Android NDK ignores error:undefined reference to ' can't find symbol

Recently in the angel's wing of the MRP simulator ...

Moved to Androidstudio and now want to put the original Android

. Mk the way it's changed to CMake is compiled, but there are some symbols that are not found at compile time.

Undefined reference, these are actually in a file called mr_gc, but there is no such file. So decided to ignore the missing symbols, but the search was android.mk

Finally found in this blog

74509894

By setting this parameter

Android_allow_undefined_symbols

This is set in the Build.gradle,

Attached Build.gradle

Apply plugin: ' Com.android.library '

Android {
Compilesdkversion 27
Buildtoolsversion "27.0.1"

Defaultconfig {
Minsdkversion 17
Targetsdkversion 17

ndk{
Abifilters "Armeabi"

}
Externalnativebuild {
CMake {
Cppflags ""
Arguments "-dandroid_allow_undefined_symbols=true"
}
}
}

Buildtypes {
Release {
Minifyenabled false
Proguardfiles getdefaultproguardfile (' proguard-android.txt '), ' proguard-rules.txt '
}
Debug {
Jnidebuggable true

}
sourcesets {
Main {
Jnilibs.srcdir ' Src/main/libs '
Jni.srcdirs = []
}
}

}



Externalnativebuild {
CMake {
Path "CMakeLists.txt"
}
}
}

dependencies {
Compile ' com.android.support:support-v4:23.+ '
}

Android NDK ignores error:undefined reference to ' can't find symbol