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Building protobuff libs for Android 64 bit (ARM64-v8a) Qt 5.12.4

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  • Pradeep P NP Pradeep P N

    @SGaist

    Below is the script i have for building it.

    export PREFIX=$HOME/ARM64_Protobuf/protobuf/
    export PATH=$HOME/Android/NDK19/aarch64-linux-android-4.9/bin:$PATH
    export SYSROOT=$HOME/Android/NDK19/aarch64-linux-android-4.9/sysroot
    export CC="aarch64-linux-android-clang --sysroot $SYSROOT"
    export CXX="aarch64-linux-android-clang++ --sysroot $SYSROOT"
    
    ../configure \
    --prefix=$PREFIX \
    --host=aarch64-linux-android \
    --with-sysroot="${SYSROOT}" \
    --enable-shared \
    --enable-cross-compile \
    --with-protoc=protoc \
    CFLAGS="-march=arm64-v8a -D__ANDROID_API__=28" \
    CXXFLAGS="-frtti -fexceptions -march=arm64-v8a -D__ANDROID_API__=28" \
    LIBS="-llog -lz -lc++_static"
    
    make -j 2
    
    make install
    

    and i have the error below as

    checking whether to enable maintainer-specific portions of Makefiles... yes
    checking build system type... x86_64-pc-linux-gnu
    checking host system type... aarch64-unknown-linux-android
    checking target system type... aarch64-unknown-linux-android
    checking for a BSD-compatible install... /usr/bin/install -c
    checking whether build environment is sane... yes
    checking for aarch64-linux-android-strip... aarch64-linux-android-strip
    checking for a thread-safe mkdir -p... /bin/mkdir -p
    checking for gawk... no
    checking for mawk... mawk
    checking whether make sets $(MAKE)... yes
    checking whether make supports nested variables... yes
    checking whether UID '1000' is supported by ustar format... yes
    checking whether GID '1000' is supported by ustar format... yes
    checking how to create a ustar tar archive... gnutar
    checking whether make supports nested variables... (cached) yes
    checking for aarch64-linux-android-gcc... aarch64-linux-android-clang --sysroot /home/Android/NDK19/aarch64-linux-android-4.9/sysroot
    checking whether the C compiler works... no
    configure: error: in `/home/ARM64_Protobuf/protobuf/build':
    configure: error: C compiler cannot create executables
    See `config.log' for more details
    make: *** No targets specified and no makefile found.  Stop.
    make: *** No rule to make target `install'.  Stop.
    
    
    C Offline
    C Offline
    Clem3nt
    wrote on last edited by
    #12

    Hello @Pradeep-P-N,

    I'm trying to build protobuf for arm64 and I have the same error. How did you solve the problem?

    Thank you

    Pradeep P NP C 2 Replies Last reply
    0
    • C Clem3nt

      Hello @Pradeep-P-N,

      I'm trying to build protobuf for arm64 and I have the same error. How did you solve the problem?

      Thank you

      Pradeep P NP Offline
      Pradeep P NP Offline
      Pradeep P N
      wrote on last edited by
      #13

      Hi @Clem3nt

      Please share me the error logs. I will check and update you.
      Which proto version you are using ?

      Pradeep Nimbalkar.
      Upvote the answer(s) that helped you to solve the issue...
      Keep code clean.

      1 Reply Last reply
      1
      • SGaistS SGaist

        Glad you succeeded. It would be nice to have a write down of what you did to be able to achieve the build.

        Pradeep P NP Offline
        Pradeep P NP Offline
        Pradeep P N
        wrote on last edited by
        #14

        Hi @SGaist
        Sure, i will try to make the instructions shorter & post it

        Thank you.

        Pradeep Nimbalkar.
        Upvote the answer(s) that helped you to solve the issue...
        Keep code clean.

        1 Reply Last reply
        1
        • C Clem3nt

          Hello @Pradeep-P-N,

          I'm trying to build protobuf for arm64 and I have the same error. How did you solve the problem?

