[MESOS-8691] Forward CXX_FLAGS to C++ projects and C_FLAGS to C projects in CMake

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.6.0
• Epic Link: cmake-improvements
• Assignee: Andrew Schwartzmeyer
• Reporter: Andrew Schwartzmeyer
• Created: 19/Mar/18 20:25
• Updated: 19/Mar/18 20:26
• Resolved: 19/Mar/18 20:26

Description

Right now we forward CXX and C flags together to all 3rdparty depedencies. This results in warnings from CMake for the projects that don't use these flags. Specifically, dependencies like libevent which are C libraries ignore the CXX flags.

We should instead pass the C flags only (and generic CMake flags) to these dependencies so they don't complain.