bykim555 commented on issue #13724:
URL:
https://github.com/apache/incubator-mxnet/issues/13724#issuecomment-737902428
1.first, i use ndk21,
android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin and
export CC=armv7a-linux-androideabi23-clang
export CXX=armv7a-linux-androideabi23-clang++
2.then i build openblas, everything is ok
3. and then i build my libmxnet_predict.so, many issues come out, i solved
them one by one
need to modify the 'makefile' in amalgamation, besides modify OpenBLAS path,
need to change your export PATH to the
android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin and
exportCC=armv7a-linux-androideabi23-clang, and export
XX=armv7a-linux-androideabi23-clang++, and add more include path in the CFLAGS:
-I../include -I${TPARTYDIR}/dmlc-core/include
-I${TPARTYDIR}/tvm/nnvm/include -I${TPARTYDIR}/mshadow
-I${TPARTYDIR}/dlpack/include -I${TPARTYDIR}/tvm/nnvm
-I${TPARTYDIR}/ps-lite/include,
also need to add c++11 support in the CFLAGS, "LDFLAGS+=
-Wl,--no-warn-mismatch -lm_hard" => LDFLAGS+= -Wl,--no-warn-mismatch -lm ....
after 'amalgamation.py' in amalgamation add blacklist = [ 'x86intrin.h'] ,
successfully build
then i push the libmxnet_predict.so and the test program to the deviece it
will run and failed in the thread_local variant which are is_train_ and
is_recording_, so i change them directly to bool false, then the test program
finnally work, but the result is different with PC, and it is definitely has
something with the support with ARM i guess, so could you please help verify
and fix this issue?
my error log is : E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.tistory.webnautes.useopencvwithndk_build, PID: 17645
java.lang.UnsatisfiedLinkError: dlopen failed: library
"E:/2020/WorkSpace/AndroidStudioProjects_backup/UseOpenCVwithndkbuild/app/build/intermediates/ndkBuild/debug/obj/local/armeabi-v7a/libmxnet_predict.so"
not found
at java.lang.Runtime.loadLibrary(Runtime.java:372)
at java.lang.System.loadLibrary(System.java:1076)
at
com.tistory.webnautes.useopencvwithndk_build.MainActivity.<clinit>(MainActivity.java:48)
at java.lang.Class.newInstance(Native Method)
at android.app.Instrumentation.newActivity(Instrumentation.java:1095)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3083)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3349)
at android.app.ActivityThread.access$1100(ActivityThread.java:221)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:158)
at android.app.ActivityThread.main(ActivityThread.java:7224)
at java.lang.reflect.Method.invoke(Native Method)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
I changed ndk version and api version... but error is same...
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