          Thank you

          C Offline
          C Offline
          Chapay
          wrote on last edited by Chapay
          #15

          @Clem3nt

          f...............k
          I spent 2 days :( with this issue

          But now can build any android arch from macOS!
          Sorry I use ndk 16 and not tested for you version (ndk 19)

          #!/bin/sh
          
          ANDROID_NDK_NAME="android-ndk-r16b"
          PROTO_VERSION="v3.11.4"
          
          PROTO_DIR=`pwd`/protobuf
          ANDROID_RESULT_DIR=`pwd`/libprotobuf/android
          NDK_ROOT=`pwd`/ndk
          
          ANDROID_NDK_DIR="$NDK_ROOT/$ANDROID_NDK_NAME"
          
          export ANDROID="/Volumes/Storage/dvlp/android/sdk/sdk"
          export ANDROID_HOME="/Volumes/Storage/dvlp/android/sdk/sdk"
          
          # Env variable for Android NDK.
          export ANDROID_NDK="$ANDROID_NDK_DIR"
          export ANDROID_NDK_HOME="$ANDROID_NDK_DIR"
          
          # Env variable for Android cmake.
          export ANDROID_CMAKE_ROOT="$ANDROID_HOME/cmake/3.6.4111459/"
          export ANDROID_CMAKE="$ANDROID_CMAKE_ROOT/bin/cmake"
          
          if [ -d "$ANDROID_NDK" ]; then
          	echo "EXIST: $ANDROID_NDK"
          else
          	mkdir -p $NDK_ROOT
          	cd $NDK_ROOT	
          	# For Mac OS, change the NDK download link accordingly.
          	wget "https://dl.google.com/android/repository/$ANDROID_NDK_NAME-darwin-x86_64.zip"
          	unzip $ANDROID_NDK_NAME-darwin-x86_64.zip
          fi
          
          echo "******************************************************"
          echo "start checkout https://github.com/google/protobuf.git"
          echo "******************************************************"
          if [ -d "$PROTO_DIR" ]; then
          	cd $PROTO_DIR
          	git fetch origin
          	git reset --hard origin/master
          	git pull 
          	git checkout -b $PROTO_VERSION $PROTO_VERSION
          	git submodule update --init --recursive
          else
          	git clone https://github.com/google/protobuf.git "$PROTO_DIR"	
          	cd $PROTO_DIR
          	git checkout -b $PROTO_VERSION $PROTO_VERSION
          	git submodule update --init --recursive
          fi
          
          echo "******************************************************"
          echo "end checkout https://github.com/google/protobuf.git"
          echo "******************************************************"
          
          function cmakeBuid {
          	export ARCH="$1"
          
          	echo "********************" 	
          	echo "start $ARCH"
          	echo "********************"
          
          	cd "$PROTO_DIR/cmake"
          	mkdir -p $ARCH
          	cd $ARCH
          	
          	INSTALL_DIR="$ANDROID_RESULT_DIR/$ARCH"
          	mkdir -p $INSTALL
          
          	echo "********************************************************" 	
          	echo "start cmake for $ARCH ....."
          	echo "********************************************************"
          
          	$ANDROID_CMAKE \
          		-Dprotobuf_BUILD_PROTOC_BINARIES=OFF \
          	    -Dprotobuf_BUILD_SHARED_LIBS=OFF \
          	    -Dprotobuf_BUILD_EXAMPLES=OFF \
          	   	-Dprotobuf_BUILD_TESTS=OFF \
          	    -DCMAKE_BUILD_TYPE=Release \
          	    -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_DIR/build/cmake/android.toolchain.cmake \
          	    -DCMAKE_INSTALL_PREFIX=$INSTALL_DIR \
          	    -DANDROID_NDK=$ANDROID_NDK \
          	    -DANDROID_TOOLCHAIN=clang \
          	    -DANDROID_ABI=$ARCH \
          	    -DANDROID_NATIVE_API_LEVEL=21 \
          	    -DANDROID_STL=c++_shared \
          	    -DANDROID_LINKER_FLAGS="-llog -lz -lc++_static" \
          	    -DANDROID_CPP_FEATURES="rtti exceptions" \
          	    ..
          
