libcrypto.so: error adding symbols: File in wrong format clang++: error: linker command failed with exit code 1

Question

I am trying to build boringssl for Android's armeabi-v7a. I looked at the boringssl git document and built it.

//termanal
cmake -DANDROID_ABI=armeabi-v7a \
-DANDROID_PLATFORM=android-21 \
-DCMAKE_TOOLCHAIN_FILE=${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake \
-DBUILD_SHARED_LIBS=1 \
-GNinja -B build

ninja -C build 

When you run the above command in the terminal, the boringssl/build directory is created and .so and build files are created inside the directory.

I put libcrypto.so, libssl.so in app/opensslSO/libs in android project. Header files are placed in app/opensslSO/include.

I wrote CMakeLists.txt for library linking.

cmake_minimum_required(VERSION 3.18.1)


# OpenSSL 라이브러리 경로 설정
set(OPENSSL_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/opensslSO/include")
set(OPENSSL_LIBRARY_DIR "${CMAKE_SOURCE_DIR}/opensslSO/libs")

include_directories(
    ${OPENSSL_INCLUDE_DIR}
)

add_library(crypto SHARED IMPORTED)
set_target_properties(crypto PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libcrypto.so)

add_library(ssl SHARED IMPORTED)
set_target_properties(ssl PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libssl.so)

add_library(pki SHARED IMPORTED)
set_target_properties(pki PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libpki.so)

add_library(decrepit SHARED IMPORTED)
set_target_properties(decrepit PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libdecrepit.so)


add_library( score_printer

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             my_native_file_path
             )


target_link_libraries( native_lib
                       crypto
                       ssl
                       pki
                       decrepit
                       android
                       log
                       EGL
                       GLESv1_CM
                      )

I thought it would work fine, but I get an error.

/opensslSO/libs/libcrypto.so: error adding symbols: File in wrong format
  clang++: error: linker command failed with exit code 1 (use -v to see invocation)
  ninja: build stopped: subcommand failed.

Answer 1

Solved :

This can be solved by building ABI for not only armeabi-v7a, but also arm64-v8a, x86 and x86_64 and setting the directories separately.

set(OPENSSL_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/opensslSO/include")
set(OPENSSL_LIBRARY_DIR "${CMAKE_SOURCE_DIR}/opensslSO/libs/${ANDROID_ABI}")

include_directories(
    ${OPENSSL_INCLUDE_DIR}
)

add_library(crypto SHARED IMPORTED)
set_target_properties(crypto PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libcrypto.so)


add_library(ssl SHARED IMPORTED)
set_target_properties(ssl PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libssl.so)

add_library(pki SHARED IMPORTED)
set_target_properties(pki PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libpki.so)

add_library(decrepit SHARED IMPORTED)
set_target_properties(decrepit PROPERTIES IMPORTED_LOCATION ${OPENSSL_LIBRARY_DIR}/libdecrepit.so)


target_link_libraries( 
                       crypto
                       ssl
                       pki
                       decrepit
                       android
                       log
                       EGL
                       GLESv1_CM
                      )