Trying to compile in CentOS 7 (want to know what compiler is used at Facebook?) about openr

[saifhhasan]

Quick googling releavs that this is bug in devtoolset-7 just like you mentioned.
https://bugzilla.redhat.com/show_bug.cgi?id=1519073

You will need devtoolset-7.1 to get pass this error. You might pull latest devtoolset (from trunk if possible) and compile with it. Here we use CentOS but don't rely on devtoolsets for compilation. Our internal build systems leverages specific gcc-5+ version which supports c++14 very well.

[jeroen-dhollander]

Thanks for the answer.

After you mentioned you use gcc-5 I took a closer look at devtoolset-6 (which uses gcc-6),
and I realized the failure was not due to C++14 but due to an interop issue with folly.

So I opened an issue there,
but for now I managed to work around it, so I can now compile on CentOS 7.

@anyone else reading this looking for the same answer: The solution turned out to be to simply use devtoolset-6, and use the patch here for the folly issue

[saifhhasan]

Thanks @jeroen-dhollander for posting patch for future references. Will go ahead and close the issue then :)