[Users] Compiling ET Using PGI

[Haas, Roland]

Hello Chris,

> Roland pointed out that I may be using an incorrect flag to include the
> c++11 standards so I'll review that as well. I also attached my config file
> in case that helps.
You should be able to make it work by adding the option I provided to
CXXFLAGS:

CXXFLAGS = -std=c++11

though you will probably have to add something like:

CFLAGS = -D_GNU_SOURCE
CXXFLAGS = -D_GNU_SOURCE -std=c++11

b/c some of the features that Cactus needs go beyond the strict
standard and are part of POSIX (2008 I think), and _GNU_SOURCE just
gives you all of it (for glibc / libstdc++).

I believe the configure script will tell you exactly what is needed if
you run without -D_GNU_SOURCE once.

Yours,
Roland

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