Aws-sdk-cpp: Issues Building Project With Cmake and aws-sdk-cpp_DIR

[Skarlso]

Hi.

So, I was following steps here:

https://aws.amazon.com/blogs/developer/using-cmake-exports-with-the-aws-sdk-for-c/

My project is a little bit more complex, with multiple project files, but it essentially boils down to these parts:

...
find_package(aws-sdk-cpp)

# Use the created library to link to the source.
add_executable(furnace $<TARGET_OBJECTS:furnace_object> furnace.cpp)

# I tried the blog post aws-cpp-sdk-core ( but maybe that's a typo? )
target_link_libraries(furnace aws-sdk-cpp-core)
...

And then calling this:

cd build
cmake –Daws-sdk-cpp_DIR="/Users/-...-/aws/aws-sdk-cpp-1.0.51/build/" ..

Also, I've built the project on osx. I used it previously, if I hardcoded all the path everywhere, which is less than ideal. So I know the library works fine.

What I'm getting when I'm running this is:

CMake Warning at furnace/CMakeLists.txt:8 (find_package):
  By not providing "Findaws-sdk-cpp.cmake" in CMAKE_MODULE_PATH this project
  has asked CMake to find a package configuration file provided by
  "aws-sdk-cpp", but CMake did not find one.

  Could not find a package configuration file provided by "aws-sdk-cpp" with
  any of the following names:

    aws-sdk-cppConfig.cmake
    aws-sdk-cpp-config.cmake

  Add the installation prefix of "aws-sdk-cpp" to CMAKE_PREFIX_PATH or set
  "aws-sdk-cpp_DIR" to a directory containing one of the above files.  If
  "aws-sdk-cpp" provides a separate development package or SDK, be sure it
  has been installed.

The files it's looking for IS THERE.

The whole project can be located here => https://github.com/Skarlso/furnace

Any advice / help is very welcomed!

I'm building by hand. The operating system is OSX. And it's not an IOS project.

Thank you in advance.
Gergely.

[Skarlso]

So I solved this.

Apparently, the blog post is NOT a typo. Which is totally insane actually.

Also, apparently, cmake -Daws-sdk-cpp_DIR DID NOT WORK.

However, getting it as an environment variable and setting it in CMAKE worked.

# Find the installed AWS core package
# Don't need all of them
set(aws-sdk-cpp_DIR $ENV{AWS_SDK_CPP_DIR})
find_package(aws-sdk-cpp)

# Use the created library to link to the source.
add_executable(furnace $<TARGET_OBJECTS:furnace_object> furnace.cpp)

target_link_libraries(furnace aws-cpp-sdk-core)

Notice that the exported target is aws-cpp-sdk-core instead of aws-sdk-cpp-core as you would expect.

Is this intentional?

Cheers,
Gergely.

[bretambrose]

Using a standard cmake command line option like CMAKE_PREFIX_PATH also works. I prefer that since it's easier to remember and more generic, especially across projects.

As far cpp-sdk vs. sdk-cpp goes, that was an accidental decision made very, very early in the project that now taunts us from an unchangeable position (due to backwards compatibility).

[Skarlso]

Yes, but what if I want to set CMAKE_PREFIX_PATH to something else? :) I would rather use something specific. :)

Thanks for the heads up!

This can be closed.

[RobertHerreraEECS]

Can someone provide context on what their CMake Text file looks like. I've tried following the thread and the posted solution... but still no luck. Thx

[Skarlso]

@RobertHerreraEECS Hey Robert. You can take a peak at my project here: https://github.com/Skarlso/furnace/blob/master/CMakeLists.txt.

I haven't updated it though in a while because frankly, the CPP AWS sdk is terrible in this way that I have to download some gigs of stuff to get parts working. I setup a docker container which had prebuilt libraries so travis could test with the container. That's here: https://hub.docker.com/r/skarlso/gcc/ Have fun.

[RobertHerreraEECS]

Thanks @Skarlso much appreciated! Did you use the cmake –Daws-sdk-cpp_DIR="/Users/-...-/aws/aws-sdk-cpp-1.0.51/build/" .. convention when calling cmake?

[Skarlso]

No, I think that didn't work in the end. Look at this script how it builds the SDK:
https://github.com/Skarlso/furnace/blob/master/scripts/prepare-aws-sdk.sh

[jhodges]

For what it's worth, I got the –Daws-sdk-cpp_DIR= to work correctly if the directory passed is the fullpath, so /Users/... on macOS.

[dblock]

For what it's worth, I got the –Daws-sdk-cpp_DIR= to work correctly if the directory passed is the fullpath, so /Users/... on macOS.

I can't get it to work with the instructions in that blog post (cmake -Daws-sdk-cpp_DIR=full path). Is the blog post incorrect? I will get it fixed.

[KaibaLopez]

Hi @dblock,
I think the blog post is a bit outdated... could you try and change the cmake to something like:

cmake_minimum_required(VERSION 3.5)
project(s3Sample)
find_package(AWSSDK REQUIRED COMPONENTS s3)
set(CMAKE_CXX_STANDARD 11)
add_executable(Sample "main.cpp")
# list all deps for static linking
target_link_libraries(Sample ${AWSSDK_LINK_LIBRARIES})
target_compile_options(Sample PRIVATE "-Wall" "-Werror")

this assumes that your ran make install on the sdk before hand though.

[dblock]

I've reopened https://github.com/aws/aws-sdk-cpp/issues/1334 which has a different error related to dependencies, rather than adding more to this issue here. I shouldn't need to globally make install the SDK either, but that doesn't help anyway. I'll update everything when I can make it work.