Drop support for gdal 1.X

Cédric Traizetrequested to merge
1769_drop_support_gdal_1 into develop

Summary

This merge request removes support for GDAL 1.X.

Rationale

Gdal 2.X has been around for some time, and supporting both version is hard to maintain (see #1769 (closed)).

Modifications

The following modifications have been made :

  • Change the required version of GDAL from 1.10 to 2.0 in Modules/ThirdParty/GDAL/otb-module-init.cmake
  • tests on GDAL_VERSION_NUM for version prior to gdal 2.0 have been removed.
  • The namespace otb::ogr::version_proxy has been removed, in particular :
    • the functions GetAvailableDriversAsStringVector, GetFileListAsStringVector(GDALDataset * dataset) and IsFieldSetAndNotNull have been moved to the otb::ogr namespace in the file otbOGRHelpers.h. Note that IsFieldSetAndNotNull still depends on GDAL version (one implementation for GDAL<2.2 and one for GDAL >=2.2).
    • All other functions of the namespace have been deleted and replaced by the GDAL 2.X equivalent, for example version_proxy::Open(...) have been replaced by GDALOpenEx(...)
  • The CMake variable OTB_USE_GDAL_20 has been removed, as it is always true now.
  • The minimum version of GDAL has been modified in the software guide.

Additional notes

Please tell me if you think I missed something that can be removed in this MR !

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

Check before merging:

  • All discussions are resolved
  • At least 2 👍 votes from core developers, no 👎 vote.
  • The feature branch is (reasonably) up-to-date with the base branch
  • Dashboard is green
  • Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
Edited by Cédric Traizet

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