Compiling with boost in Xcode 6.0.1

[Elendurwen]

I am trying to compile Ogre3D (C++) using Xcode 6.0.1. Ogre depends on the boost library, which is the problem. As far as I understand it, boost does not build by default in a way that allows Xcode's compiler to use it.

I first tried to install boost through ports, using

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port install boost +universal

as suggested on Ogre forums. When that didn't work, I uninstalled boost, got rid of any references to it from /opt/local/include and /opt/local/lib and tried to install it manually to /Developer/SDKs/boost from the boost web site download, according to their instructions. I even tried the fix suggested on http://stackoverflow.com/questions/8486 ... clang-libc, that is supposed to build boost for compatibility with Xcode but that didn't work either.

I always get errors like:

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Ignoring file /Developer/SDKs/boost/lib/libboost_date_time.a, file was built for archive which is not the architecture being linked (i386): /Developer/SDKs/boost/lib/libboost_date_time.a
    Undefined symbols for architecture i386:
      "boost::this_thread::disable_interruption::disable_interruption()", referenced from:
          boost::shared_mutex::lock() in OgreWorkQueue.o

In Xcode build settings, I have these specifications:

- Architecture: Universal (x86_64,i386)
- Compiler: Apple LLBm 6.0

Xcode's build command output is:

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build/lib/macosx/Debug/Ogre.framework/Versions/1.10.0/Ogre normal x86_64
        cd /Developer/SDKs/OgreSDK_latest
        export MACOSX_DEPLOYMENT_TARGET=10.7
        /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -dynamiclib -isysroot/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -L/Developer/SDKs/OgreSDK_latest/build/lib/macosx/Debug -L/opt/local/lib/Debug -L/opt/local/lib -F/Developer/SDKs/OgreSDK_latest/build/lib/macosx/Debug -F/Library/Frameworks -filelist /Developer/SDKs/OgreSDK_latest/build/OgreMain/OGRE.build/Debug/OgreMain.build/Objects-normal/x86_64/Ogre.LinkFileList -install_name @executable_path/../Frameworks/Ogre.framework/Versions/1.10.0/Ogre -mmacosx-version-min=10.7 -framework IOKit -framework Cocoa -framework Carbon -framework OpenGL -framework CoreVideo /Developer/SDKs/boost/lib/libboost_thread.a /Developer/SDKs/boost/lib/libboost_date_time.a /Developer/SDKs/OgreSDK_latest/Dependencies/lib/Debug/libfreeimage.a /Developer/SDKs/OgreSDK_latest/Dependencies/lib/Debug/libzzip.a /usr/lib/libz.dylib -stdlib=libc++ -fobjc-link-runtime -single_module -compatibility_version 1.10.0 -current_version 1.10.0 -Xlinker -dependency_info -Xlinker /Developer/SDKs/OgreSDK_latest/build/OgreMain/OGRE.build/Debug/OgreMain.build/Objects-normal/x86_64/Ogre_dependency_info.dat -o /Developer/SDKs/OgreSDK_latest/build/lib/macosx/Debug/Ogre.framework/Versions/1.10.0/Ogre

I am not sure what to do at this point, did anyone manage to solve this problem?

[DanielSefton]

Sadly don't have enough time to give you a direct answer, but note the difference between compiling it with libc++ and libstdc++, Ogre may be built with the latter by default and it will give you those sort of errors if you mix them.

Plus: You don't have to compile boost with Ogre, only really if you require background resource loading

Oh and, it's probably outdated by now, but here's my guide on building boost with Xcode with some pre-existing scripts (which may have been updated since): http://www.danielsefton.com/2012/03/bui ... xcode-4-3/

[Elendurwen]

Thanks for that link, I will go through. I would prefer not to compile with boost, it's been giving me headache! But when I run CMAKE there is no option to remove boost from the project dependencies. Could you please let me know how to do this? Is that a change somewhere in the Xcode project itself?

[DanielSefton]

Setting OGRE_CONFIG_THREADS to 0 in CMake should do the trick.

[Elendurwen]

Ok I think it did - thanks for that!
Now I have another set of compiling errors, which are the same but about libfreeimage

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Undefined symbols for architecture x86_64:
  "std::string::find(char const*, unsigned long) const", referenced from:
      Iex::throwErrnoExc(std::string const&, int) in libfreeimage.a

I did build libfree image though mac ports, with +universal so I guess it's a very similar problem. Can you use ogre without this library or is there a way to fix this that you know about?