Cannot find "Findaws-lambda-runtime.cmake" on ubuntu18.04 - c++

Question

Trying to build the hello world example, but the cmake always complain
By not providing "Findaws-lambda-runtime.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided by
"aws-lambda-runtime", but CMake did not find one.
Environment
OS : ubuntu18.04.3 LTS,64bits
install curl by : sudo apt-get install libcurl4-openssl-dev
install cmake by ubuntu software(cmake version 3.16.1)
Steps to build and install aws lambda cpp
git clone https://github.com/awslabs/aws-lambda-cpp.git
cd aws-lambda-cpp
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=OFF \
-DCMAKE_INSTALL_PREFIX=${PWD}/install
make -j2
sudo make install
CmakeLists.txt(omit another part, want to make sure find_package works first)
cmake_minimum_required(VERSION 3.5)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
project(aws_cpp_test LANGUAGES CXX)
list(APPEND CMAKE_MODULE_PATH "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/build/")
list(APPEND CMAKE_MODULE_PATH "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/")
find_package(aws-lambda-runtime REQUIRED)
add_executable(${PROJECT_NAME} "main.cpp")
I do not use the ec2 to build the project, how could I tell the cmake where should it find the aws-lambda-runtime?
Edit :
Based on the suggestion of Yevhenii Mamontov, I change the CMakeLists.txt to
cmake_minimum_required(VERSION 3.5)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
project(aws_cpp_test LANGUAGES CXX)
set(AWS_LAMBDA_CMAKE "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/")
set(CMAKE_PREFIX_PATH "${AWS_LAMBDA_CMAKE};${CMAKE_PREFIX_PATH}")
#check the prefix paths are correct or wrong
foreach(path ${CMAKE_PREFIX_PATH})
message("Path: " ${path})
endforeach(path)
find_package(aws-lambda-runtime REQUIRED)
But it come with different error message
CMake Error at
/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/aws-lambda-runtime-config.cmake:6
(include): include could not find load file:
/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/#CMAKE_PROJECT_NAME#-targets.cmake
I tried with different paths
set(AWS_LAMBDA_CMAKE "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/build/install")
set(AWS_LAMBDA_CMAKE "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/build/install/lib/aws-lambda-runtime/cmake")
and tried to do not add any new path, but all of them give the same error messages
Edit 2 :
Find a way to make it work
Remove the contents of /home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/aws-lambda-runtime-config.cmake
set path as set(AWS_LAMBDA_CMAKE "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/build/install/lib/aws-lambda-runtime/cmake")
However, this solution is awkward, should ask the cmake do not search from the path "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake" first
Edit 3:
The solution I written in Edit 2 do not work. It fail when I add
add_executable(${PROJECT_NAME} "main.cpp")
target_link_libraries(${PROJECT_NAME} PUBLIC AWS::aws-lambda-runtime)
Error messages are
Target "aws_cpp_test" links to target "AWS::aws-lambda-runtime" but the
target was not found. Perhaps a find_package() call is missing for an
IMPORTED target, or an ALIAS target is missing?

Answer 1

Could you try to set CMAKE_PREFIX_PATH just before the find_package?
Something like this:
set(AWS_LAMBDA_CMAKE "/home/yyyy/Qt/3rdLibs/aws-lambda-cpp/cmake/")
set(CMAKE_PREFIX_PATH "${AWS_LAMBDA_CMAKE};${CMAKE_PREFIX_PATH}")
The first set() creates a variable with the path to your lib cmake folder.
The second set() appends to CMAKE_PREFIX_PATH one more path to search for any package that you've indicated in find_package().

Answer 2

Find out the solution, all you need to do are set the path of the aws library installed.
Example:
cmake_minimum_required(VERSION 3.5)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
project(encoder LANGUAGES CXX)
set(AWS_LAMBDA_CMAKE ${CMAKE_CURRENT_SOURCE_DIR}/../../3rdLibs/aws-lambda-cpp/build/install/)
set(AWS_LAMBDA_CPP_SDK ${CMAKE_CURRENT_SOURCE_DIR}/../../3rdLibs/aws-sdk-cpp/build/install/)
set(CMAKE_PREFIX_PATH "${AWS_LAMBDA_CMAKE};${CMAKE_PREFIX_PATH};${AWS_LAMBDA_CPP_SDK}")
find_package(CURL REQUIRED)
find_package(aws-lambda-runtime REQUIRED)
find_package(AWSSDK COMPONENTS s3)
add_executable(${PROJECT_NAME} "main.cpp")
target_link_libraries(${PROJECT_NAME}
${CURL_LIBRARIES}
AWS::aws-lambda-runtime
${AWSSDK_LINK_LIBRARIES})
aws_lambda_package_target(${PROJECT_NAME})
You may need to install following libs on your ubuntu if you haven't
sudo apt-get install zlib1g-dev libssl-dev libcurl4-openssl-dev

Answer 3

I got the same error, the answer marked as solution worked pretty well, but I also found tha this works:
set(aws-lambda-runtime_DIR /lib/aws-lambda/lib64/aws-lambda-runtime/cmake/)
I am using CMake 3.13 and had the lambda runtime installed on "/lib/aws-lambda" when running tha cmake as instructed by the installation instructions:
cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/lib/aws-lambda