[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1904259
Title:
include/qemu/atomic.h:495:5: error: misaligned atomic operation may
incur significant performance penalty (Clang 11; Ubuntu 16 i686)
Status in QEMU:
Expired
Status in Ubuntu:
Expired
Bug description:
Hello.
I haven't found any "official" executables, for emulating RISC-V (32bit;
64bit) so I had to compile those myself.
I found that auto-generated build scripts, for Ninja, contained some
warnings interpreted as errors:
oceanfish81@gollvm:~/Desktop/qemu/build$ ninja -j 1
[2/1977] Compiling C object libqemuutil.a.p/util_qsp.c.o
FAILED: libqemuutil.a.p/util_qsp.c.o
clang-11 -Ilibqemuutil.a.p -I. -I.. -Iqapi -Itrace -Iui -Iui/shader
-I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include
-I/usr/include/gio-unix-2.0/ -Xclang -fcolor-diagnostics -pipe -Wall
-Winvalid-pch -Werror -std=gnu99 -O2 -g -m32 -D_GNU_SOURCE
-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes
-Wredundant-decls -Wundef -Wwrite-strings -Wmissing-prototypes
-fno-strict-aliasing -fno-common -fwrapv -Wold-style-definition -Wtype-limits
-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body
-Wnested-externs -Wendif-labels -Wexpansion-to-defined
-Wno-initializer-overrides -Wno-missing-include-dirs -Wno-shift-negative-value
-Wno-string-plus-int -Wno-typedef-redefinition
-Wno-tautological-type-limit-compare -Wno-psabi -fstack-protector-strong
-isystem /home/oceanfish81/Desktop/qemu/linux-headers -isystem linux-headers
-iquote /home/oceanfish81/Desktop/qemu/tcg/i386 -iquote . -iquote
/home/oceanfish81/Desktop/qemu -iquote /home/oceanfish81/Desktop/qemu/accel/tcg
-iquote /home/oceanfish81/Desktop/qemu/include -iquote
/home/oceanfish81/Desktop/qemu/disas/libvixl -pthread -Wno-unused-function
-fPIC -MD -MQ libqemuutil.a.p/util_qsp.c.o -MF libqemuutil.a.p/util_qsp.c.o.d
-o libqemuutil.a.p/util_qsp.c.o -c ../util/qsp.c
In file included from ../util/qsp.c:62:
In file included from /home/oceanfish81/Desktop/qemu/include/qemu/thread.h:4:
In file included from
/home/oceanfish81/Desktop/qemu/include/qemu/processor.h:10:
/home/oceanfish81/Desktop/qemu/include/qemu/atomic.h:495:5: error: misaligned
atomic operation may incur significant performance penalty
[-Werror,-Watomic-alignment]
qatomic_set__nocheck(ptr, val);
^
/home/oceanfish81/Desktop/qemu/include/qemu/atomic.h:138:5: note: expanded
from macro 'qatomic_set__nocheck'
__atomic_store_n(ptr, i, __ATOMIC_RELAXED)
^
/home/oceanfish81/Desktop/qemu/include/qemu/atomic.h:485:12: error:
misaligned atomic operation may incur significant performance penalty
[-Werror,-Watomic-alignment]
return qatomic_read__nocheck(ptr);
^
/home/oceanfish81/Desktop/qemu/include/qemu/atomic.h:129:5: note: expanded
from macro 'qatomic_read__nocheck'
__atomic_load_n(ptr, __ATOMIC_RELAXED)
^
2 errors generated.
ninja: build stopped: subcommand failed.
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