Re: [PATCH 5/6] qapi: apply schema prefix to QAPI feature enum constants

["Daniel P. Berrangé" <berrange@redhat.com>]

On Mon, Aug 05, 2024 at 03:11:12PM +0200, Markus Armbruster wrote:
> Daniel P. Berrangé <berrange@redhat.com> writes:
> 
> > On Mon, Aug 05, 2024 at 02:22:47PM +0200, Markus Armbruster wrote:
> >> Daniel P. Berrangé <berrange@redhat.com> writes:
> >> 
> >> > This allows us to include multiple QAPI schemas in the same file.
> >> >
> >> > Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
> >> 
> >> I figure you had reason to simultaneously include headers generated for
> >> multiple schemas.  Do tell :)
> >
> > I didn't want to have this patch, but the unit tests do this :-(
> >
> > [2/37] Compiling C object tests/libtestqapi.a.p/meson-generated_.._test-qapi-commands-sub-sub-module.c.o
> > FAILED: tests/libtestqapi.a.p/meson-generated_.._test-qapi-commands-sub-sub-module.c.o 
> > cc -m64 -Itests/libtestqapi.a.p -Itests -I../tests -I. -Iqapi -Itrace -Iui -Iui/shader -Itests/include -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/sysprof-6 -fdiagnostics-color=auto -Wall -Winvalid-pch -Werror -std=gnu11 -O2 -g -fstack-protector-strong -Wempty-body -Wendif-labels -Wexpansion-to-defined -Wformat-security -Wformat-y2k -Wignored-qualifiers -Wimplicit-fallthrough=2 -Winit-self -Wmissing-format-attribute -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls -Wshadow=local -Wstrict-prototypes -Wtype-limits -Wundef -Wvla -Wwrite-strings -Wno-missing-include-dirs -Wno-psabi -Wno-shift-negative-value -isystem /var/home/berrange/src/virt/qemu/linux-headers -isystem linux-headers -iquote . -iquote /var/home/berrange/src/virt/qemu -iquote /var/home/berrange/src/virt/qemu/include -iquote /var/home/berrange/src/virt/qemu/host/include/x86_64 -iquote /var/home/berrange/src/virt/qemu/host/include/generic -iquote /var/home/berrange/src/virt/qemu/tcg/i386 -pthread -msse2 -mcx16 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -fno-strict-aliasing -fno-common -fwrapv -ftrivial-auto-var-init=zero -fzero-call-used-regs=used-gpr -fPIE -MD -MQ tests/libtestqapi.a.p/meson-generated_.._test-qapi-commands-sub-sub-module.c.o -MF tests/libtestqapi.a.p/meson-generated_.._test-qapi-commands-sub-sub-module.c.o.d -o tests/libtestqapi.a.p/meson-generated_.._test-qapi-commands-sub-sub-module.c.o -c tests/test-qapi-commands-sub-sub-module.c
> > In file included from tests/test-qapi-types-sub-sub-module.h:17,
> >                  from tests/test-qapi-visit-sub-sub-module.h:17,
> >                  from tests/test-qapi-commands-sub-sub-module.c:19:
> > tests/test-qapi-features.h:16:5: error: redeclaration of enumerator ‘QAPI_FEATURE_DEPRECATED’
> >    16 |     QAPI_FEATURE_DEPRECATED,
> >       |     ^~~~~~~~~~~~~~~~~~~~~~~
> > In file included from ./qapi/qapi-types-error.h:17,
> >                  from /var/home/berrange/src/virt/qemu/include/qapi/error.h:275,
> >                  from /var/home/berrange/src/virt/qemu/include/qapi/compat-policy.h:16,
> >                  from tests/test-qapi-commands-sub-sub-module.c:14:
> > ./qapi/qapi-features.h:16:5: note: previous definition of ‘QAPI_FEATURE_DEPRECATED’ with type ‘enum <anonymous>’
> >    16 |     QAPI_FEATURE_DEPRECATED,
> >       |     ^~~~~~~~~~~~~~~~~~~~~~~
> > ninja: build stopped: subcommand failed.
> > make[1]: *** [Makefile:167: run-ninja] Error 1
> > make[1]: Leaving directory '/var/home/berrange/src/virt/qemu/build'
> > make: *** [GNUmakefile:6: build] Error 2
> 
> Compiles for me with PATCH 5/6 taken out.  What am I doing wrong?

The bit in patch 6 which generates the enum still has the prefix:

+        self._genh.add("typedef enum {\n")
+        for name in features:
+            self._genh.add(f"    {c_enum_const(self._prefix + 'QAPI_FEATURE', name)},\n")
+
+        self._genh.add("} " + c_name(self._prefix + 'QapiFeature') + ";\n")


> 
> > I would be nice to eliminate that, but some parts of the test appear
> > to pull in more of the system emulator code which forces in the main
> > qapi schema
> >
> > n file included from ./qapi/qapi-types-block-core.h:17,
> >                  from /var/home/berrange/src/virt/qemu/include/block/block-common.h:27,
> >                  from /var/home/berrange/src/virt/qemu/include/block/block-global-state.h:27,
> >                  from /var/home/berrange/src/virt/qemu/include/block/block.h:27,
> >                  from /var/home/berrange/src/virt/qemu/include/monitor/monitor.h:4,
> >                  from /var/home/berrange/src/virt/qemu/include/qapi/qmp/dispatch.h:17,
> >                  from tests/test-qapi-init-commands.h:16,
> >                  from tests/test-qapi-init-commands.c:15:
> > ./qapi/qapi-features.h:16:5: error: redeclaration of enumerator ‘QAPI_FEATURE_DEPRECATED’
> >    16 |     QAPI_FEATURE_DEPRECATED,
> >       |     ^~~~~~~~~~~~~~~~~~~~~~~
> > In file included from tests/include/../test-qapi-types-sub-sub-module.h:17,
> >                  from tests/include/../test-qapi-commands-sub-sub-module.h:16,
> >                  from tests/include/test-qapi-commands-sub-module.h:16,
> >                  from tests/test-qapi-commands.h:16,
> >                  from tests/test-qapi-init-commands.c:14:
> > tests/include/../test-qapi-features.h:16:5: note: previous definition of ‘QAPI_FEATURE_DEPRECATED’ with type ‘enum <anonymous>’
> >    16 |     QAPI_FEATURE_DEPRECATED,
> >       |     ^~~~~~~~~~~~~~~~~~~~~~~
> > tests/test-qapi-init-commands.c: In function ‘test_qmp_init_marshal’:
> > tests/test-qapi-init-commands.c:64:71: error: ‘TEST_QAPI_FEATURE_DEPRECATED’ undeclared (first use in this function); did you mean ‘QAPI_FEATURE_DEPRECATED’?
> >    64 |                          qmp_marshal_test_command_features1, 0, 1u << TEST_QAPI_FEATURE_DEPRECATED);
> >       |                                                                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >       |                                                                       QAPI_FEATURE_DEPRECATED
> > tests/test-qapi-init-commands.c:64:71: note: each undeclared identifier is reported only once for each function it appears in
> >
> >
> > Maybe the test needs to be split into two ?  One test exclusively testing
> > with the tests/qapi-schema/qapi-schema-test.json, and one test exclusively
> > with the main QMP QAPI schema ?
> 
> Which test is it?

I'm unclear which is using this - its just failing with plain 'make' for
me.

With regards,
Daniel
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