Eventually, I managed to link to the libraries giving explicitely the path
the the third-party library this way:
android.productFlavors {
// for detailed abiFilter descriptions, refer to "Supported ABIs" @
// https://developer.android.com/ndk/guides/abis.html#sa
create("arm7") {
ndk.abiFilters += "armeabi-v7a"
ndk.ldFlags += "-Lsrc/main/jniLibs/armeabi-v7a"
}
}
Is it the expected behaviour with the experimental 0.2.0 build plugin ?
Le vendredi 7 août 2015 18:00:38 UTC+2, Stéphane Saffré a écrit :
>
> Hello,
>
> I am struggling to build a simple native library depending on another
> native third-party shared library (turbojpeg). This native library is
> basically a wrapper of turbojpeg library.
>
> I have followed the documentation I have found here:
> http://tools.android.com/tech-docs/android-ndk-preview
> http://tools.android.com/tech-docs/new-build-system/gradle-experimental
>
> However I am unable to make Android Studio find the third-party library.
> Here is the project setup
>
> Project build.gradle:
>
> // Top-level build file where you can add configuration options common to all
> sub-projects/modules.
> buildscript {
> repositories {
> jcenter()
> }
> dependencies {
> classpath 'com.android.tools.build:gradle-experimental:0.2.0'
> }
> }
>
> allprojects {
> repositories {
> jcenter()
> }
> }
>
>
>
> app module build.gradle:
>
> apply plugin: 'com.android.model.application'
> model {
> android {
> compileSdkVersion = 21
> buildToolsVersion = "22.0.1"
>
> defaultConfig.with {
> applicationId = "com.stephane.turbojpegplugin"
> minSdkVersion.apiLevel = 19
> targetSdkVersion.apiLevel = 19
> }
> }
> /*
> * native build settings
> */
> android.ndk {
> moduleName = "TurboJpegPlugin"
> stl = "stlport_static"
> ldLibs = [ "turbojpeg" ]
> /*
> * Other ndk flags configurable here are
> * cppFlags += "-fno-rtti"
> * cppFlags += "-fno-exceptions"
> * ldLibs = ["android", "log"]
> * stl = "system"
> */
> }
> android.buildTypes {
> release {
> minifyEnabled = false
> proguardFiles += file('proguard-rules.txt')
> }
> }
> android.productFlavors {
> // for detailed abiFilter descriptions, refer to "Supported ABIs" @
> // https://developer.android.com/ndk/guides/abis.html#sa
> create("arm7") {
> ndk.abiFilters += "armeabi-v7a"
> }
> }
> }
>
>
> Gradle builds sucessfully with these files however at project build here
> is the output:
>
> Information:Gradle tasks [clean, :app:compileArm7DebugSources, :app:
> compileArm7DebugAndroidTestSources]
> :app:clean
> :app:copyArmeabi-v7aDebugTurboJpegPluginSharedLibraryGdbServer
> :app:createArmeabi-v7aDebugTurboJpegPluginSharedLibraryGdbsetup
> :app:compileArmeabi-
> v7aDebugTurboJpegPluginSharedLibraryTurboJpegPluginMainCpp
> :app:linkArmeabi-v7aDebugTurboJpegPluginSharedLibrary
> D:\Dev\android-ndk-r10e\toolchains\arm-linux-androideabi-4.9\prebuilt\
> windows-x86_64\arm-linux-androideabi\bin\ld.exe
> Error:error: cannot find -lturbojpeg
> D:\Dev\projects\android\TurboJpegPlugin\app\src\main\jni\TurboJpegPlugin.
> cpp
> Error:(9) undefined reference to 'tjInitDecompress'
> Error:(10) undefined reference to 'tjDecompressHeader2'
> Error:(13) undefined reference to 'tjDecompress2'
> Error:(14) undefined reference to 'tjDestroy'
> Error:error: ld returned 1 exit status
> Error:Execution failed for task
> ':app:linkArmeabi-v7aDebugTurboJpegPluginSharedLibrary'.
> > A build operation failed.
> Linker failed while linking libTurboJpegPlugin.so.
> See the complete log at: file:
> ///D:/Dev/projects/android/TurboJpegPlugin/app/build/tmp/linkArmeabi-v7aDebugTurboJpegPluginSharedLibrary/output.txt
> Information:BUILD FAILED
> Information:Total time: 0.763 secs
> Information:7 errors
> Information:0 warnings
> Information:See complete output in console
>
>
> The turbojpeg library is in the jniLibs folder like this:
>
>
> <https://lh3.googleusercontent.com/-yBTIB9DYN1E/VcTUDr-LKvI/AAAAAAAABb0/SVPc191qycM/s1600/2015-08-07_17h51_24.png>
>
> Following older articles/documentation, the jniLibs folder is where the
> native shared libraries should be put to Android Studio automatically find
> them but it seems it not the case anymore. Did I miss something?
>
> Any help would be greatly appreciated.
>
> Thanks!
>
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