[PATCH 2/2] virfile: Fix build with glibc 2.36
Cole Robinson
crobinso at redhat.com
Tue Aug 2 18:56:32 UTC 2022
On 8/2/22 3:12 AM, Erik Skultety wrote:
> On Mon, Aug 01, 2022 at 03:59:15PM -0400, Cole Robinson wrote:
>> With glibc 2.36, sys/mount.h and linux/mount.h conflict:
>> https://sourceware.org/glibc/wiki/Release/2.36#Usage_of_.3Clinux.2Fmount.h.3E_and_.3Csys.2Fmount.h.3E
>>
>> virfile.c imports sys/mount.h and linux/fs.h, which pulls in
>> linux/mount.h.
>>
>> Manually define the constants we need from linux/fs.h, like was
>> done in llvm:
>>
>> https://reviews.llvm.org/rGb379129c4beb3f26223288627a1291739f33af02
>>
>> Signed-off-by: Cole Robinson <crobinso at redhat.com>
>> ---
>> src/util/virfile.c | 4 +++-
>> 1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/src/util/virfile.c b/src/util/virfile.c
>> index 99da058db3..65d6d2a701 100644
>> --- a/src/util/virfile.c
>> +++ b/src/util/virfile.c
>> @@ -71,7 +71,9 @@
>> # endif
>> # include <sys/ioctl.h>
>> # include <linux/cdrom.h>
>> -# include <linux/fs.h>
>
> The commit message does explain the issue, but I'd still appreciate if there
> was a short commentary explaining this explicit constant definition here as
> well.
>
Done.
>> +# define FS_IOC_GETFLAGS _IOR('f', 1, long)
>> +# define FS_IOC_SETFLAGS _IOR('f', 2, long)
>
> ^this one has to be defined as FS_IOC_SETFLAGS _IOW('f', 2, long)
>
Darn, nice catch!
Here's the CI pipeline:
https://gitlab.com/crobinso/libvirt/-/pipelines/602982400
It passed, so I pushed with your suggested changes.
Thanks,
Cole
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