netCDF 4.9.2 with ENABLE_S3

[psharma-gdal]

I am trying to build netCDF with tag 4.9.2 using CMAKE . I wanted to enable the flag ENABLE_S3 but as soon i use i get below errors

 [exec]   Could not find a package configuration file provided by "AWSSDK" with any
 [exec]   of the following names:
 [exec] 
 [exec]     AWSSDKConfig.cmake
 [exec]     awssdk-config.cmake
 [exec] 
 [exec]   Add the installation prefix of "AWSSDK" to CMAKE_PREFIX_PATH or set
 [exec]   "AWSSDK_DIR" to a directory containing one of the above files.  If "AWSSDK"
 [exec]   provides a separate development package or SDK, be sure it has been
 [exec]   installed

Now i have got AWS CPP SDK built from source separately and i was hoping to use its include, lib and bin folders. But above error message seems like asking me to use its source?

I have below questions
a) What should i do to enable the S3 flag and use the pre-built AWS CPP SDK artifacts?
b) If (a) isn't possible then what should i do to build netCDF with S3 enabled? I want to use CMAKE based solution.
c) If the above flags have changed in recent versions, then also please share your views to build netCDF with S3 enabled.
Any suggestions?

[DennisHeimbigner]

The implest thing to do is try the internal s3 sdk first. You do this by using the option
NETCDF_ENABLE_S3_INTERNAL=on
(Note if that does not work then use ENABLE_S3_INTERNAL=on)
I haven't used the amazon aws-s3-cpp-sdk in a while, so I will check and make sure it works.

[psharma-gdal]

@DennisHeimbigner - The netCDF source which i have corresponds to version tag v4.9.2 and both the above flags i.e. NETCDF_ENABLE_S3_INTERNAL and ENABLE_S3_INTERNAL are no where to be found in entire repository source downloaded corresponding to tag v4.9.2
is it possible that these are added in recent versions?