[boost] PGI C++ compiler support

Subject: [boost] PGI C++ compiler support
From: David Olsen (dolsen_at_[hidden])
Date: 2017-07-26 20:57:32

Many years ago, Boost was configured to work well with the PGI C++ 
compiler (http://www.pgroup.com/).  But maintenance of the PGI support 
within Boost stopped about five years ago, and PGI will no longer build 
Boost without modifications to the Boost sources.

I am working on restoring support for the PGI C++ compiler.  Many PGI 
customers want to use Boost, so we at PGI are putting in the effort to 
make that easy to do.  I have already fixed a bunch of bugs in the PGI 
compiler that were triggered by Boost code.  Now it is time to make 
necessary adjustments to the Boost source.

I have created six pull requests that make it possible to build Boost 
with PGI.
https://github.com/boostorg/build/pull/218
https://github.com/boostorg/filesystem/pull/49
https://github.com/boostorg/mpl/pull/30
https://github.com/boostorg/spirit/pull/236
https://github.com/boostorg/type_traits/pull/45
https://github.com/boostorg/config/pull/169

The only big change is overhauling the pgi.jam file.  The other changes 
are just removing an obsolete #if or changing an #if expression.  None 
of the changes should affect any compiler other than PGI.

Next I am planning to make any necessary changes to test code and to 
header-only libraries so that PGI gets decent results when running the 
Boost tests.  Then I will look into setting up a test bot for the PGI 
compiler here at PGI.

--
David Olsen (dolsen_at_[hidden])
NVIDIA - PGI
Beaverton, Oregon