Bug report

rclcpp won't compile using a 64-bit architecture on Clang++
Required Info:

• Operating System:
  • OSX Mojave
• Installation type:
  • Source
• Version or commit hash:
  • 0.5.1, but looks to be present in newer versions
• DDS implementation:
  Fast-RTPS
• Client library (if applicable):
  • rclcpp

Steps to reproduce issue

Attempt to compile rclcpp using 64-bit clang

Expected behavior

Compiles

Actual behavior

Error thrown, type error between long and long long when parameter_client.cpp calls client->wait_for_service()

Additional information

https://stackoverflow.com/questions/36302993/clangs-libc-using-long-long-in-the-definition-of-stdchronoduration

Looks to be a clang specific issue with regards to how it implements std::chrono