Android:链接到预建的静态库

Question

我已经为 Android 编译了一些静态库和共享库。具体来说，我有图书馆

libcoinblas.a   libcoinlapack.a   libcoinmetis.a   libcoinmumps.a   libipopt.a
libcoinblas.so  libcoinlapack.so  libcoinmetis.so  libcoinmumps.so  libipopt.so

此外，这些库是相互依赖的，也就是说，

Lapack requires Blas
Mumps  requires Blas and Metis
Ipopt  requires Mumps, Metis, and Lapack

Android 项目在使用共享库时正确链接和运行，但无法使用静态库构建。

在共享案例中，我使用的是cmake文件

cmake_minimum_required(VERSION 3.4.1)

add_library( native-lib
             SHARED
             src/main/cpp/cpp_example.cpp
             src/main/cpp/MyNLP.cpp)

# Add dependent libraries
add_library(blas SHARED IMPORTED)
set_property(TARGET blas PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinblas.so)

add_library(lapack SHARED IMPORTED)
set_property(TARGET lapack PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinlapack.so)

add_library(metis SHARED IMPORTED)
set_property(TARGET metis PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinmetis.so)

add_library(mumps SHARED IMPORTED)
set_property(TARGET mumps PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinmumps.so)

add_library(ipopt SHARED IMPORTED)
set_property(TARGET ipopt PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libipopt.so)

# Location of header files
include_directories(${CMAKE_SOURCE_DIR}/libs/include
                    ${CMAKE_SOURCE_DIR}/libs/include/ThirdParty)

target_link_libraries( native-lib

                       blas
                       lapack
                       metis
                       mumps
                       ipopt
                       )

在静态情况下

cmake_minimum_required(VERSION 3.4.1)

add_library( native-lib
             SHARED
             src/main/cpp/cpp_example.cpp
             src/main/cpp/MyNLP.cpp)

# Add dependent libraries
add_library(blas STATIC IMPORTED)
set_property(TARGET blas PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinblas.a)

add_library(lapack STATIC IMPORTED)
set_property(TARGET lapack PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinlapack.a)

add_library(metis STATIC IMPORTED)
set_property(TARGET metis PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinmetis.a)

add_library(mumps STATIC IMPORTED)
set_property(TARGET mumps PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libcoinmumps.a)

add_library(ipopt STATIC IMPORTED)
set_property(TARGET ipopt PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/libs/${ANDROID_ABI}/libipopt.a)

# Location of header files
include_directories(${CMAKE_SOURCE_DIR}/libs/include
                    ${CMAKE_SOURCE_DIR}/libs/include/ThirdParty)

target_link_libraries( native-lib

                       blas
                       lapack
                       metis
                       mumps
                       ipopt
                       )

我假设我只需要更改库的添加方式

add_library(libxxx SHARED IMPORTED)
set_property(TARGET libxxx PROPERTY ... libxxx.so)

到

add_library(libxxx STATIC IMPORTED)
set_property(TARGET libxxx PROPERTY ... libxxx.a)

但这行不通。具体来说，在静态情况下，我得到一堆(数百个)

undefined reference to xxx 

错误。例如，

../../../../libs/arm64-v8a/libipopt.a(IpLapack.o): In function `Ipopt::IpLapackDppsv(int, int, double const*, double*, int, int&)':
IpLapack.cpp:(.text+0x3d4): undefined reference to `dppsv_'

虽然错误不仅仅是由于缺少 Lapack 函数，还有 Mumps 和其他函数。

---

编辑

查看具体的失败命令，我相信库的指定顺序是正确的:

FAILED: cmd.exe /C "cd . && clang++.exe --target=aarch64-none-linux-android --gcc-toolchain=C:/Android/android-sdk/ndk-bundle/toolchains/aarch64-linux-android-4.9/prebuilt/windows-x86_64 --sysroot=sysroot -fPIC -isystem C:/Android/android-sdk/ndk-bundle/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=23 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a --sysroot C:/Android/android-sdk/ndk-bundle/platforms/android-23/arch-arm64 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ........\build\intermediates\cmake\debug\obj\arm64-v8a\libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/cpp_example.cpp.o CMakeFiles/native-lib.dir/src/main/cpp/MyNLP.cpp.o libcoinblas.a libcoinlapack.a libcoinmetis.a libcoinmumps.a libipopt.a -latomic -lm "C:/Android/android-sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/libgnustl_static.a" && cd ."

请注意，我对上面的路径进行了一些清理，以便它们具有一定的可读性，但在最后您可以看到库是按顺序列出的

libcoinblas.a libcoinlapack.a libcoinmetis.a libcoinmumps.a libipopt.a

---

编辑

我还尝试将链接命令从 target_link_library 更改为 link_library:

link_libraries(native-lib blas lapack metis mumps ipopt)

但这也失败了。出于某种原因，在这种情况下，链接命令甚至不包括它应该链接的库:

FAILED: cmd.exe /C "cd . && C:\Android\android-sdk\ndk-bundle\toolchains\llvm\prebuilt\windows-x86_64\bin\clang++.exe --target=aarch64-none-linux-android --gcc-toolchain=C:/Android/android-sdk/ndk-bundle/toolchains/aarch64-linux-android-4.9/prebuilt/windows-x86_64 --sysroot=C:/Android/android-sdk/ndk-bundle/sysroot -fPIC -isystem C:/Android/android-sdk/ndk-bundle/sysroot/usr/include/aarch64-linux-android -D__ANDROID_API__=23 -g -DANDROID -ffunction-sections -funwind-tables -fstack-protector-strong -no-canonical-prefixes -Wa,--noexecstack -Wformat -Werror=format-security -O0 -fno-limit-debug-info -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a --sysroot C:/Android/android-sdk/ndk-bundle/platforms/android-23/arch-arm64 -Wl,--build-id -Wl,--warn-shared-textrel -Wl,--fatal-warnings -Wl,--no-undefined -Wl,-z,noexecstack -Qunused-arguments -Wl,-z,relro -Wl,-z,now -shared -Wl,-soname,libnative-lib.so -o ........\build\intermediates\cmake\debug\obj\arm64-v8a\libnative-lib.so CMakeFiles/native-lib.dir/src/main/cpp/cpp_example.cpp.o CMakeFiles/native-lib.dir/src/main/cpp/MyNLP.cpp.o -latomic -lm "C:/Android/android-sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/libs/arm64-v8a/libgnustl_static.a" && cd ." CMakeFiles/native-lib.dir/src/main/cpp/cpp_example.cpp.o: In function `Java_io_jeti_ipopt_1static_MainActivity_stringFromJNI':

Answer 1

您的库是相互依赖的:

Lapack requires Blas
Mumps  requires Blas and Metis
Ipopt  requires Mumps, Metis, and Lapack

这意味着链接它们的顺序应该是相反的:

ipopt
mumps
metis
lapack
blas 

如果您不想浪费时间找出最佳顺序，而是让链接器找出(这可能是 slow your builds significantly )，您可以使用

target_link_libraries(native-lib -Wl,--start-group blas lapack metis mumps ipopt -Wl,--end-group) .

您还可以通过 IMPORTED_LINK_INTERFACE_LIBRARIES 向 CMake 介绍导入的静态库之间的依赖关系。 ，例如

set_target_properties(lapack 
  PROPERTIES IMPORTED_LINK_INTERFACE_LIBRARIES 
  blas)

等等。

这将翻译

target_link_libraries( native-lib
                   blas
                   lapack
                   )

到

clang++ -o libnative-lib.so … libblas.a libnlapack.a libblas.a