          	$ANDROID_CMAKE --build .    
          
          	echo "********************************************************" 	
          	echo "end cmake for $ARCH ....."
          	echo "********************************************************"	
          	
          	make install
          
          	echo "***** start: copy results *****"
          	if [ -d "$ANDROID_RESULT_DIR/lib/include" ]; then
          		rm -rf "$ANDROID_RESULT_DIR/lib/include"
          	fi	
          	
          	if [ -d "$ANDROID_RESULT_DIR/lib/$ARCH" ]; then
          		rm -rf "$ANDROID_RESULT_DIR/lib/$ARCH"
          	fi		
          	
          	mkdir -p "$ANDROID_RESULT_DIR/lib/$ARCH"
          
          	cp "$INSTALL_DIR/lib/libprotobuf-lite.a" "$ANDROID_RESULT_DIR/lib/$ARCH"
          	cp "$INSTALL_DIR/lib/libprotobuf.a" "$ANDROID_RESULT_DIR/lib/$ARCH"
          	cp -r "$INSTALL_DIR/include" "$ANDROID_RESULT_DIR/include"	
          	echo "***** end: copy results *****"
          
          	rm -rf "$INSTALL_DIR"
          
          	echo "********************" 	
          	echo "end $ARCH"
          	echo "********************"
          }
          
          cmakeBuid "armeabi-v7a"
          cmakeBuid "arm64-v8a"
          cmakeBuid "x86"
          cmakeBuid "x86_64"
          
          1 Reply Last reply
          0
          • C Offline
            C Offline
            Chapay
            wrote on last edited by
            #16

            helpfull link:
            https://tech.pic-collage.com/how-to-cross-compile-google-protobuf-lite-for-android-977df3b7f20c

            command to get avaliable cmake params (stackowerflow):

            cd "../protobufr-repo-dir/cmake"
            mkdir build
            cd build
            cmake ..
            cmake -LA | awk '{if(f)print} /-- Cache values/{f=1}'
            
            Pradeep P NP 1 Reply Last reply
            0
            • C Chapay

              helpfull link:
              https://tech.pic-collage.com/how-to-cross-compile-google-protobuf-lite-for-android-977df3b7f20c

              command to get avaliable cmake params (stackowerflow):

              cd "../protobufr-repo-dir/cmake"
              mkdir build
              cd build
              cmake ..
              cmake -LA | awk '{if(f)print} /-- Cache values/{f=1}'
              
              Pradeep P NP Offline
              Pradeep P NP Offline
              Pradeep P N
              wrote on last edited by Pradeep P N
              #17

              @Chapay
              I had built it with NDK r20b on Ubuntu 16.04 LTS
              And Sorry i was travelling and hence could not respond or update.

              So you were success in building it right ?

              Pradeep Nimbalkar.
              Upvote the answer(s) that helped you to solve the issue...
              Keep code clean.

              C 1 Reply Last reply
              0
              • Pradeep P NP Pradeep P N

                @Chapay
                I had built it with NDK r20b on Ubuntu 16.04 LTS
                And Sorry i was travelling and hence could not respond or update.

                So you were success in building it right ?

                C Offline
                C Offline
                Chapay
                wrote on last edited by Chapay
                #18

                @Pradeep-P-N

                Yes. I used cmake instead configure script

                1 Reply Last reply
                0
                • Pradeep P NP Offline
                  Pradeep P NP Offline
                  Pradeep P N
                  wrote on last edited by Pradeep P N
                  #19

                  Build Instructions on Ubuntu 16.04 LTS

                  Building Android Tool Chain :

                  • Few Dependencies :
                    sudo apt-get install autoconf automake libtool curl make g++ unzip python gcc git

                  • Download NDK - Latest Stable Version ( I used NDK r20b, which was latest during i built it )

                  • You may want to append export NDK=$HOME/<path-to-NDK> to your ~/.bashrc
                    echo $NDK to verify NDK path from above.

