Working build scripts for OpenSSL libcrypto and libssl static and dynamic libraries primarily for using on Android. Mac, and Linux build script are kept and updated as well. Windows version removed from current repo, look to original one for the instructions.

This repo took best workable ideas from ekke/android-openssl-qt and couchbaselabs/couchbase-lite-libcrypto repos - many thanks to their authors! More ideas about these scripts creation could be found there. Resulting scripts successfully do all for you from downloading and extracting openssl and generating libs for x86, armeabi-v7a, arm64-v8a architectures.

Default OpenSSL version is 1.0.2o as currently used in Qt Creator.

$ git clone https://github.com/akontsevich/openssl-android-build.git
$ export OPENSSL_VERSION="openssl-1.0.2o"

Run the following command on a Mac

$ ./generate-headers-mac.sh

or Linux machine:

$ ./generate-headers.sh

The headers will be output at libs/include.

1. Download Android NDK

Note. You need to download FULL NDK version as Android Studio ships reduced version which may cause build failure.

2. Mac OSX or Linux Machine

1. Make sure that you have the ANDROID_NDK_HOME variable defined. For example,

#.bashrc:
export ANDROID_NDK_HOME=~/Android/android-ndk-r10e

or

 #.bashrc:
 export ANDROID_NDK_HOME=~/Android/android-ndk-r18b

1. Run the build script. The binaries will be output at libs/android

$ ./build-android.sh

1. Run the build script. The binaries will be output at libs/android/clang

Note. More modern NDK version recommended to use there:

export ANDROID_NDK_HOME=~/Android/android-ndk-r18b
$ ./build-android-clang.sh

1. Downdload and install Emscripten: http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html
2. Enter into emsdk dir and activate PATH and other environment variables in the current terminal

source ./emsdk_env.sh

1. Run the build script. The binaries will be output at libs/wasm

$ ./build-emscripten.sh

1. XCode
2. makedepend (if you don't have one)

$ homebrew install makedepend

or

$ brew install makedepend

Run the build script. The binaries will be output at libs/osx and libs/ios. The osx and ios binaries are universal libraries.

$ ./build-osx-ios.sh

1. GCC
2. makedepend (if you don't have one) On Ubuntu:

$ sudo apt-get install xutils-dev

In openSUSE:

$ sudo zypper in makedepend

Run the build script. The binaries will be output at libs/linux.

$ ./build-linux.sh

Modify .pro file in a Qt project: insert this line into your .pro:

include(android-build.pri)

Assume build libraries and headers copied to ./3rdparty dir or your source tree. Following structure considers we build clang library version:

$$PWD/3rdparty
    └── include
        └── openssl
            └── *.h
    └── libs/llvm
            ├── arm64-v8a
            │   ├── libcrypto.a
            │   ├── libcrypto.so
            │   ├── libssl.a
            │   └── libssl.so
            ├── arch-armeabi-v7a
            │   ├── libcrypto.a
            │   ├── libcrypto.so
            │   ├── libssl.a
            │   └── libssl.so
            └── arch-x86
                ├── libcrypto.a
                ├── libcrypto.so
                ├── libssl.a
                └── libssl.so

android {
INCLUDEPATH += $$absolute_path($$PWD/3rdparty/include)

equals(ANDROID_TARGET_ARCH, arm64-v8a) {
    LIBPATH = $$absolute_path($$PWD/3rdparty/libs/llvm/arm64-v8a)
}

equals(ANDROID_TARGET_ARCH, armeabi-v7a) {
    LIBPATH = $$absolute_path($$PWD/3rdparty/libs/llvm/armeabi-v7a)
}

LIBS += \
    -L$$LIBPATH \
    -lssl -lcrypto

ANDROID_EXTRA_LIBS += \
    $$LIBPATH/libssl.so \
    $$LIBPATH/libcrypto.so
}