Javier,
GDAL_USE_ICONV=ON // otherwise it does not compile in Ubuntu 20.04
Fixed per
https://github.com/OSGeo/gdal/commit/b183f2d9eb6c9dd7eefde194ced26d1913c06820
GDAL_USE_EXPAT=ON
GDAL_USE_TIFF=ON
GDAL_USE_GEOTIFF=ON
GDAL_USE_JPEG=ON
GDAL_USE_ZLIB=ON
As you can see, PNG is not enabled. Actually it says:
-- Disabled components:
...
*PNG component has been detected, but is disabled with GDAL_USE_PNG=OFF
Just a misleading notification message, due to the
GDAL_USE_PNG_INTERNAL=ON being probably set.
Fixed per
https://github.com/OSGeo/gdal/commit/339132cb09c4ba78ffa0b641f298184dcf4f7ab0
Even
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