Compiling GRPC C++ service statically - c++

Question

I am trying to deploy a C++ GRPC server on docker. Unfortunately, the grpc examples use dynamically linked GRPC libraries. When copying the executables to docker (e.g. a small alpine based one) it responds "not found". The underlying problem is that the executable depends on dynamically linked GRPC libraries.
I updated the example Makefile of GRPC to [only change is adding -static]
HOST_SYSTEM = $(shell uname | cut -f 1 -d_)
SYSTEM ?= $(HOST_SYSTEM)
CXX = g++
CPPFLAGS += `pkg-config --cflags protobuf grpc`
CXXFLAGS += -std=c++11
ifeq ($(SYSTEM),Darwin)
LDFLAGS += -L/usr/local/lib `pkg-config --libs protobuf grpc++ grpc`\
-lgrpc++_reflection\
-ldl
else
LDFLAGS += -L/usr/local/lib `pkg-config --libs protobuf grpc++ grpc`\
-Wl,--no-as-needed -lgrpc++_reflection -Wl,--as-needed\
-ldl
endif
PROTOC = protoc
GRPC_CPP_PLUGIN = grpc_cpp_plugin
GRPC_CPP_PLUGIN_PATH ?= `which $(GRPC_CPP_PLUGIN)`
PROTOS_PATH = ../../protos
vpath %.proto $(PROTOS_PATH)
all: system-check greeter_client greeter_server greeter_async_client greeter_async_client2 greeter_async_server
greeter_client: helloworld.pb.o helloworld.grpc.pb.o greeter_client.o
$(CXX) $^ $(LDFLAGS) -o $# -static
However, this runs into
Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x43d): undefined reference to `deflateInit2_'
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x44e): undefined reference to `deflate'
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x4bb): undefined reference to `deflateEnd'
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x5bc): undefined reference to `inflateInit2_'
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x5cb): undefined reference to `inflate'
/usr/local/lib/libgrpc.a(message_compress.o):(.text+0x63b): undefined reference to `inflateEnd'
How can I adjust this to get a working statically compiled GRPC client / server?

Answer 1

You are missing link compress library, using -lz to fix this bug.