Comment by Amr Aboelela (JIRA)

I am finally able to run an Android app using a swift library. The main fix is to change the icu lib names to use swift suffix. I'll generate a pull request later to show how to do that in the Android.md file.

Meanwhile, you can check:

https://github.com/amraboelela/swift/blob/android/docs/Android.md

Also you can check what I did in:

https://github.com/amraboelela/SwiftAndroid

Comment by Amr Aboelela (JIRA)

Created pull request #11546

@milseman jblatecky (JIRA User) CodaFi (JIRA User) qasim (JIRA User)

Comment by Amr Aboelela (JIRA)

I was still getting the java.lang.UnsatisfiedLinkError not found error, so I did the following to fix this issue:

in app/build.graddle

I replaced:

defaultConfig {
...
externalNativeBuild {
cmake {
arguments '-DANDROID_PLATFORM=android-14',
'-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=gnustl_static'
}
}
}

With:

defaultConfig {
...
externalNativeBuild {
cmake {
arguments '-DANDROID_PLATFORM=android-14',
'-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=gnustl_static', '-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON'
}
}
}

Now after running, I can see the detailed calls for the compiling commands, so I got the following from Griddle Console in Android Studio:

Build add-swift armeabi-v7a
[1/2] /Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang -target=armv7-none-linux-androideabi --gcc-toolchain=/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot -Dadd_swift_EXPORTS -isystem /Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -D_ANDROID_API_=14 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,-noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -fPIC -MD -MT CMakeFiles/add-swift.dir/add-swift.c.o -MF CMakeFiles/add-swift.dir/add-swift.c.o.d -o CMakeFiles/add-swift.dir/add-swift.c.o -c /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/app/src/main/cpp/add-swift.c
[2/2] : && /Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang -target=armv7-none-linux-androideabi --gcc-toolchain=/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot -fPIC -isystem /Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -D_ANDROID_API_=14 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -Wl,exclude-libs,libgcc.a --sysroot /Users/aaboelela/Library/Android/sdk/ndk-bundle/platforms/android-14/arch-arm -Wl,build-id -Wl,warn-shared-textrel -Wl,fatal-warnings -Wl,fix-cortex-a8 -Wl,-no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libadd-swift.so -o /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libadd-swift.so CMakeFiles/add-swift.dir/add-swift.c.o -landroid -llog /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/libs/armeabi-v7a/libAddSwift.so -lm && :

The Part which causes the problem is: /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/libs/armeabi-v7a/libAddSwift.so

So I created my own shell script app/build.sh and replaced that part with -lAddSwift -L/Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/libs/armeabi-v7a

The full build.sh content is:

mkdir -p CMakeFiles/add-swift.dir

/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang -target=armv7-none-linux-androideabi --gcc-toolchain=/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot -Dadd_swift_EXPORTS -isystem /Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -D_ANDROID_API_=14 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,-noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -fPIC -MD -MT CMakeFiles/add-swift.dir/add-swift.c.o -MF CMakeFiles/add-swift.dir/add-swift.c.o.d -o CMakeFiles/add-swift.dir/add-swift.c.o -c /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/app/src/main/cpp/add-swift.c

/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin/clang -target=armv7-none-linux-androideabi --gcc-toolchain=/Users/aaboelela/Library/Android/sdk/ndk-bundle/toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64 --sysroot=/Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot -fPIC -isystem /Users/aaboelela/Library/Android/sdk/ndk-bundle/sysroot/usr/include/arm-linux-androideabi -D_ANDROID_API_=14 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16 -fno-integrated-as -mthumb -Wa,noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -Wl,exclude-libs,libgcc.a --sysroot /Users/aaboelela/Library/Android/sdk/ndk-bundle/platforms/android-14/arch-arm -Wl,build-id -Wl,warn-shared-textrel -Wl,fatal-warnings -Wl,fix-cortex-a8 -Wl,-no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libadd-swift.so -o /Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/app/build/intermediates/cmake/debug/obj/armeabi-v7a/libadd-swift.so CMakeFiles/add-swift.dir/add-swift.c.o -landroid -llog -lAddSwift -L/Users/aaboelela/android/AmrSwiftAndroid/AddSwiftApp/libs/armeabi-v7a -lm

Then I ran build.sh from terminal as:

app$ ./build.sh

Then I ran the project from Android Studio again then I passed that error.

