These are the packages that would be merged, in order:

Calculating dependencies  ... done!
[ebuild  N    ] dev-perl/IO-AIO-3.3.1  0 kB

Total: 1 package (1 new), Size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] 
>>> Verifying ebuild manifests

>>> Emerging (1 of 1) dev-perl/IO-AIO-3.3.1
 * IO-AIO-3.31.tar.gz RMD160 SHA1 SHA256 size ;-) ...                    [ ok ]
 * checking ebuild checksums ;-) ...                                     [ ok ]
 * checking auxfile checksums ;-) ...                                    [ ok ]
 * checking miscfile checksums ;-) ...                                   [ ok ]
 * CPV:  dev-perl/IO-AIO-3.3.1
 * REPO: gentoo
 * USE:  amd64 elibc_glibc kernel_linux multilib test userland_GNU
>>> Unpacking source...
>>> Unpacking IO-AIO-3.31.tar.gz to /var/tmp/portage/dev-perl/IO-AIO-3.3.1/work
>>> Source unpacked in /var/tmp/portage/dev-perl/IO-AIO-3.3.1/work
>>> Compiling source in /var/tmp/portage/dev-perl/IO-AIO-3.3.1/work/IO-AIO-3.31 ...
 * Using ExtUtils::MakeMaker
checking for gcc... x86_64-pc-linux-gnu-gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether x86_64-pc-linux-gnu-gcc accepts -g... yes
checking for x86_64-pc-linux-gnu-gcc option to accept ISO C89... none needed
checking for library containing pthread_create... -lpthread
checking for futimes... yes
checking for readahead... yes
checking for fdatasync... yes
checking for pread and pwrite... yes
checking for sendfile... yes
checking for sync_file_range... no
configure: creating ./config.status
config.status: creating libeio/config.h
Checking if your kit is complete...
Looks good
Writing Makefile for IO::AIO
make OTHERLDFLAGS= 
cp AIO.pm blib/lib/IO/AIO.pm
/usr/bin/perl5.8.8 /usr/lib64/perl5/5.8.8/ExtUtils/xsubpp  -typemap /usr/lib64/perl5/5.8.8/ExtUtils/typemap -typemap typemap  AIO.xs > AIO.xsc && mv AIO.xsc AIO.c
x86_64-pc-linux-gnu-gcc -c   -fno-strict-aliasing -pipe -Wdeclaration-after-statement -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm -O2 -pipe -march=native -Wall   -DVERSION=\"3.31\" -DXS_VERSION=\"3.31\" -fPIC "-I/usr/lib64/perl5/5.8.8/x86_64-linux/CORE"   AIO.c
In file included from AIO.xs:9:
schmorp.h: In function ‘s_epipe_signal’:
schmorp.h:414: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result
schmorp.h: In function ‘s_epipe_drain’:
schmorp.h:427: warning: ignoring return value of ‘read’, declared with attribute warn_unused_result
In file included from AIO.xs:154:
libeio/eio.c: In function ‘etp_start_thread’:
libeio/eio.c:440: warning: left-hand operand of comma expression has no effect
libeio/eio.c: In function ‘eio__scandir’:
libeio/eio.c:1203: warning: suggest explicit braces to avoid ambiguous ‘else’
libeio/eio.c: In function ‘eio__mtouch’:
libeio/eio.c:1378: warning: suggest explicit braces to avoid ambiguous ‘else’
libeio/eio.c: In function ‘eio_grp_add’:
libeio/eio.c:1863: warning: left-hand operand of comma expression has no effect
AIO.xs: In function ‘req_cancel_subs’:
AIO.xs:434: warning: unused variable ‘sub’
AIO.xs: In function ‘XS_IO__AIO_aio_fsync’:
AIO.xs:653: warning: statement with no effect
AIO.xs: In function ‘XS_IO__AIO_aio_sync_file_range’:
AIO.xs:671: warning: statement with no effect
AIO.xs: In function ‘XS_IO__AIO_aio_close’:
AIO.xs:700: warning: statement with no effect
AIO.xs: In function ‘XS_IO__AIO_aio_read’:
AIO.xs:731: warning: value computed is not used
AIO.xs: In function ‘XS_IO__AIO_aio_readlink’:
AIO.xs:762: warning: unused variable ‘data’
AIO.c: In function ‘XS_IO__AIO_poll_cb’:
AIO.c:1609: warning: unused variable ‘items’
AIO.c: In function ‘XS_IO__AIO_sendfile’:
AIO.c:1742: warning: unused variable ‘RETVAL’
AIO.c: At top level:
/usr/lib64/perl5/5.8.8/x86_64-linux/CORE/patchlevel.h:122: warning: ‘local_patches’ defined but not used
schmorp.h:109: warning: ‘s_signum_croak’ defined but not used
schmorp.h:190: warning: ‘s_gensub’ defined but not used
schmorp.h:386: warning: ‘s_epipe_destroy’ defined but not used
AIO.xs:166: warning: ‘req_cancel’ declared ‘static’ but never defined
Running Mkbootstrap for IO::AIO ()
chmod 644 AIO.bs
rm -f blib/arch/auto/IO/AIO/AIO.so
x86_64-pc-linux-gnu-gcc -O2 -pipe -march=native -Wall  -shared -L/usr/local/lib64 AIO.o  -o blib/arch/auto/IO/AIO/AIO.so 	\
	   -lpthread  	\
	  