                  • Creating the Standalone toolchain.
                    The NDK folder contains default toolchains, or we can build it - Standalone Toolchains (Obsolete)
                    Example

                       $NDK/build/tools/make_standalone_toolchain.py \
                             --arch arm64 \
                             --api 28 \
                             --stl=libc++ \
                             --install-dir=$HOME/<path-to-build-dir>
                  
                  • You may want to append export PATH=$HOME/<path-to-build-dir/bin:$PATH to your ~/.bashrc
                    echo $PATH to verify toolchain path.

                  Building Google’s Protobuf library :

                  • Clone protobuf
                    mkdir $HOME/Android/NDK/google
                   
                    cd $HOME/Android/NDK/google
                  
                    git clone https://github.com/protocolbuffers/protobuf.git
                  
                    cd protobuf
                  
                    git submodule update --init --recursive
                  
                  # Checkout if specific version is needed, example as shown below, else ignore the below command 
                   git checkout -b v3.5.2 v3.5.2
                  
                  
                  • Build a native (x86) version of the protobuf libraries and compiler (protoc)
                    sudo apt-get install curl autoconf libtool build-essential g++

                  In protobuf folder

                  ./autogen.sh
                  
                   mkdir x86_build
                   cd x86_build
                  
                  # x86_pb_install folder should be created manually at below given path then run the below cmd
                  
                   ../configure --prefix=$HOME/Android/NDK/google/x86_pb_install 
                  
                   make install –j4
                  
                   cd ..
                  

                  Libraries will been installed in: $HOME/Android/NDK/google/x86_pb_install/lib
                  protoc will be in: $HOME/Android/NDK/google/x86_pb_install/bin
                  include files will be in: $HOME/Android/NDK/google/x86_pb_install/include

                  • Build the arm64 version of the protobuf libraries:
                   mkdir arm64_build
                  
                   cd arm64_build
                  
                   # arm64_pb_install folder should be created manually at below given path then run the below cmd
                  
                    CC=aarch64-linux-android-clang \
                    CXX=aarch64-linux-android-clang++ \
                    CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" \
                       ../configure --host=aarch64-linux-android \
                       --prefix=$HOME/Android/NDK/google/arm64_pb_install \
                       --with-protoc=$HOME/Android/NDK/google/x86_pb_install/bin/protoc
                  
                    make install –j4
                  
                    cd ..
                  
                  

                  Libraries will been installed in: $HOME/Android/NDK/google/arm64_pb_install/lib
                  protoc will be in: $HOME/Android/NDK/google/arm64_pb_install/bin
                  include files will be in: $HOME/Android/NDK/google/arm64_pb_install/include

                  • Compiling Your Protocol Buffers
                    protoc -I=$SRC_DIR --cpp_out=$DST_DIR $SRC_DIR/file_name.proto

                  @SGaist
                  Hope this helps

                  @Chapay, @Clem3nt
                  If possible please try this and update me.

                  Pradeep Nimbalkar.
                  Upvote the answer(s) that helped you to solve the issue...
                  Keep code clean.

                  C mbruelM 2 Replies Last reply
                  2
                  • Pradeep P NP Pradeep P N

                    Build Instructions on Ubuntu 16.04 LTS

                    Building Android Tool Chain :

                    • Few Dependencies :
                      sudo apt-get install autoconf automake libtool curl make g++ unzip python gcc git

                    • Download NDK - Latest Stable Version ( I used NDK r20b, which was latest during i built it )

                    • You may want to append export NDK=$HOME/<path-to-NDK> to your ~/.bashrc
                      echo $NDK to verify NDK path from above.

