Failed to run example echo examples about wangle

[apotier]

I happen to have the same problem, with the following difference: I use this command to compile

g++ -std=c++14 -o my_server EchoServer.cpp -lfmt -lfolly -lfizz -lwangle -lpthread -lgflags -lglog -lcrypto -lc -ldouble-conversion -levent -liberty -ljemalloc -llz4 -llzma -lsnappy -lsodium -lssl -lunwind -lboost_system -lboost_fiber -lboost_context -lboost_regex -ldl

(basically I don't include dwarf, elf, asio and bz2)
It seems to me that the problem is more related to fizz than folly though.

[apotier]

Alright, the problem is not with folly, but rather with the order of the compiled libraries.
This ticket helped me solve my problem: #169

Basically to compile you should use the flags in this order:
-lwangle -lfizz -lfolly -lgflags -lglog -lpthread -ldl -lboost_context -lboost_program_options -lboost_thread -lboost_filesystem -lboost_system -lboost_regex -lboost_chrono -lssl -lcrypto -llzma -lz -lsnappy -llz4 -liberty -levent -ldouble-conversion -lsodium

[tinkerbeast]

Changing the library order does fix this problem (I can't think of a good reason why other that the dependencies not being properly handled). Anyway here is a full set of commands:

This will get a docker ubuntu 18 image ready:

apt update \
&& apt-get install -y binutils-dev bzip2 clang cmake g++ gcc git libaio-dev libboost-all-dev libbz2-dev libc-dev libdouble-conversion-dev libdwarf-dev libelf-dev libevent-dev libgflags-dev libgoogle-glog-dev libiberty-dev libjemalloc-dev liblz4-dev liblzma-dev libpthread-stubs0-dev libsnappy-dev libsodium-dev libssl-dev libunwind8-dev libunwind-dev libzstd-dev make openssl pkg-config wget zlib1g-dev \
&& cd / && git clone --depth 1 https://github.com/fmtlib/fmt.git && cd fmt \
&& mkdir _build && cd _build && cmake .. && make -j12 && make install && rm -rf /fmt \
&& cd / && wget https://github.com/facebook/folly/archive/v2019.12.23.00.tar.gz  && tar -xvf v2019.12.23.00.tar.gz && cd /folly-2019.12.23.00 \
&& mkdir _build && cd _build && cmake .. && make -j12 && make install  && rm /v2019.12.23.00.tar.gz \
&& cd / && wget https://github.com/facebookincubator/fizz/archive/v2019.12.23.00.tar.gz && tar -xvf v2019.12.23.00.tar.gz && cd /fizz-2019.12.23.00/fizz \
&& mkdir _build && cd _build && cmake .. && make -j12 && make install  && rm /v2019.12.23.00.tar.gz \
&& cd / && wget https://github.com/facebook/wangle/archive/v2019.12.23.00.tar.gz && tar -xvf v2019.12.23.00.tar.gz && cd /wangle-2019.12.23.00/wangle \
&& mkdir _build && cd _build && cmake .. && make -j12 && make install  && rm /v2019.12.23.00.tar.gz \

And this will compile the echo server:

wget https://raw.githubusercontent.com/facebook/wangle/master/wangle/example/echo/EchoServer.cpp
g++ EchoServer.cpp -lwangle -lfizz -lfolly    -lgflags -lglog    -lpthread -ldl -laio    -lboost_context -lboost_program_options -lboost_thread -lboost_filesystem -lboost_system -lboost_regex -lboost_chrono    -lbz2 -lc -ldwarf -lelf   -lssl -lcrypto -llzma -lz -lsnappy -llz4 -liberty -levent -ldouble-conversion -lsodium -ljemalloc -lunwind