Building OpenSSL for android

WayneGoetz

Hi,

I am trying to follow: http://doc.qt.io/qt-5/opensslsupport.html
But when doing

make build_libs

I get:

cryptlib.h:62:21: fatal error: stdlib.h: No such file or directory

Is there an newer version of the documentation?

WayneGoetz

Well, I used the prebuild libraries from: https://github.com/emileb/OpenSSL-for-Android-Prebuilt.git

th.thielemann

For linux on arm I fixed this. Fix was required because armv7 was not supported by openssl Configure.
First I changed Configure file:
Searched for line starting with "linux-armv4" and included my own configuration line here.
"linux-armv7", "gcc: -DTERMIO -D__ARM_ARCH_7A__ -O3 -march=armv7-a -I$(SYSROOT)/usr/include/ -B$(SYSROOT)/lib -fomit-frame-pointer -Wall::-D_REENTRANT::-ldl:BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR:${armv4_asm}:dlfcn:linux-shared:-fPIC::.so.$(SHLIB_MAJOR).$(SHLIB_MINOR)",

The line is references in the following build steps:
Adapt the make to your environment.

ToolChainName=arm-linux-gnueabihf
ToolChainInstallDirectory=/myfolder/linux-devkit/sysroots/i686-arago-linux/usr/bin
export SYSROOT=/myfolder/linux-devkit/sysroots/cortexa8hf-vfp-neon-3.8-oe-linux-gnueabi
export CC="$ToolChainInstallDirectory/$ToolChainName-gcc -march=armv7-a --sysroot=$SYSROOT"
make depend
make build_libs

Eddie

Personally I am paranoid about packaging prebuilt OpenSSL libs I find laying bout the Internet in my customer's apps. I will NOT use them.

Reverting to use Android NDK r10e solved build problems I had on macOS.

This script builds arm, arm7, and x86. I could not get Ubuntu 18.04 build of OpenSSL to work even with r10e.

https://github.com/esutton/android-openssl

FIle: myproject.pro

android {
    # Copy build-output of https://github.com/esutton/android-openssl
    # to /platform/android/lib/openssl/
    # Android >= 6.0 requires apps to install their own libcrypto.so and libssl.so
    equals(ANDROID_TARGET_ARCH, armeabi-v7a) {
        ANDROID_EXTRA_LIBS += $$files($${PWD}/platform/android/lib/openssl/arch-armeabi-v7a/*.so)
    }
    equals(ANDROID_TARGET_ARCH, x86)  {
        ANDROID_EXTRA_LIBS += $$files($${PWD}/platform/android/lib/openssl/arch-x86/*.so)
    }
}