[Proj] Compiling Proj 5.2.0

[Roger Oberholtzer]

I just tried building proj 5.2.0 on Linux with g++, and I got this:

>[   37s] checking whether g++ supports C++11 features with -h std=c++11... no
>[   37s] configure: error: *** A compiler with support for C++11

Shouldn't the test

     -h std=c++1

be

     -std=c++11

-- 
Roger Oberholtzer