OpenSSL JNI FAILURE：构建失败，异常

Question

我正在尝试构建JNI项目并使用openssl进行加密和解密。我得到了以下错误。这是什么意思？我们什么时候得到这样的错误？以及如何解决它？

失败：构建因异常而失败。

• 出了什么问题： 任务＆＃39;：app：externalNativeBuildDebug＆＃39;执行失败。

    

  构建命令失败。   执行进程C：\ android \ sdk \ cmake \ 3.6.4111459 \ bin \ cmake.exe时出错{--build C：\ SampleJni \ app.externalNativeBuild \ cmake \ debug \ armeabi-v7a --target native-lib }   [1/2]构建CXX对象CMakeFiles / native-lib.dir / src / main / cpp / native-lib.cpp.o   [2/2]链接CXX共享库........ \ build \ intermediates \ cmake \ debug \ obj \ armeabi-v7a \ libnative-lib.so   失败：cmd.exe / C＆＃34; cd。 ＆安培;＆安培; C：\ android \ sdk \ ndk-bundle \ toolchains \ llvm \ prebuilt \ windows-x86_64 \ bin \ clang ++。exe --target = armv7-none-linux-androideabi --gcc-toolchain = C：/ android / sdk / ndk-bundle / toolchains / arm-linux-androideabi-4.9 / prebuilt / windows-x86_64 --sysroot = C：/ android / sdk / ndk-bundle / sysroot -fPIC -isystem C：/ 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 C：/ android / sdk / ndk-bundle / platforms / android-14 / arch-arm -Wl， - build-id -Wl， - warn-shared-textrel -Wl， - 致命警告-Wl， - fix-cortex-a8 -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 \ armeabi-v7a \ libnative-lib.so CMa keFiles / native-lib.dir / src / main / cpp / native-lib.cpp.o ../../../../openssl-armeabi-v7a/lib/libcrypto.a ../../ ../../openssl-armeabi-v7a/lib/libssl.a -llog -lm＆＃34; C：/ android / sdk / ndk-bundle / sources / cxx-stl / gnu-libstdc ++ / 4.9 / libs / armeabi-V7A / libgnustl_static.a＆＃34; ＆安培;＆安培; cd。＆＃34;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(ui_openssl.o):ui_openssl.c:function read_string_inner：error：undefined reference to＆＃39; signal＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(ui_openssl.o):ui_openssl.c:function read_string_inner：error：undefined reference to＆＃39; tcsetattr＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(ui_openssl.o):ui_openssl.c:function read_string_inner：error：undefined reference to＆＃39; tcsetattr＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(ui_openssl.o):ui_openssl.c:function open_console：error：undefined reference to＆＃39; tcgetattr＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_expand_block：error：undefined reference to＆＃39; inflate＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_compress_block：error：undefined reference to＆＃39; deflate＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_free：错误：未定义引用＆＃39; inflateEnd＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_free：错误：未定义引用＆＃39; deflateEnd＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_finish：error：undefined reference to＆＃39; inflateEnd＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_finish：error：undefined reference to＆＃39; deflateEnd＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_init：error：undefined reference to＆＃39; inflateInit _＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function zlib_stateful_init：error：undefined reference to＆＃39; deflateInit _＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_ctrl：error：undefined reference to＆＃39; deflate＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_ctrl：error：undefined reference to＆＃39; zError＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_write：error：undefined reference to＆＃39; deflate＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_write：error：undefined reference to＆＃39; zError＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_write：error：undefined reference to＆＃39; deflateInit _＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_read：错误：未定义引用＆＃39;膨胀＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_read：error：undefined reference to＆＃39; zError＆＃39;   ../../../../openssl-armeabi-v7a/lib/libcrypto.a(c_zlib.o):c_zlib.c:function bio_zlib_read：错误：未定义引用＆＃39; inflateInit _＆＃39;   clang ++。exe：错误：链接器命令失败，退出代码为1（使用-v查看调用）   忍者：构建停止：子命令失败。

在下面分享应用的build.gradle

defaultConfig {
    applicationId "com.example.openssl"
    minSdkVersion 14
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    externalNativeBuild {
        cmake {
            cppFlags ""
        }
    }
    ndk {
        abiFilters 'armeabi-v7a'
    }
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
externalNativeBuild {
    cmake {
        path "CMakeLists.txt"
    }
}

文件夹结构：