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

[Bei Guan <gbtju85@xxxxxxxxx>]

Hi,

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.


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

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