[grpc-io] can't build the example - DEPENDENCY ERROR

[Simon Chamlian]

Hi,

Previously I installed grpc and ran the example on a Ubuntu 16.04 machine.

I followed the instructions given in:

https://grpc.io/docs/quickstart/cpp.html

And it worked like a charm.

Now, I am trying to re-install it on a new machine (again Ubuntu 16.04) without success.

I keep on getting:

jay@Nembuntu:~/grpc/examples/cpp/helloworld$ make
 DEPENDENCY ERROR

You don't have the grpc c++ protobuf plugin installed in your path.
Please install grpc. You can find it here:

   https://github.com/grpc/grpc

Here is what I get when trying to detect if you have the plugin:

which grpc_cpp_plugin
Makefile:104: recipe for target 'system-check' failed
make: [system-check] Error 1 (ignored)


Makefile:104: recipe for target 'system-check' failed
make: *** [system-check] Error 1
jay@Nembuntu:~/grpc/examples/cpp/helloworld$

I checked the previous machine (protoc --version and I get: libprotoc 3.5.0)

The new machine I get: libprotoc 3.6.1

I did all the hints given in;

https://github.com/grpc/grpc/issues/2262

https://github.com/grpc/grpc/issues/13183

https://github.com/grpc/grpc/issues/12422

I tried:

cd third_party/protobuf
./autogen.sh
./configure
make
make check
make install

No luck.

jay@Nembuntu:~/grpc/third_party/protobuf$ make check
Making check in .
make[1]: Entering directory '/home/jay/grpc/third_party/protobuf'
make  check-local
make[2]: Entering directory '/home/jay/grpc/third_party/protobuf'
Making lib/libgmock.a lib/libgmock_main.a in gmock
/bin/sh: line 0: cd: third_party/googletest/googletest: No such file or directory
Makefile:1964: recipe for target 'check-local' failed
make[2]: *** [check-local] Error 1
make[2]: Leaving directory '/home/jay/grpc/third_party/protobuf'
Makefile:1826: recipe for target 'check-am' failed
make[1]: *** [check-am] Error 2
make[1]: Leaving directory '/home/jay/grpc/third_party/protobuf'
Makefile:1538: recipe for target 'check-recursive' failed
make: *** [check-recursive] Error 1

Any hints?

Thx,

S

[Nicolas Noble]

At that point, your issue is with protobuf, not with grpc. I'd suggest following their own installation instructions separately at https://github.com/protocolbuffers/protobuf/blob/master/src/README.md

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[Simon Chamlian]

Thanks Nicolas.

I did follow their instructions and I got:

============================================================================
Testsuite summary for Protocol Buffers 3.6.1
============================================================================
# TOTAL: 7
# PASS:  7
# SKIP:  0
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0
============================================================================

But still getting same error message with the example:

jay@Nembuntu:~/grpc/examples/cpp/helloworld$ make
 DEPENDENCY ERROR

You don't have the grpc c++ protobuf plugin installed in your path.
Please install grpc. You can find it here:

   https://github.com/grpc/grpc

Here is what I get when trying to detect if you have the plugin:

which grpc_cpp_plugin
Makefile:104: recipe for target 'system-check' failed
make: [system-check] Error 1 (ignored)


Makefile:104: recipe for target 'system-check' failed
make: *** [system-check] Error 1

jay@Nembuntu:~/grpc/examples/cpp/helloworld$ ~

When I look in the Makefile, I see that this error message is generated on:

ifneq ($(HAS_PLUGIN),true)
    @echo " DEPENDENCY ERROR"
    @echo
    @echo "You don't have the grpc c++ protobuf plugin installed in your path."
    @echo "Please install grpc. You can find it here:"
    @echo
    @echo "   https://github.com/grpc/grpc"
    @echo
    @echo "Here is what I get when trying to detect if you have the plugin:"
    @echo
    -which $(GRPC_CPP_PLUGIN)
    @echo
    @echo
endif

where

PROTOC = protoc

PROTOC_CHECK_CMD = $(PROTOC) --version | grep -q libprotoc.3
PLUGIN_CHECK_CMD = which $(GRPC_CPP_PLUGIN)

HAS_PLUGIN = $(shell $(PLUGIN_CHECK_CMD) > /dev/null && echo true || echo false

So basically, it is doing a (protoc --version | grep -q libprotoc.3):

jay@Nembuntu:~/grpc/examples/cpp/helloworld$ protoc --version | grep -q libprotoc.3

jay@Nembuntu:~/grpc/examples/cpp/helloworld$

But

jay@Nembuntu:~/grpc/examples/cpp/helloworld$ protoc --version
libprotoc 3.6.1


jay@Nembuntu:~/grpc/examples/cpp/helloworld$ protoc --version | grep libprotoc.3
libprotoc 3.6.1

Could it be that the -q in the grep is incorrect?

S.

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[Nicolas Noble]

-q means quiet. It transforms the behavior of grep to exit with a "true" or "false" status if there was a match or not.

At the end of the day, this is really just a quick helper, as indicated by the Makefile's comments. If you're certain everything is in place on your system, remove these constrains from the example's Makefile.

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[Simon Chamlian]

Nothing worked (remove the constraints.)

I finally copied the ~/grpc folder from the working machine onto the new machine and recompiled/re-installed (make, make install) to get the example running.

Weird.  I am the only one facing this issue?

Thanks,

S