chmod 755 blib/arch/auto/IO/AIO/AIO.so
cp AIO.bs blib/arch/auto/IO/AIO/AIO.bs
chmod 644 blib/arch/auto/IO/AIO/AIO.bs
cp bin/treescan blib/script/treescan
/usr/bin/perl5.8.8 "-MExtUtils::MY" -e "MY->fixin(shift)" blib/script/treescan
>>> Source compiled.
make test TEST_VERBOSE=1 
PERL_DL_NONLAZY=1 /usr/bin/perl5.8.8 "-MExtUtils::Command::MM" "-e" "test_harness(1, 'blib/lib', 'blib/arch')" t/*.t
t/00_load.......1..3
ok 1
ok 2
ok 3
ok
t/01_stat.......1..10
dubious
	Test returned status 0 (wstat 11, 0xb)
DIED. FAILED tests 1-10
	Failed 10/10 tests, 0.00% okay
t/02_read.......1..2
dubious
	Test returned status 0 (wstat 11, 0xb)
DIED. FAILED tests 1-2
	Failed 2/2 tests, 0.00% okay
t/03_errors.....1..12
# Running under perl version 5.008008 for linux
# Current time local: Wed Dec  2 12:02:23 2009
# Current time GMT:   Wed Dec  2 12:02:23 2009
# Using Test.pm version 1.25
dubious
	Test returned status 0 (wstat 11, 0xb)
DIED. FAILED tests 1-12
	Failed 12/12 tests, 0.00% okay
t/04_fork.......1..9
# Running under perl version 5.008008 for linux
# Current time local: Wed Dec  2 12:02:23 2009
# Current time GMT:   Wed Dec  2 12:02:23 2009
# Using Test.pm version 1.25
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok
t/05_readdir....1..12
# Running under perl version 5.008008 for linux
# Current time local: Wed Dec  2 12:02:23 2009
# Current time GMT:   Wed Dec  2 12:02:23 2009
# Using Test.pm version 1.25
ok 1
dubious
	Test returned status 0 (wstat 11, 0xb)
DIED. FAILED tests 2-12
	Failed 11/12 tests, 8.33% okay
t/06_group......1..12
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
ok 8
ok 9
ok 10
ok 11
ok 12
ok
t/07_feeder.....1..6
ok 1
ok 2 # 5 == 5
ok 3 # 0 == 0
ok 4
ok 5 # 10 == 10
ok 6 # 10 == 10
ok
Failed Test    Stat Wstat Total Fail  Failed  List of Failed
-------------------------------------------------------------------------------
t/01_stat.t       0    11    10   20 200.00%  1-10
t/02_read.t       0    11     2    4 200.00%  1-2
t/03_errors.t     0    11    12   24 200.00%  1-12
t/05_readdir.t    0    11    12   22 183.33%  2-12
Failed 4/8 test scripts, 50.00% okay. 35/66 subtests failed, 46.97% okay.
make: *** [test_dynamic] Error 255
 * ERROR: dev-perl/IO-AIO-3.3.1 failed:
 *   test failed
 * 
 * Call stack:
 *     ebuild.sh, line   49:  Called src_test
 *   environment, line 2949:  Called perl-module_src_test
 *   environment, line 2726:  Called die
 * The specific snippet of code:
 *                   emake test TEST_VERBOSE=${TEST_VERBOSE:-0} || die "test failed";
 * 
 * If you need support, post the output of 'emerge --info =dev-perl/IO-AIO-3.3.1',
 * the complete build log and the output of 'emerge -pqv =dev-perl/IO-AIO-3.3.1'.
 * The complete build log is located at '/var/tmp/portage/dev-perl/IO-AIO-3.3.1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-perl/IO-AIO-3.3.1/temp/environment'.
 * S: '/var/tmp/portage/dev-perl/IO-AIO-3.3.1/work/IO-AIO-3.31'

>>> Failed to emerge dev-perl/IO-AIO-3.3.1, Log file:

>>>  '/var/tmp/portage/dev-perl/IO-AIO-3.3.1/temp/build.log'