wrong libprotoc.so library

Hi, Since release 0.2 I’m getting the following error as i follow your INSTALL.MD :

libprotoc.so.15: cannot open shared object file: No such file or directory
make: *** [/grpc-web/third_party/grpc/gens/src/proto/grpc/channelz/channelz.pb.cc] Error 127

I’ve worked with the 0.1 version of grpc-web succesfully on an ubuntu machine but due to various issues I’m now on an arch system with the latest version of grpc-web. I’ve created a Dockerfile starting from ubuntu 16.04 in order to asses the problem’s not the os, but the problem persists (same line but with a different path, which is the one i pasted)

Either I’m missing something from install.md or there’s something missing in it… I suggest adding a install.sh script to prevent user errors.

FROM ubuntu:16.04

RUN apt-get update
RUN apt-get install -y autoconf automake build-essential curl git \
  default-jdk default-jre libtool libpcre3-dev libssl-dev make wget zip

RUN git clone https://github.com/grpc/grpc-web.git
WORKDIR /grpc-web/scripts
RUN ./init_submodules.sh

WORKDIR /grpc-web
RUN git submodule update --init
WORKDIR /grpc-web/third_party/grpc
RUN git submodule update --init

WORKDIR /grpc-web/third_party/grpc/third_party/protobuf
RUN ./autogen.sh \
    && ./configure \
    && make \
    && make install

WORKDIR /grpc-web/third_party/grpc
RUN make && make install

WORKDIR /grpc-web
RUN wget https://dl.google.com/closure-compiler/compiler-latest.zip -O compiler-latest.zip \
    && unzip -p -qq -o compiler-latest.zip *.jar > closure-compiler.jar \
    && make

[stanley-cheung]

After you run sudo make install from the third_party/protobuf directory, perhaps try running sudo ldconfig? It seems that you have another libprotoc installed in your system and protoc-gen-grpc-web got confused.

[Tails128]

Yup, we can close the issue. Sorry if it took me a while to answer, I wanted to do a couple tests to be sure!