Android - How to install .so file?

Ed Buchwalter

I am trying to include openSSL and cURL with my android application.
I have built openSSL and cURL but seem unable to install the libssl.so and the libcrypto.so files to my device.
Though I have now spent many hours I just can't seem to get this to work.
Any help is appreciated!

Regards,
Ed

ekkescorner

@Ed-Buchwalter I'm just about to do the same for openssl and Qt 5.8
Have you followed http://doc.qt.io/qt-5/opensslsupport.html to get the openssl .so libs ?

luca

Hi,
I followed the steps on:
http://doc.qt.io/qt-5/opensslsupport.html
to build Openssl, then I added to my .pro :

LIBS += -L$$PWD/../../openssl/android/ -lcrypto -lssl
INCLUDEPATH += $$PWD/../../openssl/android/openssl-1.0.2h/include/

contains(ANDROID_TARGET_ARCH,armeabi-v7a) {
    ANDROID_EXTRA_LIBS = \
        $$PWD/../../openssl/android/libcrypto.so \
        $$PWD/../../openssl/android/libssl.so
}

for me it worked... hope it hepls!

Luca

ekkescorner

and from another thread @Joseneas added the .so this way:

To package the .so files into apk, add the below code into .pro file of the project:

contains(ANDROID_TARGET_ARCH,arm) {
    # update the path of the libraries where you put in your project.
    # I put in: myapp/android/libs/openssl/armeabi-v7a/:
    ANDROID_EXTRA_LIBS = \
        $$PWD/android/libs/openssl/armeabi-v7a/libcrypto.so \
        $$PWD/android/libs/openssl/armeabi-v7a/ibssl.so
}

ekkescorner

@luca so you don't copy the .so into the project - you always refer to one location. makes sense if many projects are using the libs

luca

@ekkescorner Yes, I use the same .so for every project.

ekkescorner

@luca I'm not the cmd line expert - only a mobile app developer ;-)

so please excuse my questions. am I right with my commands below ?

CC=<ANDROID_NDK_PATH>/toolchains/arm-linux-androideabi-<VER>/prebuilt/<NDK_HOST>/bin/arm-linux-androideabi-gcc
AR=<ANDROID_NDK_PATH>/toolchains/arm-linux-androideabi-<VER>/prebuilt/<NDK_HOST>/bin/arm-linux-androideabi-ar
ANDROID_DEV=<ANDROID_NDK_PATH>/platforms/<ANDROID-PLATFORM>/arch-arm/usr

will execute inside Terminal on OSX
is -4.9 the correct version ?
the <NDK_HOST> I found following the path as darwin-x86_64
as <ANDROID-PLATFORM> I used the newest from r10e: android-21

cd <directory-where extracted openssl>/openssl-1.0.2k
export ANDROID_NDK_ROOT=/daten/_android/android-ndk-r10e
CC=$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc
AR=$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-ar
ANDROID_DEV=$ANDROID_NDK_ROOT/platforms/android-21/arch-arm/usr

as next

./Configure shared android or android-armv7

don't know what to choose - probably this:

./Configure shared android-armv7

then doing the mentioned replaces and finally

make build_libs

will do the job ?

thanks

luca

@ekkescorner I followed those steps but I'm working on Linux so I can't confirm it works on Mac.

I used:

./Configure shared android-armv7

because that way you can cover almost all current Android devices.

ekkescorner

@luca thx - will try it out

ekkescorner

@luca did all.
configuration was done

did changes in Makefile

then make build_libs fails:

Configured for android-armv7.
ekkes-MBP:openssl-1.0.2k admin$ make build_libs
making all in crypto...
/usr/bin/perl ../util/mkbuildinf.pl "gcc -I. -I.. -I../include  -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=armv7-a -mandroid -I/include -B/lib -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DAES_ASM -DBSAES_ASM -DGHASH_ASM" "android-armv7" >buildinf.h
gcc -I. -I.. -I../include  -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=armv7-a -mandroid -I/include -B/lib -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DAES_ASM -DBSAES_ASM -DGHASH_ASM   -c -o cryptlib.o cryptlib.c
clang: error: unknown argument: '-mandroid'
make[1]: *** [cryptlib.o] Error 1
make: *** [build_crypto] Error 1

any idea what went wrong ?

