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Merge pull request #4451 from stephan57160/master

Problem: Android build documentation is outdated.
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Luca Boccassi 2022-10-24 23:10:30 +02:00 committed by GitHub
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## Prerequisites ## Prerequisites
You need the Android Native Development Kit (NDK) installed. See The last known NDK is automatically downloaded, if not specified otherwise.
[here](https://developer.android.com/ndk) to download it.
This project is tested against Android NDK version r25. ## Configuration
If you installed version r25 all you have to do is to expose the NDK root This project is tested against Android NDK version r25, but should
directory as environment variable, e.g: support older ones too.
export ANDROID_NDK_ROOT=$HOME/android-ndk-r25 This project uses NDK `android-ndk-r25`, by default, but you can specify
a different one:
If you installed another version you have to expose the NDK root directory as export NDK_VERSION=android-ndk-r23c
well as the NDK version, e.g:
export ANDROID_NDK_ROOT=$HOME/android-ndk-r17c If you already have installed your favorite NDK somewhere, all you have to
export NDK_VERSION=android-ndk-r17c do is to export and set NDK_VERSION and ANDROID_NDK_ROOT environment
variables, e.g:
To specify the minimum sdk version set the environment variable below: export NDK_VERSION=android-ndk-r23b
export ANDROID_NDK_ROOT=$HOME/${NDK_VERSION}
**Important:** ANDROID_NDK_ROOT must be an absolute path !
If you specify only NDK_VERSION, ANDROID_NDK_ROOT will be automatically set
to its default:
export ANDROID_NDK_ROOT=/tmp/${NDK_VERSION}
To specify the minimum SDK version set the environment variable below:
export MIN_SDK_VERSION=21 # Default value if unset export MIN_SDK_VERSION=21 # Default value if unset
To specify the prefix directory set the environment variable below: To specify the build directory set the environment variable below:
export ANDROID_BUILD_DIR=./builds/android/prefix/<android_arch> # Default value if unset export ANDROID_BUILD_DIR=${HOME}/android_build
**Important:** ANDROID_BUILD_ROOT must be an absolute path !
All libraries will be generated under:
${ANDROID_BUILD_DIR}/prefix/<arch>/lib
where <_arch_> is one of `arm`, `arm64`, `x86` or `x86_64`.
You can also check configuration variables in `build.sh` itself, in its
"Configuration & tuning options" comment block.
The variable CURVE accepts 3 different values:
"" : LIBZMQ is built without any encryption support.
"libsodium" : LIBZMQ is built with LIBSODIUM encryption support (see below).
"tweetnacl" : LIBZMQ is build with embedded encryption support.
## LIBSODIUM
LIBSODIUM is built along with LIBZMQ, when CURVE="libsodium".
- If you have your own clone of LIBSODIUM, set LIBSODIUM_ROOT to point to
its folder.
- If the variable LIBSODIUM_ROOT is not set, LIBZMQ will look for a folder
'libsodium' close to his own one.
- If no folder 'libsodium' exists, then LIBZMQ will clone LIBSODIUM from its
official STABLE branch.
## Build ## Build
In the android directory, run: See chapter [Configuration](#configuration) for configuration options and
other details.
Select your prefered parameters:
export XXX=xxx
export YYY=yyy
...
And, in the android directory, run:
./build.sh [ arm | arm64 | x86 | x86_64 ] ./build.sh [ arm | arm64 | x86 | x86_64 ]
Parameter selection and the calls to build.sh can be located in a
SHELL script, like in ci_build.sh.
## Dockerfile
An example of Docker file is provided, for Ubuntu 22.04
Minimal changes are required to support Debian 9 to 11.
Minimal changes are required to support CentOS (7 only), Rocky Linux (8 & 9),
and many Fedora (22 to 37).