Define a macro if it is not defined

[vhaispdeaded]

I need help understanding the syntax of defining a macro if it is not defined, as described at Macro syntax

%{!?with_python3: %global with_python3 1}

I am trying to build the following macro:

%global _TSCOVersion %{!?major:%global major 22}.%{!?minor:%global minor 4}.%{!?servicepack:%global servicepack 00}

I expect it to expand to: 22.4.00
but it expands to: ..

Am I misunderstanding the syntax?

I am using RPM 4.14.3 on Red Hat Enterprise Linux 8.7.

Thank you,

[pmatilai]

%global itself expands to empty, not the defined value. Eg.

[pmatilai🎩︎localhost ~]$ rpm --eval "%global major 22"

[pmatilai🎩︎localhost ~]$ rpm --eval "%global major 22" --eval "%{major}"

22