luca

@ekkescorner Do you get the same error if you try

./Configure shared android

?

ekkescorner

@luca just asked in interests list - perhaps I got some info there

luca

@ekkescorner Ok,
anyway I just tryed on my Linux PC and it worked:

cd openssl-1.0.2h
export AR=/home/luca/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ar
export CC=/home/luca/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc
export LD=/home/luca/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld
export ANDROID_DEV=/home/luca/android-ndk-r10e/platforms/android-21/arch-arm/usr
./Configure shared android-armv7
make depend
make build_libs

ekkescorner

@luca difference is
OSX
1.0.2k

and what does
make depend ?

ekkescorner

@luca just also tried 1.0.2.h

got info to execute make depend

then error:

Configured for android-armv7.

*** Because of configuration changes, you MUST do the following before
*** building:

	make depend
ekkes-MBP:openssl-1.0.2h admin$ make depend
making depend in crypto...
clang: error: unknown argument: '-mandroid'
make[1]: *** [local_depend] Error 1
make: *** [depend] Error 1

ekkescorner

@luca said in Android - How to install .so file?:

@ekkescorner Do you get the same error if you try
./Configure shared android
?

got the same error

who has successfully installed openssl for Qt 5.8 on OSX ?

ekkescorner

@luca said in Android - How to install .so file?:

@ekkescorner Ok,
anyway I just tryed on my Linux PC and it worked:
cd openssl-1.0.2h

...

export LD=/home/luca/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld

why have you added this line ?
and should I use 'export AR= and CC=' instead of AR= and CC= in docs ?

thx again

ekkescorner

found https://github.com/openssl/openssl/issues/1531 and https://bruteforce.gr/bypassing-clang-error-unknown-argument.html
and tried to add at first line
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future

didn't work - same error
also I guess GCC is used because of
CC=$ANDROID_NDK_ROOT/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc
so the error shouldn't happen ?

also found https://github.com/android-ndk/ndk/issues/5 mentioning 1.0.2g added -mandroid,
so I tried downloading 1.0.2f
same error

I'm lost now - no one out there on OSX already added openssl libs to Qt 5.8 ?

thx
ekke

luca

@ekkescorner I used "export" because otherwise my bash terminal didn't use the environmental variables.
LD is used to force the android version of the linker. Don't know if you can avoid it.

ekkescorner

@luca said in Android - How to install .so file?:

@ekkescorner I used "export" because otherwise my bash terminal didn't use the environmental variables.
LD is used to force the android version of the linker. Don't know if you can avoid it.

did the same

now another error - probably the LD is only needed on Linux ?

ekkes-MBP:openssl-1.0.2k admin$ make build_libs
making all in crypto...
/usr/bin/perl ../util/mkbuildinf.pl "/daten/_android/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc -I. -I.. -I../include  -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=armv7-a -mandroid -I/include -B/lib -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DAES_ASM -DBSAES_ASM -DGHASH_ASM" "android-armv7" >buildinf.h
/daten/_android/android-ndk-r10e/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin/arm-linux-androideabi-gcc -I. -I.. -I../include  -fPIC -DOPENSSL_PIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -march=armv7-a -mandroid -I/include -B/lib -O3 -fomit-frame-pointer -Wall -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DAES_ASM -DBSAES_ASM -DGHASH_ASM   -c -o cryptlib.o cryptlib.c
In file included from cryptlib.c:117:0:
cryptlib.h:62:21: fatal error: stdlib.h: No such file or directory
 # include <stdlib.h>
                     ^
compilation terminated.
make[1]: *** [cryptlib.o] Error 1
make: *** [build_crypto] Error 1