Compilation of .cu (CUDA) files fail when linking against AWS SDK

[lablabla]

Confirm by changing [ ] to [x] below to ensure that it's a bug:

• I've gone though Developer Guide and API reference
• I've searched for previous similar issues and didn't find any solution

Describe the bug
Compiling a project that uses both AWS sdk and CUDA causes compilation error nvcc fatal : Unknown option 'pthread'

SDK version number
1.7.111
CUDA version 10.0.130
CMake 3.14

Platform/OS/Hardware/Device
What are you running the sdk on?
Ubuntu 16.04

To Reproduce (observed behavior)
Steps to reproduce the behavior (please share code)

CMakeLists.txt
----------------
cmake_minimum_required (VERSION 3.12)
enable_language(CUDA)

find_package(AWSSDK REQUIRED COMPONENTS s3)


add_executable(exec main.cpp cuda.cu)

target_link_libraries(exec
        ${AWSSDK_LINK_LIBRARIES})

main.cpp
-----------
#include <iostream>

int main()
{
    std::cout << "Hello, World!" << std::endl;
    return 0;
}

cuda.cu is empty

Expected behavior
Compilation should succeed

Logs/output

Scanning dependencies of target exec
[ 25%] Building CXX object CMakeFiles/exec.dir/main.cpp.o
[ 50%] Building CUDA object CMakeFiles/exec.dir/cuda.cu.o
nvcc fatal   : Unknown option 'pthread'
CMakeFiles/exec.dir/build.make:75: recipe for target 'CMakeFiles/exec.dir/cuda.cu.o' failed
make[3]: *** [CMakeFiles/exec.dir/cuda.cu.o] Error 1

Additional context
After digging around we saw that linking ${AWSSDK_LINK_LIBRARIES} adds -pthread to the CUDA_FLAGS

[lablabla]

This seems to maybe be a cmake issue.
If I change the enable_language(CUDA) to the old find_package(CUDA), it works fine

closing

[lablabla]

Well,
After checking it more with CMake (here) looks like the problem might come from AWS after all
Checked with CMake 3.14 & 3.17

cmake_minimum_required (VERSION 3.12)
enable_language(CUDA) 

#find_package(AWSSDK REQUIRED COMPONENTS s3)

set (THREADS_PREFER_PTHREAD_FLAG ON)
find_package (Threads REQUIRED)

add_executable(exec main.cpp cuda.cu)

target_link_libraries(exec
        ${AWSSDK_LINK_LIBRARIES}
        ${CMAKE_THREAD_LIBS_INIT})

Enabling the find_package(AWSSDK) line will cause the -pthread flag to be added to the CUDA flags. finding pthread the normal way won't affect the CUDA flags

[KaibaLopez]

Hi @lablabla ,
Sorry for the wait, I was finally able to get around to test this, but it is not showing me the error you're talking about.
I have both a simple cuda sample from their even easier introduccion and a simple s3 upload object sample working on the same project compiling with no problems.

I used your same CMakeLists.txt too and was not able to reproduce your error.
My setup is a bit different than yours though:

cmake version 1.13 (shouldn't matter as you tested previous and newer versions)
Cuda compilation tools, release 10.0, V10.0.130
SDK Version: 1.7.314
Ubuntu 18.04
gcc 7.4

Not sure, but could you try upgrading the sdk to the newer versions see if by some off chance we inadvertently fixed this?

[justinpa-asg]

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