[Rpm-maint] [rpm-software-management/rpm] The behavior of `%{?builtin_macro:foo}` is unclear from documentation (Issue #1866)

[Panu Matilainen]

No no, you really need to forget about using ? to perform additional logic. In >= 4.17 it only ever tests whether said macro is defined or not, so there's nothing further to explain wrt builtins. They are now just like any other macros in almost every way.

As I pointed out in #1669, conditional actions can be achieved via expressions in a far more generic way:

%[%{exists:/some/file}?"%{load:/some/file}":""]

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