> Invalid NativePlatform: linux_aarch64

[alexryan]

I am trying to build on an arm 64 bit platform.
Following these instructions .

I have successfully built grpc-java
but only by adding skipCodegen=true to gradle.properties.

I have succesfully build protobuf on the platform as well
by following the instructions on the same page.

however, after building protobuf, when I go back I try to build grpc-java without the gradle properties file, I get this error ...

ubuntu@tegra-ubuntu:~/grpc-java3/grpc-java$ ./gradlew build
*** Building codegen requires Protobuf version 3.0.0
*** Please refer to https://github.com/grpc/grpc-java/blob/master/COMPILING.md#how-to-build-code-generation-plugin

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':grpc-compiler'.
> Exception thrown while executing model rule: NativeComponentModelPlugin.Rules#createBinaries(TargetedNativeComponentInternal, PlatformResolvers, BuildTypeContainer, FlavorContainer, ServiceRegistry)
   > Invalid NativePlatform: linux_aarch64

It appears that this code generation plugin is a necessary component to tensorflow.
I need to get tensorflow installed on this machine [nvidia jetson tk1], so I need to find a way to build this plugin.
Any suggestions?

ubuntu@tegra-ubuntu:~/grpc-java3/grpc-java$ java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

ubuntu@tegra-ubuntu:~/grpc-java3/grpc-java$ uname -a
Linux tegra-ubuntu 3.10.96-tegra #1 SMP PREEMPT Tue May 17 16:29:05 PDT 2016 aarch64 aarch64 aarch64 GNU/Linux

ubuntu@tegra-ubuntu:~/grpc-java3/grpc-java$ lsb_release -d
Description:    Ubuntu 14.04.5 LTS
ubuntu@tegra-ubuntu:~/grpc-java3/grpc-java$ 

the hardware is
nvidia jetson tk1 dev kit.
this has a GPU
but the CPU is one of these ...
NVIDIA 4-Plus-1™ Quad-Core ARM® Cortex™-A15 CPU

[ejona86]

Take a look at this thread on grpc-io mailing list (which references another thread).

[ghost]

It's not at all clear from that thread what to add to the config. As far as I can tell, gradle currently doesn't support e.g. arm-v7. Given that Bazel is now available, and it can (in earlier versions, pre 0.3.x) be bootstrapped on arm-v7 fairly easily, why not use Bazel to build grpc as well? Because of this issue it is currently not possible to build Bazel 0.3.x -- it wants GRPC Java, and GRPC Java can't be built on arm-v7. Checkmate.

[ejona86]

I got this working on my odroid-c2 (aarch64):

diff --git a/compiler/build.gradle b/compiler/build.gradle
index c0ffd4a..ff7c87d 100644
--- a/compiler/build.gradle
+++ b/compiler/build.gradle
@@ -47,6 +47,7 @@ model {
       }
     }
     gcc(Gcc) {
+      target("unknown")
     }
     clang(Clang) {
     }
@@ -59,6 +60,7 @@ model {
     x86_64 {
       architecture "x86_64"
     }
+    unknown {}
   }

   components {
@@ -67,6 +69,8 @@ model {
         // If arch is not within the defined platforms, we do not specify the
         // targetPlatform so that Gradle will choose what is appropriate.
         targetPlatform arch
+      } else {
+        targetPlatform "unknown"
       }
       baseName "$protocPluginBaseName"
     }

I also stumbled upon @alexryan's gradle thread that also has a solution. I'd like to tweak my solution slightly so that it is obvious the arch variable was ignored before sending out a PR.

[ejona86]

Also note: ./gradlew build is a bit more annoying now-a-days for arm because it can't locate protoc-gen-javalite. You can do ./gradlew assemble to avoid the tests and that dependency. Otherwise you'd need to build the javalite protobuf branch. I did do that when I was testing, so I know it works, but it adds yet another step.

[alexryan]

This solution works as well ...
https://www.neotitans.net/install-tensorflow-on-odroid-c2.html

[ejona86]

@alexryan, where is the grpc-java.v0.15.0.patch referenced in that guide?

[alexryan]

https://github.com/neo-titans/odroid/tree/master/build_tensorflow

[xzy256]

@alexryan @ejona86 @Variac When i build grpc-java for mips64el, i get error. part of outputs as follow.

10:43:58.176 [INFO] [com.google.gradle.osdetector.OsDetector] ------------------------------------------------------------------------
10:43:58.179 [INFO] [com.google.gradle.osdetector.OsDetector] Detecting the operating system and CPU architecture
10:43:58.180 [INFO] [com.google.gradle.osdetector.OsDetector] ------------------------------------------------------------------------
10:43:58.181 [INFO] [com.google.gradle.osdetector.OsDetector] os.detected.name=linux
10:43:58.182 [INFO] [com.google.gradle.osdetector.OsDetector] os.detected.arch=unknown
10:43:58.184 [DEBUG] [org.gradle.configuration.project.BuildScriptProcessor] Timing: Running the build script took 0.487 secs
10:43:58.188 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
10:43:58.189 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] FAILURE: Build failed with an exception.
10:43:58.189 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
10:43:58.190 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Where:
10:43:58.190 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Build file '/home/xzy/grpc-java/build.gradle' line: 85
10:43:58.190 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
10:43:58.191 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * What went wrong:
10:43:58.191 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] A problem occurred evaluating root project 'grpc'.
10:43:58.192 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] > unknown os.arch: mips64el
10:43:58.192 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] 
10:43:58.193 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] * Try:
10:43:58.193 [ERROR] [org.gradle.internal.buildevents.BuildExceptionReporter] Run with --stacktrace option to get the stack trace. 
10:43:58.194 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] 
10:43:58.194 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] BUILD FAILED
10:43:58.195 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] 
10:43:58.195 [LIFECYCLE] [org.gradle.internal.buildevents.BuildResultLogger] Total time: 4.834 secs

our environment:

arch :mips64el
protocbuf:3.2.0(build github source by myself)
java:openJDK1.8.0_25

'/home/xzy/grpc-java/build.gradle' 85 rows

 84     ext {
 85         def exeSuffix = osdetector.os == 'windows' ? ".exe" : ""

osdetector.os occur the error, should i build osdetector-java-plugin? could you give me any ideas?

[xzy256]

I have solved my build error. Build os-maven-plugin for mips64 arch support, then osdetector.os and osdetector.name can be recognized. Building os-maven-plugin for mips64 infers os-maven-plugin-mips64.patch

[ejona86]

Bazel build support was just added in #2975. I'd be interested if that makes life easier here. Yes, we still don't have official binaries for ARM, but Bazel users might not care any more.

[ejona86]

This was fixed by #6441