                    • Creating the Standalone toolchain.
                      The NDK folder contains default toolchains, or we can build it - Standalone Toolchains (Obsolete)
                      Example

                         $NDK/build/tools/make_standalone_toolchain.py \
                               --arch arm64 \
                               --api 28 \
                               --stl=libc++ \
                               --install-dir=$HOME/<path-to-build-dir>
                    
                    • You may want to append export PATH=$HOME/<path-to-build-dir/bin:$PATH to your ~/.bashrc
                      echo $PATH to verify toolchain path.

                    Building Google’s Protobuf library :

                    • Clone protobuf
                      mkdir $HOME/Android/NDK/google
                     
                      cd $HOME/Android/NDK/google
                    
                      git clone https://github.com/protocolbuffers/protobuf.git
                    
                      cd protobuf
                    
                      git submodule update --init --recursive
                    
                    # Checkout if specific version is needed, example as shown below, else ignore the below command 
                     git checkout -b v3.5.2 v3.5.2
                    
                    
                    • Build a native (x86) version of the protobuf libraries and compiler (protoc)
                      sudo apt-get install curl autoconf libtool build-essential g++

                    In protobuf folder

                    ./autogen.sh
                    
                     mkdir x86_build
                     cd x86_build
                    
                    # x86_pb_install folder should be created manually at below given path then run the below cmd
                    
                     ../configure --prefix=$HOME/Android/NDK/google/x86_pb_install 
                    
                     make install –j4
                    
                     cd ..
                    

                    Libraries will been installed in: $HOME/Android/NDK/google/x86_pb_install/lib
                    protoc will be in: $HOME/Android/NDK/google/x86_pb_install/bin
                    include files will be in: $HOME/Android/NDK/google/x86_pb_install/include

                    • Build the arm64 version of the protobuf libraries:
                     mkdir arm64_build
                    
                     cd arm64_build
                    
                     # arm64_pb_install folder should be created manually at below given path then run the below cmd
                    
                      CC=aarch64-linux-android-clang \
                      CXX=aarch64-linux-android-clang++ \
                      CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" \
                         ../configure --host=aarch64-linux-android \
                         --prefix=$HOME/Android/NDK/google/arm64_pb_install \
                         --with-protoc=$HOME/Android/NDK/google/x86_pb_install/bin/protoc
                    
                      make install –j4
                    
                      cd ..
                    
                    

                    Libraries will been installed in: $HOME/Android/NDK/google/arm64_pb_install/lib
                    protoc will be in: $HOME/Android/NDK/google/arm64_pb_install/bin
                    include files will be in: $HOME/Android/NDK/google/arm64_pb_install/include

                    • Compiling Your Protocol Buffers
                      protoc -I=$SRC_DIR --cpp_out=$DST_DIR $SRC_DIR/file_name.proto

                    @SGaist
                    Hope this helps

                    @Chapay, @Clem3nt
                    If possible please try this and update me.

                    C Offline
                    C Offline
                    Chapay
                    wrote on last edited by
                    #20

                    @Pradeep-P-N Thanks I will try

                    1 Reply Last reply
                    0
                    • Pradeep P NP Pradeep P N

                      Build Instructions on Ubuntu 16.04 LTS

                      Building Android Tool Chain :

                      • Few Dependencies :
                        sudo apt-get install autoconf automake libtool curl make g++ unzip python gcc git

                      • Download NDK - Latest Stable Version ( I used NDK r20b, which was latest during i built it )

                      • You may want to append export NDK=$HOME/<path-to-NDK> to your ~/.bashrc
                        echo $NDK to verify NDK path from above.

                      • Creating the Standalone toolchain.
                        The NDK folder contains default toolchains, or we can build it - Standalone Toolchains (Obsolete)
                        Example

                           $NDK/build/tools/make_standalone_toolchain.py \
                                 --arch arm64 \
                                 --api 28 \
                                 --stl=libc++ \
                                 --install-dir=$HOME/<path-to-build-dir>
                      
                      • You may want to append export PATH=$HOME/<path-to-build-dir/bin:$PATH to your ~/.bashrc
                        echo $PATH to verify toolchain path.

