This is a private allocator that can be used for large groups of
allocations that are tied to a specific object.
For example, the callgraph owning many nodes can use this so all the nodes
are allocated together, but also freed in a single stage ignoring all the
complex GList linked nodes among them.
This simplifies deployment on embedded devices, where polkit is usually
unncessary at runtime, but pulls in quite a few otherwise unncessary
dependencies. Start to improve the situation by allowing to selectively
disable polkit-agent support at compile time, which aids in container
usage scenarios, where one wants to invoke 'sysprof-cli' from within
the container. Bypassing polkit-agent in the container is then desired,
since the host sysprofd will handle asking for permissions to enable
the tracing. It allows for a simpler setup of rootless podman
containers, avoiding UID mismatches, that lead to rejection of the
tracing enablement.
- Add a new 'polkit-agent' meson build feature, that allows to force disabling
polkit-agent support (-Dpolkit-agent=disabled).
- Mark the 'polkit-agent' feature as enabled, by default, to reflect
the current status (sysprof-cli did not build without polkit-agent support).
- libsysprof/sysprof-instrument.c: Build fix when polkit is not available,
remove the unnecessary 'g_autopr(PolkitDetails) details' variable.
- Alter the sysprof-cli dependencies to only attempt to link against
polkit-agent, if necessary. Modify sysprof-cli.c to wrap all code using
polkit-agent in HAVE_POLKIT_AGENT blocks.
