In 2.3 the installed header files is limited to a fixed list. That is a good thing. Even better would be to install the header files into a GDAL specific subdir.

However, that change broke one thing: the bindings cannot now be built against the public header files. At least cpl_vsi_error.h is needed(1).

But, I'm wondering should the bindings be separately buildable anyway. The bindings are pretty much married to the specific version of the source tree.

The case above is a CI run where I'm building the Perl bindings separately with the help of another Perl module (Alien::gdal), which does the actual download-build workflow for GDAL. The reason for this is to have the GDAL Perl bindings in CPAN as a stand-alone and testable module. That's a good reason, however, I'm moving to recommending using the FFI based module (Geo-GDAL-FFI), which is more robust and doesn't need the header files to install and run.



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