how to build DLIB for iOS

ios cmake dlib
Rob Sanders picture Rob Sanders · Jan 4, 2016 · Viewed 13.1k times · Source

I'm trying to build DLIB for an iOS project. Running the cmake results in a libdlib.a and a load of .o files.

When I add the library to an Xcode project I get warning that the library hasn't been built for arm64.

My question is two-part:

  1. How can I build DLIB for iOS (I tried cmake **path_to_source** -DCMAKE_OSX_ARCHITECTURE="arm64" but it caused loads of errors e.g. unknown type name '__uint32_t'; did you mean '__uint128_t')?
  2. What is the purpose of all the .o files that get built when you run cmake? Do I need to include them in an Xcode project?

Answer

Rob Sanders picture Rob Sanders · Jan 28, 2016

I finally figured out how to do this:

Requirements

  • X11 (on a mac you can just open the X11 app and if X11 isn't installed it'll take you to the download).
  • Xcode
  • cmake (you can use home-brew for that)

Steps

  • In terminal make the lib-xx.xx/examples your root

  • Run:

    mkdir build

    cd build

    cmake -G Xcode ..

    cmake --build . --config Release

This will create a folder called dlib_build in which you can find an Xcode project that compiles the library. In the build settings of that Xcode project you can set the build architecture and SDK for any Xcode supported OS you like!

EDIT:

You have to include a lot of custom compiler flags and 3rd party libraries to get dlib to work in a project. Check out the examples.xcproject build settings.

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