I've been having issues with PostgreSQL error handling mostly on windows 64-bit using binaries I build with mingw64 and using under VC++ built PostgreSQL. Most of which I don't understand. As many have pointed out these issues MIGHT go away or be easier to debug if PostGIS was built with same tool chain as EDB VC++ distributions. I can't argue with that especially since its never been done.
The good news is changing my build chain from mingw64 GCC 4.5.4 to mingw64 GCC 4.8.0 has eradicated all of these issues,
and even ones I had with PL/V8 that happended both in a pure mingw64(w32/w64) as well as PostgreSQL VCC (32/64 bit) environment. It did
introduce this minor annoying nat, presumably because my libpq.dll now has a dependency on user32.dll (which just seems wrong). The other nat is that all the binaries I built that have c++ in them (depend on libstd++) now need to be recompiled which means my prior builds of PostGIS will not be compatible with my upcoming 4.8.0 ones. A real pain since for PostGIS/pgRouting I've got like at least 15 of those dependencies and growing. So I've decided to perform this exercise just for PostgreSQL 9.3 -- a new beginning at PostGIS 2.1 and see how it goes
before I bother with 9.2, 9.1. These issues really only affect PostgreSQL 64-bit PostGIS users and as a 64-bit user, you may never have even come across them.
