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Build: Only export symbols if building DLL #1773

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merged 1 commit into from Dec 11, 2019

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orudge
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@orudge orudge commented Dec 4, 2019

If you build Proj as a static library (e.g., using vcpkg), then subsequently build a DLL linking to the Proj libraries, all the Proj symbols get exported in your DLL.

@rouault
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rouault commented Dec 11, 2019

ping @cffk : could you review the change in geodesic.h ?

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cffk commented Dec 11, 2019

ping @cffk : could you review the change in geodesic.h ?

This looks fine...

@rouault rouault merged commit 5b4e60f into OSGeo:master Dec 11, 2019
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cffk commented Dec 12, 2019

Sorry to second guess myself. But I don't see where geodesic.h has a
dllimport option when used by a program that links to proj. Also
instead of the cmake files for the utilities setting
PROJ_MSVC_DLL_IMPORT=1, wouldn't it make more sense for the library to
make this an INTERFACE definition?

I'm not familiar enough with the intricacies of Windows dlls to know how
this might need to be fixed without actually trying it -- and
unfortunately, I'm off on vacation soon and so won't be able to look
into this until the beginning of Jan.

@kbevers kbevers added this to the 6.3.0 milestone Dec 12, 2019
@orudge orudge deleted the msvc-no-static-exports branch May 28, 2020
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4 participants