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meson: remove CONFIG_ALL

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CONFIG_ALL is tricky to use and was ported over to Meson from the
recursive processing of Makefile variables.  Meson sourcesets
however have all_sources() and all_dependencies() methods that
remove the need for it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-08-31 11:18:24 +02:00
parent 1220f5813a
commit 0d66549cf5
14 changed files with 7 additions and 65 deletions
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15
docs/devel/build-system.rst
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@ -256,21 +256,6 @@ Target-independent emulator sourcesets:
``system_ss`` only in system emulators, ``user_ss`` only in user-mode
emulators.
Target-independent sourcesets must exercise particular care when using
``if_false`` rules. The ``if_false`` rule will be used correctly when linking
emulator binaries; however, when *compiling* target-independent files
into .o files, Meson may need to pick *both* the ``if_true`` and
``if_false`` sides to cater for targets that want either side. To
achieve that, you can add a special rule using the ``CONFIG_ALL``
symbol::
# Some targets have CONFIG_ACPI, some don't, so this is not enough
system_ss.add(when: 'CONFIG_ACPI', if_true: files('acpi.c'),
if_false: files('acpi-stub.c'))
# This is required as well:
system_ss.add(when: 'CONFIG_ALL', if_true: files('acpi-stub.c'))
Target-dependent emulator sourcesets:
In the target-dependent set lives CPU emulation, some device emulation and
much glue code. This sometimes also has to be compiled multiple times,