[grpc-io] how to cross compile grpc Server

[Simon Chamlian]

Hi,

Is there any instruction on how to cross compile grpc server to port it on an embedded Linux system?

Thanks,

S

[yas...@google.com]

I don't think we have instructions for this. It would be a good idea to file an issue on github for this.

[Simon Chamlian]

I am surprised that no one has a grpc server on an embedded system.

What is /usr/bin/grpc_cpp_plugin  used for?

--
You received this message because you are subscribed to the Google Groups "grpc.io" group.
To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+u...@googlegroups.com.
To post to this group, send email to grp...@googlegroups.com.
Visit this group at https://groups.google.com/group/grpc-io.
To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/7e18a603-1038-483f-a814-4c145047cb79%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[yas...@google.com]

It's not that no one uses it that way. It's just that we don't have a doc for it at the moment. Creating a github issue for this should help keep track. We do want to improve our documentation :) 

In the mean time, unless someone has a better answer, I would suggest looking at the Makefile to check which configurations you need to modify.

grpc_cpp_plugin is a protobuf plugin for generating gRPC code.

[Simon Chamlian]

I am trying to port the example into an Eclipse environment to cross compile.

Which libraries do I need to include and their path  (`pkg-config --libs protobuf grpc++ grpc`)?

Thanks,

S

To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/07ecb1f4-98fe-4f18-b7d0-6a08cc3b1cb4%40googlegroups.com.

[Stephan Menzel]

I have it running on Raspberry Pi with no problems. If that counts as embedded. Since grpc's build system is so complicated I suppose the easiest way would be to either use supplied packages or compile it on the target system itself.

Cheers,

Stephan

[Simon Chamlian]

Is there binary versions available for different platforms (CPUs)?

--

You received this message because you are subscribed to the Google Groups "grpc.io" group.
To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+u...@googlegroups.com.
To post to this group, send email to grp...@googlegroups.com.
Visit this group at https://groups.google.com/group/grpc-io.

To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/d61afcc0-1b8b-4c5d-90ec-fcb3af03b65e%40googlegroups.com.

[Stephan Menzel]

Am Freitag, 12. Oktober 2018 15:33:46 UTC+2 schrieb SimonC:

Is there binary versions available for different platforms (CPUs)?

Sure. Raspbian at the very least has grpc and protobuf packages. You may need to include extra repos though.

Look for libgrpc-dev.

> apt search libgrpc-dev 

HTH,

Stephan

[Simon Chamlian]

Still having lots of issues to cross compile.

Is it a good strategy to give up on libraries and instead compile the source code? 

If so, does anyone knows which source code is required to be able to cross-compile the greeter_server example?

~/grpc/src/cpp$ ls -l
total 32
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 client
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 codegen
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 common
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 ext
-rwxrwxr-x 1 jay jay 1170 Aug 24 15:04 README.md
drwxrwxr-x 3 jay jay 4096 Oct 23 10:59 server
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 thread_manager
drwxrwxr-x 2 jay jay 4096 Aug 24 15:04 util

 

Is it source code in ~/grpc/src/cpp/server  directory and ~/grpc/src/cpp/common directory I need to include?

Tx,

S.

--

You received this message because you are subscribed to the Google Groups "grpc.io" group.
To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+u...@googlegroups.com.
To post to this group, send email to grp...@googlegroups.com.
Visit this group at https://groups.google.com/group/grpc-io.

To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/d1d65d9c-113a-4486-981d-5a6dbb5f870c%40googlegroups.com.

[Simon Chamlian]

I did a cross compilation a grpc within YOCTO and ended up with the following libraries:

libgrpc.a   

libgrpc_cronet.a   

libgrpc++_error_details.a 

libgrpc++_reflection.a 

libgrpc++_unsecure.a 

libprotobuf-c.a
libgrpc++.a 

libgrpc++_cronet.a 

libgrpc_plugin_support.a  

libgrpc_unsecure.a     

libprotobuf.a        

libprotobuf-lite.a

When I compile the greeter_server within Eclipse, I get lots of errors of classes not recognized. I presume these classes are defined in libraries.

Does anyone know which libraries do I need to include in Eclipse project?

Thanks,

S

[Simon Chamlian]

for example, one of the errors is:

/home/jay/works_Versa_imx7/xgrpc_server/src/libgrpc.a(httpcli.cc.o): In function `append_error':

/usr/src/debug/grpc/1.8.5-r0/git/src/core/lib/http/httpcli.cc:124: undefined reference to `gpr_free'

So inside libgrpc.a(httpcli.cc.o) the function append_error is calling gpr_free.

I guess I am missing some libraries.

[Simon Chamlian]

This is the makefile generated  by eclipse:

USER_OBJS := /home/jay/works_Versa_imx7/xgrpc_server/src/libprotobuf.a /home/jay/works_Versa_imx7/xgrpc_server/src/libgrpc++.a /home/jay/works_Versa_imx7/xgrpc_server/src/libgrpc.a /home/jay/works_Versa_imx7/xgrpc_server/src/libgrpc++_reflection.a

LIBS := -lpthread -lm -ldl

@echo 'Invoking: GCC C++ Linker'
arm-poky-linux-gnueabi-g++  -march=armv7ve -mfpu=neon  -mfloat-abi=hard -mcpu=cortex-a7 --sysroot=/opt/fsl-imx-x11/4.9.11-1.0.0/sysroots/cortexa7hf-neon-poky-linux-gnueabi  -O2 -pipe -g -feliminate-unused-debug-types  -o "xgrpc_server" $(OBJS) $(USER_OBJS) $(LIBS)

[robert engels]

I think you may just be linking incorrectly, that method is part of the grpc core https://grpc.io/grpc/core/alloc_8h.html

To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/CANmTPBYN__MkReUKXtuPqdVUQrB6pKn%2B9mOhJA0J6TTQYD5a0g%40mail.gmail.com.

[robert engels]

I think you may just be linking incorrectly, that method is part of the grpc core https://grpc.io/grpc/core/alloc_8h.html

On Oct 24, 2018, at 3:01 PM, Simon Chamlian <simon.c...@mpbc.ca> wrote:

To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/CANmTPBYN__MkReUKXtuPqdVUQrB6pKn%2B9mOhJA0J6TTQYD5a0g%40mail.gmail.com.

[Simon Chamlian]

yes my problem is at linking phase of cross-compiling. That is why I was wondering which libraries I should include.

The Makefile on the host (PC)  where it compiles correctly, I see:

g++ -std=c++11 `pkg-config --cflags protobuf grpc`  -c -o greeter_server.o greeter_server.cc
g++ helloworld.pb.o helloworld.grpc.pb.o greeter_server.o -L/usr/local/lib `pkg-config --libs protobuf grpc++ grpc` -Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed -ldl -o greeter_server

what does the `pkg-config --libs protobuf grpc++ grpc` instruction do?

I am including the following libraries:

libprotobuf.a

libgrpc++.a

libgrpc.a

libgrpc++_reflection.a