                      Building Google’s Protobuf library :

                      • Clone protobuf
                        mkdir $HOME/Android/NDK/google
                       
                        cd $HOME/Android/NDK/google
                      
                        git clone https://github.com/protocolbuffers/protobuf.git
                      
                        cd protobuf
                      
                        git submodule update --init --recursive
                      
                      # Checkout if specific version is needed, example as shown below, else ignore the below command 
                       git checkout -b v3.5.2 v3.5.2
                      
                      
                      • Build a native (x86) version of the protobuf libraries and compiler (protoc)
                        sudo apt-get install curl autoconf libtool build-essential g++

                      In protobuf folder

                      ./autogen.sh
                      
                       mkdir x86_build
                       cd x86_build
                      
                      # x86_pb_install folder should be created manually at below given path then run the below cmd
                      
                       ../configure --prefix=$HOME/Android/NDK/google/x86_pb_install 
                      
                       make install –j4
                      
                       cd ..
                      

                      Libraries will been installed in: $HOME/Android/NDK/google/x86_pb_install/lib
                      protoc will be in: $HOME/Android/NDK/google/x86_pb_install/bin
                      include files will be in: $HOME/Android/NDK/google/x86_pb_install/include

                      • Build the arm64 version of the protobuf libraries:
                       mkdir arm64_build
                      
                       cd arm64_build
                      
                       # arm64_pb_install folder should be created manually at below given path then run the below cmd
                      
                        CC=aarch64-linux-android-clang \
                        CXX=aarch64-linux-android-clang++ \
                        CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" \
                           ../configure --host=aarch64-linux-android \
                           --prefix=$HOME/Android/NDK/google/arm64_pb_install \
                           --with-protoc=$HOME/Android/NDK/google/x86_pb_install/bin/protoc
                      
                        make install –j4
                      
                        cd ..
                      
                      

                      Libraries will been installed in: $HOME/Android/NDK/google/arm64_pb_install/lib
                      protoc will be in: $HOME/Android/NDK/google/arm64_pb_install/bin
                      include files will be in: $HOME/Android/NDK/google/arm64_pb_install/include

                      • Compiling Your Protocol Buffers
                        protoc -I=$SRC_DIR --cpp_out=$DST_DIR $SRC_DIR/file_name.proto

                      @SGaist
                      Hope this helps

                      @Chapay, @Clem3nt
                      If possible please try this and update me.

                      mbruelM Offline
                      mbruelM Offline
                      mbruel
                      wrote on last edited by
                      #21

                      @Pradeep-P-N

                      Thanks for this.
                      It's working fine.
                      Little remark from Nov 2020, the script make_standalone_toolchain.py is no longer needed:

                      #$ $NDK/build/tools/make_standalone_toolchain.py --arch arm64 --api 28 --stl=libc++ --install-dir=/home/bruel/apps/protobuf/build
                      #WARNING:__main__:make_standalone_toolchain.py is no longer necessary. The
                      #$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin directory contains target-specific scripts that perform
                      #the same task. For example, instead of:
                      #
                      #    $ python $NDK/build/tools/make_standalone_toolchain.py \
                      #        --arch arm64 --api 28 --install-dir toolchain
                      #    $ toolchain/bin/clang++ src.cpp
                      #
                      #Instead use:
                      #
                      #    $ $NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android28-clang++ src.cpp
                      

                      So for arm64, you can go directly like this
                      CC=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang CXX=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang++ CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" ../configure --host=aarch64-linux-android --prefix=$APPS_DIR/protobuf/release/arm64 --with-protoc=~/apps/protobuf/release/x86_64/bin/protoc

                      For those interested, here is my script to build on Linux for x86_64, arm64 and armv7a.

