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Add -d:androidNDK to fix echo on Android NDK builds. (#12203)

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* Add -d:echoToAndroidLog to fix echo.

* Change to androidNDK and add docs.

* Some word changes to docs.
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treeform 2019-09-17 14:00:06 -07:00 • committed by Andreas Rumpf
commit 910ed5888e
2 changed files with 46 additions and 19 deletions
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doc/nimc.rst
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@ -281,6 +281,20 @@ The MinGW-w64 toolchain can be installed as follows::
CentOS: yum install mingw32-gcc | mingw64-gcc - requires EPEL
OSX: brew install mingw-w64
Cross compilation for Android
=============================
There are two ways to compile for Android: terminal programs (Termux) and with the NDK (Android Native Development Kit).
First one is to treat Android as a simple linux and use `Termux <https://wiki.termux.com>`_ to connect and run the nim compiler directly on android as if it was linux. These programs are console only apps
that can’t be distributed in the Play Store.
Use regular ``nim c`` inside termux to make Android terminal apps.
Android apps are written in Java, to use Nim inside an Android app you need a small Java stub that calls out to a native library written in Nim using the `NDK <https://developer.android.com/ndk>`_. You can also use `native-acitivty <https://developer.android.com/ndk/samples/sample_na>`_ to have the Java stub be auto generated for you.
Use ``nim c -c --cpu:arm --os:android -d:androidNDK`` to generate the C source files you need to include in your Android Studio project. Add the generated C files to CMake build script. Then do the final compile with Android Studio which uses gradle to call CMake to compile the project.
Cross compilation for Nintendo Switch
=====================================