Re: [Xen-devel] Errors of doing "make install-tools" with xen-4.2-unstable?

[Bei Guan <gbtju85@xxxxxxxxx>]

2012/5/11 Ian Campbell <Ian.Campbell@xxxxxxxxxx>

On Fri, 2012-05-11 at 15:08 +0100, Bei Guan wrote:
> When I do the "make install-tools" with xen-4.2-unstable, there are
> some errors about "warn_unused_result".
> Is it the error in code or the error in the compiling environment?
> Thank you so much.

This commit
       changeset:   25275:27d63b9f111a
       user:        Keir Fraser <keir@xxxxxxx>
       date:        Thu May 10 11:22:18 2012 +0100
       summary:     blktap2: Do not build with -O0
has caused more warnings to be generated by the compiler, which in turn
leads to build failures. Since this is a compiler specific thing we are
still tracking them all down.

Can you confirm which versionof xen-unstable.hg you are using -- there
have been several fixup patches since the above. If you are completely
up to date and you still see errors we can dig into whatever is left.

Thank you for your reply. I have used "hg pull; hg update" to update to the latest Xen and it is the version info:

root@gavin-desktop:~/Xen/xen-4.2-unstable# hg tip
changeset:   25287:54c8c9eaee92
tag:         tip
user:        Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
date:        Fri Apr 27 11:09:26 2012 +0200
summary:     docs: add vpmu description to xen-command-line.markdown

But, it still has the same errors.


Thanks,
Bei Guan

 

Ian. (starting to think that this change wasn't suitable during a
feature freeze....)

>
>
> gcc  -O1 -fno-omit-frame-pointer -m64 -g -fno-strict-aliasing
> -std=gnu99 -Wall -Wstrict-prototypes -Wdeclaration-after-statement
> -D__XEN_TOOLS__ -MMD -MF .tapdisk-queue.o.d  -D_LARGEFILE_SOURCE
> -D_LARGEFILE64_SOURCE -fno-optimize-sibling-calls -Werror -g
> -Wno-unused -fno-strict-aliasing -I../include -I../drivers
> -I/root/Xen/xen-4.2-unstable/tools/blktap2/drivers/../../../tools/libxc -I/root/Xen/xen-4.2-unstable/tools/blktap2/drivers/../../../tools/include -D_GNU_SOURCE -DUSE_NFS_LOCKS -fPIC -I /root/Xen/xen-4.2-unstable/tools/blktap2/drivers/../../../tools/libaio/src  -c -o tapdisk-queue.o tapdisk-queue.c
> cc1: warnings being treated as errors
> tapdisk-queue.c: In function ‘tapdisk_lio_ack_event’:
> tapdisk-queue.c:438: error: ignoring return value of ‘read’, declared
> with attribute warn_unused_result
> make[5]: *** [tapdisk-queue.o] Error 1
> make[5]: Leaving directory
> `/root/Xen/xen-4.2-unstable/tools/blktap2/drivers'
> make[4]: *** [subdir-install-drivers] Error 2
> make[4]: Leaving directory `/root/Xen/xen-4.2-unstable/tools/blktap2'
> make[3]: *** [subdirs-install] Error 2
> make[3]: Leaving directory `/root/Xen/xen-4.2-unstable/tools/blktap2'
> make[2]: *** [subdir-install-blktap2] Error 2
> make[2]: Leaving directory `/root/Xen/xen-4.2-unstable/tools'
> make[1]: *** [subdirs-install] Error 2
> make[1]: Leaving directory `/root/Xen/xen-4.2-unstable/tools'
> make: *** [install-tools] Error 2
> ------
> root/Xen/xen-4.2-unstable/tools/blktap2/drivers/../../../tools/libaio/src  -c -o tapdisk-log.o tapdisk-log.c
> cc1: warnings being treated as errors
> tapdisk-log.c: In function ‘tlog_flush’:
> tapdisk-log.c:250: error: ignoring return value of ‘write’, declared
> with attribute warn_unused_result
> ------
> /root/Xen/xen-4.2-unstable/tools/blktap2/drivers/../../../tools/libaio/src  -c -o tapdisk2.o tapdisk2.c
> cc1: warnings being treated as errors
> tapdisk2.c: In function ‘main’:
> tapdisk2.c:82: error: ignoring return value of ‘chdir’, declared with
> attribute warn_unused_result
> ------
> cc1: warnings being treated as errors
> tapdisk-stream.c: In function ‘tapdisk_stream_poll_clear’:
> tapdisk-stream.c:148: error: ignoring return value of ‘read’, declared
> with attribute warn_unused_result
> tapdisk-stream.c: In function ‘tapdisk_stream_poll_set’:
> tapdisk-stream.c:158: error: ignoring return value of ‘write’,
> declared with attribute warn_unused_result
> tapdisk-stream.c: In function ‘tapdisk_stream_print_request’:
> tapdisk-stream.c:206: error: ignoring return value of ‘write’,
> declared with attribute warn_unused_result
>
>
>
> Best Regards,
> Bei Guan
>

-- 
Best Regards,

Bei Guan

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