I'm trying to use some of the compiled boost libraries for an iOS project. Ideally, it would be nice to get a framework, but getting anything which works would be great. I've tried following the instructions here http://goodliffe.blogspot.com/2010/09/building-boost-framework-for-ios-iphon...http://www.google.com/url?q=http%3A%2F%2Fgoodliffe.blogspot.com%2F2010%2F09%2Fbuilding-boost-framework-for-ios-iphone.html&sa=D&sntz=1&usg=AFQjCNEQozNJiNIHXY8-fi7ui3zqopCJbw to build a boost framework, making the obvious changes to the version numbers of the SDK and Boost, and swapping the compiler to llvm-gcc-4.2 because I don't seem to have gcc-4.2. However, I get errors like this: boostoniphone/src/boost_1_52_0/tools/build/v2/build/feature.jam:767: in expand-composites from module feature error: explicitly-specified values of non-free feature toolset-darwin:version conflict error: existing values: 4.2.1~iphonesim 6.0.0~iphonesim error: value from expanding toolset-darwin:version6.0.0~iphonesim : 6.0.0~iphonesim I've also been trying this approach here http://www.a-coding.com/2011/01/building-boost-for-ios.htmlhttp://www.google.com/url?q=http%3A%2F%2Fwww.a-coding.com%2F2011%2F01%2Fbuilding-boost-for-ios.html&sa=D&sntz=1&usg=AFQjCNHs5NsV015BrggYWqfl20UWF6JAHA which seems to be building most of the .a files OK. I'm not particularly experienced with build systems and libraries (I do algorithms and statistics usually) so I have a few of questions: Is there some obvious way to make the framework script work? Is there some way to just use the .a files I'm getting from the second approach and bundle them up? Or do I just add the .a files generated by the second approach to my project and be done with it? Has anyone else done this by another method, or can suggest how to set user-config.jam to get the libraries I want? Thanks, Daniel