[macports-ports] branch boost-update created (now e71c31ec9af)

[Chris Jones]

Chris Jones (cjones051073) pushed a change to branch boost-update
in repository macports-ports.

      at e71c31ec9af dssp: Migrate to boost PG, use boost 1.76

This branch includes the following new commits:

     new 01e379de8f5 boost176: New port, providing boost 1.76 Installation is isolated under ${prefix}/libexec/boost176 to allow parallel installation of multiple boost versions.
     new 1d4803bf804 boost171: New port, providing boost 1.71 Installation is isolated under ${prefix}/libexec/boost171 to allow parallel installation of multiple boost versions.
     new 01ed878b53c boost PG: New PortGroup to centralise the configuration of ports using boost
     new 7bc505bd861 opencolorio: Migrate to boost PG
     new 1ed9a6f1d7e astroid: Migrate to boost PG
     new 39a57788377 xylib: Migrate to boost PG
     new 6422beb05b8 boost PG: Append isystem flag to cxxflags not cppflags
     new 82ea2ce4c44 gerbil: Migrate to boost PG
     new e71c31ec9af dssp: Migrate to boost PG, use boost 1.76

The 9 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.