Use O2LongInt aliased to long int instead of int64_t in persistent ob…

[shahor02]

…jects with pair<...>

This is to make readable on the MacOS the CCDB objects with pairstd::int64_t,... (stored as pair<long int, ...>). A static_assert is added to ensure that the long int is at least 8 bytes long.

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[shahor02]

Hi @chiarazampolli
Could you please check if with this PR you can read on MacOC objects like

http://alice-ccdb.cern.ch/browse/FV0/Calib/DCSDPs
https://alice-ccdb.cern.ch/browse/MFT/Condition/DCSDPs
or
https://alice-ccdb.cern.ch/browse/GLO/Config/EnvVars ?

[chiarazampolli]

Hi @shahor02 ,

Thanks for taking care. I need to recompile quite an old O2 version, I will let you know when I manage.

Chiara

[chiarazampolli]

Hello @shahor02 ,

For me now it works on macos:

{code}
root [0]
Attaching file o2-grp-GRPEnvVariables_1734616480932.root as _file0...
(TFile ) 0x154140c70
root [1] .ls
TFile* o2-grp-GRPEnvVariables_1734616480932.root
TFile* o2-grp-GRPEnvVariables_1734616480932.root
KEY: o2::grp::GRPEnvVariables ccdb_object;1 object title
root [2] o2::grp::GRPEnvVariables* cc = (o2::grp::GRPEnvVariables*)_file0->Get("ccdb_object")
(o2::grp::GRPEnvVariables *) 0x600002d1d8c0
root [3] cc->print()
CavernTemperature
timestamp 1734615883019 val 18.060
SurfaceAtmosPressure
timestamp 1734615879030 val 955.205
CavernAtmosPressure
timestamp 1734615880519 val 958.999
CavernAtmosPressure2
timestamp 1734615880519 val 958.830
root [4]
{code}

[shahor02]

Thanks for checking, merging.