I am trying to compile a Linux kernel for a Gumstix Overo Fire single board computer system, on an Ubuntu 11.04 system, but I keep getting an error. I am trying to follow the tutorial seen on http://www.gumstix.org/software-development/open-embedded/61-using-the-open-embedded-build-system.html, but I keep getting this output when running bitbake omap3-console-image:

NOTE: Handling BitBake files: / (7342/7342) [100 %]
Parsing of 7342 .bb files complete (6902 cached, 440 parsed). 7667 targets, 318 skipped, 2 masked, 0 errors.

Build Configuration:
BB_VERSION        = "1.10.2"
METADATA_BRANCH   = "overo"
METADATA_REVISION = "5f79a98"
TARGET_ARCH       = "arm"
TARGET_OS         = "linux-gnueabi"
MACHINE           = "overo"
DISTRO            = "angstrom"
DISTRO_VERSION    = "2010.7-test-20110706"
TARGET_FPU        = "hard"

NOTE: Resolving any missing task queue dependencies
NOTE: Preparing runqueue
NOTE: Executing runqueue
NOTE: Running task 51 of 5084 (ID: 2418, /home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb, do_compile)
NOTE: package perl-native-5.10.1-r10: task do_compile: Started
ERROR: TaskFailed event exception, aborting
ERROR: Build of /home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb do_compile failed
ERROR: Task 2418 (/home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb, do_compile) failed with 256
ERROR: '/home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb' failed
ERROR: Function do_compile failed
NOTE: Task failed: ('function do_compile failed', '/home/gravity9/overo-oe/tmp/work/x86_64-linux/perl-native-5.10.1-r10/temp/log.do_compile.2038')
ERROR: Logfile of failure stored in: /home/gravity9/overo-oe/tmp/work/x86_64-linux/perl-native-5.10.1-r10/temp/log.do_compile.2038
Log data follows:
| NOTE: make -e MAKEFLAGS=
| gcc -L/home/gravity9/overo-oe/tmp/sysroots/x86_64-linux/usr/lib -Wl,-rpath-link,/home/gravity9/overo-oe/tmp/sysroots/x86_64-linux/usr/lib -Wl,-rpath,/home/gravity9/overo-oe/tmp/sysroots/x86_64-linux/usr/lib -Wl,-O1 -fstack-protector -L/usr/local/lib -o miniperl \
|           gv.o toke.o perly.o pad.o regcomp.o dump.o util.o mg.o reentr.o mro.o hv.o av.o run.o pp_hot.o sv.o pp.o scope.o pp_ctl.o pp_sys.o doop.o doio.o regexec.o utf8.o taint.o deb.o universal.o xsutils.o globals.o perlio.o perlapi.o numeric.o mathoms.o locale.o pp_pack.o pp_sort.o  \
|         miniperlmain.o opmini.o perlmini.o
| util.o: In function `Perl_safesysmalloc':
| util.c:(.text+0x4d8): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_safesysrealloc':
| util.c:(.text+0x570): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_croak_nocontext':
| util.c:(.text+0x1946): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_safesyscalloc':
| util.c:(.text+0x19a0): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_die_nocontext':
| util.c:(.text+0x20d6): undefined reference to `pthread_getspecific'
| util.o:util.c:(.text+0x2216): more undefined references to `pthread_getspecific' follow
| util.o: In function `Perl_set_context':
| util.c:(.text+0x3ebe): undefined reference to `pthread_setspecific'
| util.o: In function `Perl_my_snprintf':
| util.c:(.text+0x6cc5): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_my_vsnprintf':
| util.c:(.text+0x6d90): undefined reference to `pthread_getspecific'
| util.o: In function `Perl_get_context':
| util.c:(.text+0x3ea7): undefined reference to `pthread_getspecific'
| mg.o: In function `Perl_csighandler':
| mg.c:(.text+0x234a): undefined reference to `pthread_getspecific'
| mg.o: In function `Perl_sighandler':
| mg.c:(.text+0x6030): undefined reference to `pthread_getspecific'
| reentr.o:reentr.c:(.text+0x3eb): more undefined references to `pthread_getspecific' follow