                      Pradeep P NP 1 Reply Last reply
                      1
                      • mbruelM mbruel

                        @Pradeep-P-N

                        Thanks for this.
                        It's working fine.
                        Little remark from Nov 2020, the script make_standalone_toolchain.py is no longer needed:

                        #$ $NDK/build/tools/make_standalone_toolchain.py --arch arm64 --api 28 --stl=libc++ --install-dir=/home/bruel/apps/protobuf/build
                        #WARNING:__main__:make_standalone_toolchain.py is no longer necessary. The
                        #$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin directory contains target-specific scripts that perform
                        #the same task. For example, instead of:
                        #
                        #    $ python $NDK/build/tools/make_standalone_toolchain.py \
                        #        --arch arm64 --api 28 --install-dir toolchain
                        #    $ toolchain/bin/clang++ src.cpp
                        #
                        #Instead use:
                        #
                        #    $ $NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android28-clang++ src.cpp
                        

                        So for arm64, you can go directly like this
                        CC=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang CXX=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang++ CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" ../configure --host=aarch64-linux-android --prefix=$APPS_DIR/protobuf/release/arm64 --with-protoc=~/apps/protobuf/release/x86_64/bin/protoc

                        For those interested, here is my script to build on Linux for x86_64, arm64 and armv7a.

                        Pradeep P NP Offline
                        Pradeep P NP Offline
                        Pradeep P N
                        wrote on last edited by
                        #22

                        Hi @mbruel

                        That's cool,
                        I had a critical time & had to go with make_standalone_toolchain.py at that time.

                        Thanks for the updated script on this Building protobuff libs for Android 64 bit (ARM64-v8a) Qt 5.12.4.

                        Pradeep Nimbalkar.
                        Upvote the answer(s) that helped you to solve the issue...
                        Keep code clean.

                        1 Reply Last reply
                        0
                        • mbruelM Offline
                          mbruelM Offline
                          mbruel
                          wrote on last edited by
                          #23

                          In fact with the method I've posted just above, I can build the Android arm64 library but when I deploy it to a device it's crashing with this:

                          E AndroidRuntime: FATAL EXCEPTION: qtMainLoopThread
                          E AndroidRuntime: Process: fr.mbruel.ClementineRemote, PID: 24487
                          E AndroidRuntime: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "_Unwind_Resume" referenced by "/data/app/fr.mbruel.ClementineRemote-eCT926MVQi5HkO3nFNVzEg==/lib/arm64/libprotobuf.so"...
                          E AndroidRuntime: 	at java.lang.Runtime.load0(Runtime.java:938)
                          E AndroidRuntime: 	at java.lang.System.load(System.java:1631)
                          E AndroidRuntime: 	at org.qtproject.qt5.android.QtNative$3.run(QtNative.java:348)
                          E AndroidRuntime: 	at org.qtproject.qt5.android.QtThread$2.run(QtThread.java:87)
                          E AndroidRuntime: 	at org.qtproject.qt5.android.QtThread$1.run(QtThread.java:61)
                          E AndroidRuntime: 	at java.lang.Thread.run(Thread.java:919)
                          

                          Any idea why?
                          I'm using protobuf 3.13. I've tried the latest 3.17 but I've the same issue...
                          I'm building using this command:

                          NDK=~/android/android-ndk-r21
                          ANDROID_API=29
                          
                          CC=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang CXX=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android$ANDROID_API-clang++ CFLAGS="-fPIE -fPIC" LDFLAGS="-pie -llog" ../configure --host=aarch64-linux-android --prefix=~/apps/protobuf/release/arm64 --with-protoc=~/apps/protobuf/release/x86_64/bin/protoc
                          
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                          • mbruelM Offline
                            mbruelM Offline
                            mbruel
                            wrote on last edited by
                            #24

                            @mbruel said in Building protobuff libs for Android 64 bit (ARM64-v8a) Qt 5.12.4:

                            cannot locate symbol "_Unwind_Resume"

                            I've updated the NDK to the r21e and the crash is gone! \o/

                            1 Reply Last reply
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