Build zeromq with norm

[cc-hng]

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Issue description

I build zeromq with norm by cmake, compile with an error as below

norm_engine.hpp:18:10: fatal error: normApi.h: No such file or directory

I write a minimal norm demo, it can compiled.

cmake_minimum_required(VERSION 3.5)
project(norm_demo)

find_package(norm CONFIG REQUIRED)

get_target_property(INCLUDE_DIRS norm::norm INTERFACE_INCLUDE_DIRECTORIES)
message(STATUS "header directories: ${INCLUDE_DIRS}")

add_executable(${PROJECT_NAME} main.cpp)
target_link_libraries(${PROJECT_NAME} norm::norm)

Environment

• libzmq version (commit hash if unreleased): v4.3.4
• OS: ubuntu 20.04
• norm v1.5.9: https://github.com/USNavalResearchLaboratory/norm

Solution

#4420