https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118194
vvinayag at arm dot com changed:
What |Removed |Added
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CC| |vvinayag at arm dot com
--- Comment #5 from vvinayag at arm dot com ---
(In reply to Sam James from comment #4)
> (In reply to Xi Ruoyao from comment #1)
> > I suppose Glibc should add __attribute__((access(1, none))) for mlock.
>
> commit 013106ae677af9836614ace1a01d25b63fa555a7 (HEAD -> master,
> origin/master, origin/HEAD)
> Author: Xi Ruoyao <xry...@xry111.site>
> Date: Thu Dec 26 12:51:18 2024 +0800
>
> mlock, mlock2, munlock: Tell the compiler we don't dereference the
> pointer
>
> Since https://gcc.gnu.org/r11-959, the compiler emits
> -Wmaybe-uninitialized if a const pointer to an uninitialized buffer is
> passed. Tell the compiler we don't dereference the pointer to remove
> the false alarm.
>
> Link: https://gcc.gnu.org/PR118194
> Signed-off-by: Xi Ruoyao <xry...@xry111.site>
> Reviewed-by: Sam James <s...@gentoo.org>
After this commit, there is a build failure :
../sysdeps/unix/sysv/linux/bits/mman-shared.h:60:5: error: attribute ‘access’
invalid mode ‘__none__’; expected one of ‘read_only’, ‘read_write’, or
‘write_only’
60 | __attr_access ((__none__, 1));
| ^~~~~~~~~~~~~
In file included from ../include/sys/mman.h:2,
from ../sysdeps/generic/ldsodefs.h:34,
from ../sysdeps/aarch64/ldsodefs.h:47,
from ../sysdeps/gnu/ldsodefs.h:46,
from ../sysdeps/unix/sysv/linux/ldsodefs.h:25,
from <stdin>:2:
../misc/sys/mman.h:104:5: error: attribute ‘access’ invalid mode ‘__none__’;
expected one of ‘read_only’, ‘read_write’, or ‘write_only’
104 | __attr_access ((__none__, 1));
| ^~~~~~~~~~~~~
../misc/sys/mman.h:108:5: error: attribute ‘access’ invalid mode ‘__none__’;
expected one of ‘read_only’, ‘read_write’, or ‘write_only’
108 | __attr_access ((__none__, 1));
| ^~~~~~~~~~~~~
I am trying to build for aarch64-none-linux-gnu target on an
aarch64-none-linux-gnu machine. The gcc version on the build machine is 7.5.0.