| sv.o: In function `perl_clone':
| sv.c:(.text+0xb802): undefined reference to `pthread_setspecific'
| sv.o: In function `Perl_sv_setpvf_mg_nocontext':
| sv.c:(.text+0x13665): undefined reference to `pthread_getspecific'
| sv.o: In function `Perl_sv_setpvf_nocontext':
| sv.c:(.text+0x13815): undefined reference to `pthread_getspecific'
| sv.o: In function `Perl_newSVpvf_nocontext':
| sv.c:(.text+0x13a06): undefined reference to `pthread_getspecific'
| sv.o: In function `Perl_sv_catpvf_mg_nocontext':
| sv.c:(.text+0x13be5): undefined reference to `pthread_getspecific'
| sv.o: In function `Perl_sv_catpvf_nocontext':
| sv.c:(.text+0x13fd5): undefined reference to `pthread_getspecific'
| pp.o: In function `Perl_pp_pow':
| pp.c:(.text+0x3390): undefined reference to `pow'
| pp.o: In function `Perl_pp_modulo':
| pp.c:(.text+0x4128): undefined reference to `floor'
| pp.c:(.text+0x415c): undefined reference to `floor'
| pp.c:(.text+0x4520): undefined reference to `fmod'
| pp.o: In function `Perl_pp_atan2':
| pp.c:(.text+0x9330): undefined reference to `atan2'
| pp.o: In function `Perl_pp_sin':
| pp.c:(.text+0x94e2): undefined reference to `sin'
| pp.o: In function `Perl_pp_int':
| pp.c:(.text+0x9a11): undefined reference to `floor'
| pp.c:(.text+0x9a31): undefined reference to `ceil'
| pp.o:(.rodata+0x220): undefined reference to `cos'
| pp.o:(.rodata+0x228): undefined reference to `sin'
| pp.o:(.rodata+0x230): undefined reference to `sin'
| pp.o:(.rodata+0x238): undefined reference to `exp'
| pp.o:(.rodata+0x240): undefined reference to `log'
| pp.o:(.rodata+0x248): undefined reference to `sqrt'
| perlio.o: In function `PerlIO_debug':
| perlio.c:(.text+0x774): undefined reference to `pthread_getspecific'
| perlio.c:(.text+0x82f): undefined reference to `pthread_getspecific'
| perlio.o: In function `PerlIOUnix_refcnt_dec':
| perlio.c:(.text+0x4b4f): undefined reference to `pthread_getspecific'
| perlio.o: In function `PerlIO_releaseFILE':
| perlio.c:(.text+0x4f72): undefined reference to `pthread_getspecific'
| perlio.o: In function `PerlIO_getname':
| perlio.c:(.text+0x559b): undefined reference to `pthread_getspecific'
| perlio.o:perlio.c:(.text+0x55bf): more undefined references to `pthread_getspecific' follow
| pp_pack.o: In function `S_pack_rec':
| pp_pack.c:(.text+0x6fd8): undefined reference to `floor'
| pp_pack.c:(.text+0x6ff3): undefined reference to `floor'
| pp_pack.c:(.text+0x7028): undefined reference to `floor'
| opmini.o: In function `Perl_load_module_nocontext':
| opmini.c:(.text+0xeccf): undefined reference to `pthread_getspecific'
| perlmini.o: In function `perl_alloc':
| perlmini.c:(.text+0x432): undefined reference to `pthread_setspecific'
| perlmini.c:(.text+0x45f): undefined reference to `pthread_key_create'
| perlmini.c:(.text+0x475): undefined reference to `pthread_setspecific'
| perlmini.o: In function `perl_fini':
| perlmini.c:(.text+0x587): undefined reference to `pthread_key_delete'
| collect2: ld returned 1 exit status
| make: *** [miniperl] Error 1
| FATAL: oe_runmake failed
| ERROR: Function do_compile failed
NOTE: package perl-native-5.10.1-r10: task do_compile: Failed
ERROR: TaskFailed event exception, aborting
ERROR: Build of /home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb do_compile failed
ERROR: Task 2418 (/home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb, do_compile) failed with 256
ERROR: '/home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb' failed
ERROR: '/home/gravity9/overo-oe/org.openembedded.dev/recipes/perl/perl-native_5.10.1.bb' failed

Any help as to what the problem might be would be greatly appreciated. And thank you in advance for your time.