b278b60d51
Add stub definition of memory_order enum in wrapper.h. Creating Rust bindings from C code is done by passing the wrapper.h header to `bindgen`. This fails when library dependencies that use compiler headers are enabled, and the libclang that bindgen detects does not match the expected clang version. So far this has only been observed with the memory_order enum symbols from stdatomic.h. If we add the enum definition to wrapper.h ourselves, the error does not happen. Before this commit, if the mismatch happened the following error could come up: /usr/include/liburing/barrier.h:72:10: error: use of undeclared identifier 'memory_order_release' /usr/include/liburing/barrier.h:75:9: error: use of undeclared identifier 'memory_order_acquire' /usr/include/liburing/barrier.h:75:9: error: use of undeclared identifier 'memory_order_acquire' /usr/include/liburing/barrier.h:68:9: error: use of undeclared identifier 'memory_order_relaxed' /usr/include/liburing/barrier.h:65:17: error: use of undeclared identifier 'memory_order_relaxed' /usr/include/liburing/barrier.h:75:9: error: use of undeclared identifier 'memory_order_acquire' /usr/include/liburing/barrier.h:75:9: error: use of undeclared identifier 'memory_order_acquire' /usr/include/liburing/barrier.h:72:10: error: use of undeclared identifier 'memory_order_release' panicked at [..]/.cargo/registry/src/index.crates.io-6f17d22bba15001f/bindgen-cli-0.70.1/main.rs:45:36: Unable to generate bindings To fix this (on my system) I would have to export CLANG_PATH and LIBCLANG_PATH: export CLANG_PATH=/bin/clang-17 export LIBCLANG_PATH=/usr/lib/llvm-17/lib With these changes applied, bindgen is successful with both the environment variables set and unset. Since we're not using those symbols in the bindings (they are only used by dependencies) this does not affect the generated bindings in any way. Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org> Link: https://lore.kernel.org/r/20241027-rust-wrapper-stdatomic-v2-1-dab27bbf93ea@linaro.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
65 lines
2.2 KiB
C
65 lines
2.2 KiB
C
/*
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* QEMU System Emulator
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*
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* Copyright (c) 2024 Linaro Ltd.
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*
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* Authors: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* This header file is meant to be used as input to the `bindgen` application
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* in order to generate C FFI compatible Rust bindings.
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*/
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#ifndef __CLANG_STDATOMIC_H
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#define __CLANG_STDATOMIC_H
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/*
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* Fix potential missing stdatomic.h error in case bindgen does not insert the
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* correct libclang header paths on its own. We do not use stdatomic.h symbols
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* in QEMU code, so it's fine to declare dummy types instead.
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*/
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typedef enum memory_order {
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memory_order_relaxed,
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memory_order_consume,
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memory_order_acquire,
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memory_order_release,
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memory_order_acq_rel,
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memory_order_seq_cst,
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} memory_order;
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#endif /* __CLANG_STDATOMIC_H */
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#include "qemu/osdep.h"
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#include "qemu/module.h"
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#include "qemu-io.h"
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#include "sysemu/sysemu.h"
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#include "hw/sysbus.h"
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#include "exec/memory.h"
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#include "chardev/char-fe.h"
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#include "hw/clock.h"
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#include "hw/qdev-clock.h"
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#include "hw/qdev-properties.h"
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#include "hw/qdev-properties-system.h"
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#include "hw/irq.h"
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#include "qapi/error.h"
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#include "migration/vmstate.h"
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#include "chardev/char-serial.h"
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