René Buffat

There are still some regressions: The cmake configuration step emits the following warning and I'm not exactly sure why: ``` CMake Warning: Ignoring extra path from command line: "/" ```...

It looks like the precision parameter does not support "GeometryCollection": https://github.com/Toblerity/Fiona/blob/master/fiona/_transform.pyx#L166-L220

Could you check if the maximum integer you want to write is bigger than 2 ** 63 - 1? This is the maximum integer size gdal supports. ([OGR_F_SetFieldInteger64](https://gdal.org/doxygen/ogr__api_8h.html#a1c95abf476d0ad250eb7499627f0e3b1) takes a...

It should be fairly easy to port the travis tests to github CI. I could create a PR.

https://gdal.org/drivers/vector/openfilegdb.html mentions ```It can also read directly zipped .gdb directories (with .gdb.zip extension), provided they contain a .gdb directory at their first level.```. But I did not test this.

It looks like `libexpat.so.1` is not included in the 1.8.21 wheels while it was included in the 1.8.20 wheels. When I unpack the `Fiona-1.8.21-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64` wheel the output of `ldd libgdal-e127aa65.so.30.0.1`...

@achapkowski I'm not sure that you observe the same issue, as 1) this is related to changes in Python 3.8 and 2) python 3.6 seems not to be the problem...

If you encounter an error message of the form of `ImportError: DLL load failed while importing ogrext: The specified module could not be found.` it is a general error that...

@swiss-knight Could you provide information about how you installed your gdal, rasterio or Fiona? E.g. did you use the ubuntu packages (apt get install ...), or did you install Fiona...

Both rasterio as well as fiona patch the environment variable GDAL_DATA if the variable is not already set (if they are installed as wheel). ``` >>> import os >>> print(os.getenv('GDAL_DATA',...