[postgis-devel] Cannot load library in cygwin PostGIS 2.4 build

[Roberto Ribeiro]

Hello Regina,

thank you very much for your answer. The dependencies of PostGIS are not
being copied into pg**/bin, so that may be a bug in the makefile concerning
Cygwin (lack of testing for the platform would certainly explain these
issues). I'm also looking at a problem specifically concerning the path to
libxml2, I'll investigate further and report later if I find anything.

Thanks again for your answer.

2018-06-07 3:55 GMT-03:00 Regina Obe <lr at pcorp.us>:

> The PostGIS 2.4 doesn't have to be in system path, it should be in your
> lib folder of PostgreSQL.
>
> I haven't used Cygwin in a while, and surprised it works, since I don't
> think anyone has been testing Cygwin compilation for PostGIS  in quite some
> time.
>
>
>
> I compile under mingw64, the default install structure I get is
>
>
>
> Pg11\lib (though PostGIS make install automatically puts it in the folder).
>
>
>
> I think Cygwin might have it as pg11\lib\postgresql or something like that
>
>
>
> And then the dependencies for PostGIS would go in pg11\bin – you should
> have a geos_c.dll, geos.dll, libproj-12.dll (might be libproj-9.dll if you
> are using < 4.9), libgdal-20.dll and all its dependencies, libxml2-2.dll
>
> Then you can add to your system path.  I usually have a launch script that
> adds these to a local launch path so I can swap out versions for testing
> and not clutter up my postgresql bin folder.
>
> .
>
>
>
> *From:* postgis-devel [mailto:postgis-devel-bounces at lists.osgeo.org] *On
> Behalf Of *Roberto Ribeiro
> *Sent:* Wednesday, June 06, 2018 11:32 AM
> *To:* PostGIS Development Discussion <postgis-devel at lists.osgeo.org>
> *Subject:* [postgis-devel] Cannot load library in cygwin PostGIS 2.4 build
>
>
>
> Hello list,
>
> I built PostGIS today using Cygwin, and it did so with no problems.
> However, if I try to create extension in an existing db, it returns the
> error message: "could not load library <path/postgis-2.4.dll>: No such file
> or directory".
>
> I searched online, seems like this is a common error, however the two
> common workarounds did not apply to me: first is to check if build
> architecture matches that of Postgres (yes, both are 64bits compiled on
> cygwin); second is to check if the dll is in the system PATH (it is).
>
> Does anyone have any idea what could be the problem?
>
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