65 lines
1.7 KiB
Text
65 lines
1.7 KiB
Text
ifdef::env-github[]
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:note-caption: :information_source:
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endif::[]
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= Building for iOS (and tvOS, watchOS)
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NOTE: This work has had only minimal validation. As always, _caveat emptor_.
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== Pre-Requisites
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macOS::
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As far as we know, the only way to build iOS applications is on a
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macOS host system.
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Xcode::
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You will need Xcode. We tested this with Xcode 9.3.
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CMake::
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We tested this with CMake 3.9. Other versions may work.
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iOS cmake toolchain file::
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At the time of this writing (May 28, 2018), the toolchain file
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located at https://github.com/leetal/ios-cmake is appears to work
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reasonably well.
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== Steps
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When building for iOS and similar targets, only static libraries may be built.
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(This is good for avoiding dependency nightmares anyway.)
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Using the above toolchain file, we can build for iOS using
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the CMake standard CMAKE_TOOLCHAIN_FILE macro, and using
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the IOS_PLATFORM macro to set the target. (See the iOS CMake
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toolchain README for valid options; we select "OS" for iOS.)
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The test suite and command line tools will automatically be removed
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from the build, since they aren't interesting or useful in cross-compile
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environment. (There is no way to run them.)
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If you have checked out this repository in $SRC, the following should work:
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[source, sh]
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----
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% cd $SRC
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% mkdir ios-build
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% cd ios-build
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% git clone https://github.com/leetal/ios-cmake
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% cmake -G Xcode \
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-DCMAKE_TOOLCHAIN_FILE=`pwd`/ios-cmake/ios.toolchain.cmake \
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-DIOS_PLATFORM=OS ..
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----
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Then you can build using Xcode, or simply use cmake to drive the build:
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[source, sh]
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----
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% cmake --build .
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----
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Extra effort may be required to enable the use of mbedTLS (NNG does not
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at the time of writing support Secure Transport. See issue #497 for status.)
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