Fix libgdal-pdf that fails to work

[rouault]

due to poppler not being found when building libgdal-core

which causes the plugin to emit the following and not being functional:

Warning 1: Driver PDF declares DMD_OPENOPTIONLIST whereas its proxy doesn't declare it or with a different value
Warning 1: Driver PDF declares DCAP_OPEN whereas its proxy doesn't declare it or with a different value
Warning 1: Driver PDF declares DMD_SUBDATASETS whereas its proxy doesn't declare it or with a different value
Warning 1: Proxy driver PDF declares a pfnIdentify callback whereas the real driver does not.
Warning 1: Driver PDF declares a pfnOpen callback whereas its proxy doest not declare DCAP_OPEN

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found it was in an excellent condition.

[akrherz]

poppler was one of the main things that drove #722. Does poppler just need to be present at build time and not at run?

[rouault]

Does poppler just need to be present at build time and not at run?

just at build time. Technically it doesn't even need to be there. Just having -DHAVE_POPPLER in CXXFLAGS of libgdal-core should be enough

[akrherz]

just at build time.

I believe adding it as a dep will cause it to be added as a run dep, unless we do some tricks. Will research this more soon and hopefully I am wrong :)

[rouault]

Technically it doesn't even need to be there. Just having -DHAVE_POPPLER in CXXFLAGS of libgdal-core should be enough

trying that approach in #976

[xylar]

I believe adding it as a dep will cause it to be added as a run dep, unless we do some tricks.

I don't think so. I didn't see any run_exports:
https://github.com/conda-forge/poppler-feedstock/blob/main/recipe/meta.yaml

[akrherz]

Can a simple test be added to the libgdal-pdf artifact section to ensure that it is working?

[rouault]

Can a simple test be added to the libgdal-pdf artifact section to ensure that it is working?

attempted in #976 with 41f6713

[rouault]

closing as superseded per #976