Comment by Amr Aboelela (JIRA)

Now I am getting this error:

08-23 11:58:59.438 25922-25922/com.example.addswift A/SwiftRuntime: dlopen() failed on `/system/lib/libcutils.so': dlopen failed: library "/system/lib/libcutils.so" wasn't loaded and RTLD_NOLOAD prevented it

• • • • • • • • • beginning of crash
                  08-23 11:58:59.448 25922-25922/com.example.addswift A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 25922 (xample.addswift)

[ 08-23 11:58:59.451 645: 645 W/ ]
debuggerd: handling request: pid=25922 uid=10061 gid=10061 tid=25922
08-23 11:58:59.671 25957-25957/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
08-23 11:58:59.672 25957-25957/? A/DEBUG: Build fingerprint: 'Android/sdk_phone_armv7/generic:7.0/NYC/3245079:userdebug/test-keys'
08-23 11:58:59.672 25957-25957/? A/DEBUG: Revision: '0'
08-23 11:58:59.672 25957-25957/? A/DEBUG: ABI: 'arm'
08-23 11:58:59.673 25957-25957/? A/DEBUG: pid: 25922, tid: 25922, name: xample.addswift >>> com.example.addswift <<<
08-23 11:58:59.673 25957-25957/? A/DEBUG: signal 6 (SIGABRT), code 6 (SI_TKILL), fault addr -------
08-23 11:58:59.693 25957-25957/? A/DEBUG: Abort message: 'dlopen() failed on `/system/lib/libcutils.so': dlopen failed: library "/system/lib/libcutils.so" wasn't loaded and RTLD_NOLOAD prevented it'
08-23 11:58:59.694 25957-25957/? A/DEBUG: r0 00000000 r1 00006542 r2 00000006 r3 00000008
08-23 11:58:59.694 25957-25957/? A/DEBUG: r4 ad71c584 r5 00000006 r6 ad71c52c r7 0000010c
08-23 11:58:59.695 25957-25957/? A/DEBUG: r8 92565cb0 r9 bef4f2e8 sl 925f31ac fp bef4f218
08-23 11:58:59.695 25957-25957/? A/DEBUG: ip 00000058 sp bef4f1c0 lr ace2932f pc ace2bb7c cpsr 20000010
08-23 11:58:59.730 25957-25957/? A/DEBUG: backtrace:
08-23 11:58:59.730 25957-25957/? A/DEBUG: #00 pc 00048b7c /system/lib/libc.so (tgkill+12)
08-23 11:58:59.731 25957-25957/? A/DEBUG: #1 pc 0004632b /system/lib/libc.so (pthread_kill+34)
08-23 11:58:59.731 25957-25957/? A/DEBUG: #2 pc 0001c6d5 /system/lib/libc.so (raise+10)
08-23 11:58:59.731 25957-25957/? A/DEBUG: #3 pc 00018237 /system/lib/libc.so (__libc_android_abort+34)
08-23 11:58:59.732 25957-25957/? A/DEBUG: #4 pc 00017770 /system/lib/libc.so (abort+4)
08-23 11:58:59.732 25957-25957/? A/DEBUG: #5 pc 004de804 /data/app/com.example.addswift-2/lib/arm/libswiftCore.so

Comment by Amr Aboelela (JIRA)

Created a new bug for this https://bugs.swift.org/browse/SR-5757

I'm afraid that is well beyond my understanding. Any idea why that is trying to be opened? Also does that .so exist at that path? RTLD_NOLOAD should attempt to determine if it's there, but I believe it won't try to actually do the load.