

change:

Code: Select all

cmake -D OGRE_BUILD_PLATFORM_APPLE_IOS=1 -G Xcode $SRC

to:

Code: Select all

cmake -D OGRE_BUILD_PLATFORM_APPLE_IOS=1 -D BOOST_ROOT:PATH=$SRC/iOSDependencies -D Boost_NO_SYSTEM_PATHS:BOOL=ON -G Xcode $SRC

This will make sure that no pesky run-of-the-mill boost libraries get picked.