[Proj] Introducing some intrusive (but API neutral) code changes in PROJ.4

[Thomas Knudsen]

Hello proj users

I have recently submitted a pull request for PROJ.4, introducing some
rather intrusive code changes which will (hopefully) make a large part of
the PROJ.4 code easier to read, maintain, and contribute to.

Basically, the pull request will eliminate a large proportion of the
somewhat convoluted macros that currently enforces the implementation
policy for the projection code in PROJ.4. It should, however, not introduce
any changes API-wise, so most users of the library, and the proj, cs2cs,
and nad2nad programs should be unaffected.

If you suspect your use case may be affected anyway (or if you may be in a
position to offer helpful comments), please take a look at the pull request
over at https://github.com/OSGeo/proj.4/pull/373

Thomas Knudsen

Geodesist, PhD

thokn at sdfe.dk

Danish Ministry of Energy, Utilities and Climate

Agency for Data Supply and Efficiency
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