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libqemuutil, qapi, trace: convert to meson

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This shows how to do some "computations" in meson.build using its array
and dictionary data structures, and also a basic usage of the sourceset
module for conditional compilation.

Notice the new "if have_system" part of util/meson.build, which fixes
a bug in the old build system was buggy: util/dbus.c was built even for
non-softmmu builds, but the dependency on -lgio was lost when the linking
was done through libqemuutil.a.  Because all of its users required gio
otherwise, the bug was hidden.  Meson instead propagates libqemuutil's
dependencies down to its users, and shows the problem.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-08-19 08:44:56 -04:00
parent 245dac4a1b
commit a81df1b68b
27 changed files with 597 additions and 525 deletions
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2
docs/devel/tracing.txt
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@ -60,7 +60,7 @@ general. It is strongly preferred that all events be declared directly in
the sub-directory that uses them. The only exception is where there are some
shared trace events defined in the top level directory trace-events file.
The top level directory generates trace files with a filename prefix of
"trace-root" instead of just "trace". This is to avoid ambiguity between
"trace/trace-root" instead of just "trace". This is to avoid ambiguity between
a trace.h in the current directory, vs the top level directory.
=== Using trace events ===