迁移构建以使用cmake

Question

我从gradle-experimental迁移项目：0.8.3到gradle：2.3.3。 除此之外，我还需要开始使用新的cmake，这证明不是那么直接。 实验性gradle插件的片段有效：

repositories {
    libs(PrebuiltLibraries) {
        // Configure one pre-built lib: shared
        crypto {
            // Inform Android Studio where header file dir for this lib
            headers.srcDir "${lib_distribution_root}/openssl/includes"
            // Inform Android Studio where lib is -- each ABI should have a lib file
            binaries.withType(SharedLibraryBinary) {
                sharedLibraryFile = file("${lib_distribution_root}/openssl/lib/armeabi/libcrypto.so")
            }
        }

        openssl {
            // Inform Android Studio where header file dir for this lib
            headers.srcDir "${lib_distribution_root}/openssl/includes"
            // Inform Android Studio where lib is -- each ABI should have a lib file
            binaries.withType(SharedLibraryBinary) {
                sharedLibraryFile = file("${lib_distribution_root}/openssl/lib/armeabi/libssl.so")
            }
        }

        pjsip {
            // Inform Android Studio where header file dir for this lib
            headers.srcDir "${lib_distribution_root}/pjsip/includes"
            // Inform Android Studio where lib is -- each ABI should have a lib file
            binaries.withType(SharedLibraryBinary) {
                sharedLibraryFile = file("${lib_distribution_root}/pjsip/lib/armeabi/libpjsua.so")
            }
        }
    }
}

android {
    def globalConfiguration = rootProject.ext

    compileSdkVersion = globalConfiguration.androidCompileSdkVersion
    buildToolsVersion = globalConfiguration.androidBuildToolsVersion

    defaultConfig.with {
        minSdkVersion.apiLevel = globalConfiguration.androidMinSdkVersion
        targetSdkVersion.apiLevel = globalConfiguration.androidTargetSdkVersion
        multiDexEnabled = true
        testInstrumentationRunner = "android.support.test.runner.AndroidJUnitRunner"
    }

    dexOptions.with {
        javaMaxHeapSize = "4g"
    }

    lintOptions.with {
        abortOnError = false
    }

    sources {
        main {
            jni {
                dependencies {
                    library 'crypto' linkage 'shared'
                    library 'openssl' linkage 'shared'
                    library 'pjsip' linkage 'shared'
                }
            }
            jniLibs {
                // for shared lib, lib need to be pushed to the target too
                // Once libs are copied into app/src/main/jniLibs directory,
                // Android Studio will pack them into APK's lib/ directory
                // Here we like to avoid another duplication by pointing
                // to the files that containing our libs' distribution location
                // so the same file is used by compiler at host, also packed
                // into APk to be used at Target (phone/tablet)
                source {
                    srcDir "${lib_distribution_root}/openssl/lib/armeabi"
                    srcDir "${lib_distribution_root}/pjsip/lib/armeabi"
                }
            }
        }
    }

    ndk {
        moduleName = "datanative"
        platformVersion = 19
        stl = "gnustl_static"
        ldLibs.addAll("android", "stdc++", "log", "GLESv2", "EGL", "OpenSLES", "z", "m")
        cppFlags.addAll("-std=c++11", "-frtti", "-fexceptions", "-pthread", "-fpic", "-ffunction-sections", "-funwind-tables")
        cppFlags.add("-DPJ_AUTOCONF")

        abiFilters.add(abiName)
        cppFlags.add("-marm")
    }
}

}

当前正在进行的工作有gradle配置：

android {
def globalConfiguration = rootProject.ext

compileSdkVersion globalConfiguration.androidCompileSdkVersion
buildToolsVersion globalConfiguration.androidBuildToolsVersion

defaultConfig {
    minSdkVersion globalConfiguration.androidMinSdkVersion
    targetSdkVersion globalConfiguration.androidTargetSdkVersion
    multiDexEnabled true
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

    externalNativeBuild {

        cmake {
            cppFlags "-std=c++11", "-DPJ_AUTOCONF", "-fpic", "-frtti", "-fexceptions", "-pthread", "-ffunction-sections", "-funwind-tables", "-marm"
            arguments '-DANDROID_PLATFORM=android-21', '-DANDROID_STL=gnustl_static'
        }
    }

    ndk {
        moduleName "datanative"
        abiFilters 'armeabi'
    }

}

externalNativeBuild {
    cmake {
        path 'CMakeLists.txt'
    }
}

sourceSets {
    main {
        jniLibs.srcDirs '../distribution/pjsip/lib/armeabi/', '../distribution/openssl/lib/armeabi/', 'src/main/cpp/'
    }
}

dexOptions.with {
    javaMaxHeapSize = "4g"
}

lintOptions.with {
    abortOnError = false
}

}

和CMakeLists：

cmake_minimum_required(VERSION 3.4.1)

file(GLOB SOURCES
    src/main/cpp/*.h
    src/main/cpp/*.cpp
)

set(distribution_DIR ${path})

include_directories(src/main/cpp/)
include_directories(../distribution/openssl/includes/)
include_directories(../distribution/pjsip/includes/)

add_library( crypto  SHARED IMPORTED )
set_target_properties(crypto PROPERTIES IMPORTED_LOCATION
                       # Provides the path to the library you want to import.
                       absolute_path_cause_gradle_has_error_otherwise/distribution/openssl/lib/armeabi/libcrypto.so )

add_library( ssl  SHARED IMPORTED )
set_target_properties(ssl PROPERTIES IMPORTED_LOCATION
                       # Provides the path to the library you want to import.
                       absolute_path_cause_gradle_has_error_otherwise/distribution/openssl/lib/armeabi/libssl.so )

add_library( pjsip  SHARED IMPORTED )
set_target_properties(pjsip PROPERTIES IMPORTED_LOCATION
                       # Provides the path to the library you want to import.
                       absolute_path_cause_gradle_has_error_otherwise/distribution/pjsip/lib/armeabi/libpjsua.so )

add_library( data SHARED ${SOURCES} )

target_link_libraries(data crypto ssl pjsip)

我面临的链接错误，可能不是根本原因：

/src/main/cpp/sthread.cpp

Error:(73) undefined reference to '__emutls_v._ZN6STrace12pLocalStreamE'

Error:(73) undefined reference to '__emutls_v._ZN6STrace12pLocalStreamE'

/Library/Android/sdk/ndk-bundle/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/basic_string.h

Error:(547) undefined reference to '__emutls_v._ZN6STrace12pLocalStreamE'

Error:(547) undefined reference to '__emutls_v._ZN6STrace12pLocalStreamE'

任何线索都会被贬低。 谢谢！