--grpc_out: protoc-gen-grpc: Plugin killed by signal 6.

[appanna-yaragal64]

I have created new project and installing below pod
pod 'googleapis', :path => '.'

But i am getting below error

[!] /bin/bash -c
set -e
Pods/!ProtoCompiler/protoc --plugin=protoc-gen-grpc=Pods/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin --objc_out=. --grpc_out=. -I . -I Pods/!ProtoCompiler google//.proto google////.proto

google/cloud/speech/v1/cloud_speech.proto:11:1: warning: Import google/protobuf/any.proto is unused.
google/cloud/speech/v1/cloud_speech.proto:12:1: warning: Import google/protobuf/duration.proto is unused.
dyld: Library not loaded: /usr/local/lib/libprotoc.22.dylib
Referenced from: /Volumes/Development/Sample Projects/GoogleSpeechTestApp/Pods/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin
Reason: image not found
--grpc_out: protoc-gen-grpc: Plugin killed by signal 6.

[maninp]

I'm also having the same issue after running "pod update".
Before pod update

Installing !ProtoCompiler-gRPCPlugin (1.24.2)

after pod update

Installing !ProtoCompiler-gRPCPlugin (1.28.0)

Please help me to resolve this.

[stanley-cheung]

@appuyaragal12 from the error message, looks like you haven't installed protobuf yet. With reference to https://grpc.io/docs/quickstart/objective-c/, have you brew install protobuf?

[muxi]

@stanley-cheung - I this case I think Cocoapods is supposed to download the protobuf plugin for them (see !ProtobufCompiler-gRPCPlugin.podspec into the directory Pods/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin. Probably for some reason the plugin was not found there?

@appuyaragal12 - could you check if the plugin exists in that directory?

[maninp]

I have resolved this by downgrading to older version by editing googleapis.podspec

s.dependency "!ProtoCompiler-gRPCPlugin", "~> 1.24.2"

[yulin-liang]

@appuyaragal12 - Could you check if you can find libprotoc.22.dylib in the /usr/local/lib directory? I can reproduce the error after deleting libprotoc.22.dylib.

[jaankoi]

I'm facing this same issue now also after I run 'pod update'.

[muxi]

I think I know what the problem is now. We'll fix it soon.

[emlynmac]

Hi,

I'm running into this issue also.
From a bunch of experimentation this morning, if I roll !ProtoCompiler-gRPCPlugin past 1.27.0, then the external dependencies on dylibs are present.

1.28.x does not fix it, nor does 1.29.

I've been able to have pod install work with:
s.dependency "!ProtoCompiler-gRPCPlugin", "1.27.0" in my googleapis.podspec.

For my case, I can't install local libraries - this needs to work on circleCI.

[muxi]

@emlynmac - Do you still see the external dependencies on 1.29? We think we have it fixed in 1.29.0. We are also planning to release 1.28.2 that contains this fix. Would be surprising to us if you still see them in 1.29.0.

[emlynmac]

@muxi Yes - the issue with external dependencies is present on 1.29. Let me just grab a log...

Here:

Installing !ProtoCompiler (3.11.2)
Installing !ProtoCompiler-gRPCPlugin (1.29.0)
...
...

Installing gRPC (1.29.0)
Installing gRPC-Core (1.29.0)
Installing gRPC-ProtoRPC (1.29.0)
Installing gRPC-RxLibrary (1.29.0)
Installing googleapis (0.0.1)

[!] /bin/bash -c 
set -e
Pods/!ProtoCompiler/protoc         --objc_opt=named_framework_to_proto_path_mappings_path=./protomap         --plugin=protoc-gen-grpc=Pods/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin         --objc_out=.         --grpc_out=.         -I .         -I Pods/!ProtoCompiler         google/*/*.proto google/*/*/*/*.proto

dyld: Library not loaded: /usr/local/opt/c-ares/lib/libcares.2.dylib
  Referenced from: /Users/Code/ios/Pods/!ProtoCompiler-gRPCPlugin/grpc_objective_c_plugin
  Reason: image not found
--grpc_out: protoc-gen-grpc: Plugin killed by signal 6.

[yulin-liang]

@emlynmac I ran into this issue if I installed the 1.28.0 version.

But after running pod update, looks like 1.29.0 works for me. Can you double-check if the version of !ProtoCompiler-gRPCPlugin is 1.29.0?

[emlynmac]

@yulin-liang I have updated the post with more info; it is 1.29.
I expect that you have the dependent library already on your system, installed by home-brew or ports. If it is a clean install, it will not be there.

[muxi]

@emlynmac - I see. Thanks for the info.

@yulin-liang - Looks like the dependency of libprotoc is resolved in 1.29, but there's still a dependency to libcares.

[yulin-liang]

@emlynmac I've already fixed this issue. Can you try it on 1.29.1?

[emlynmac]

@yulin-liang Thanks greatly! I can confirm that 1.29.1 works for me.