glibc

не собирается glibc, хотя та же версия уже собиралась и без проблем.
Пишет:
gcc ../sysdeps/ieee754/dbl-64/s_isinf.c -c -std=gnu99 -O2 -Wall -Winline -Wstrict-prototypes -Wwrite-strings -march=k8 -pipe -mpreferred-stack-boundary=4 -fPIC -Wno-uninitialized -D__NO_MATH_INLINES -D__LIBC_INTERNAL_MATH_INLINES -I../include -I. -I/var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthread s/math -I.. -I../libio -I/var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthread s -I../sysdeps/i386/elf -I../linuxthreads/sysdeps/unix/sysv/linux/i386 -I../linuxthreads/sysdeps/unix/sysv/linux -I../linuxthreads/sysdeps/pthread -I../sysdeps/pthread -I../linuxthreads/sysdeps/unix/sysv -I../linuxthreads/sysdeps/unix -I../linuxthreads/sysdeps/i386/i686 -I../linuxthreads/sysdeps/i386 -I../libidn/sysdeps/unix -I../sysdeps/unix/sysv/linux/i386 -I../sysdeps/unix/sysv/linux -I../sysdeps/gnu -I../sysdeps/unix/common -I../sysdeps/unix/mman -I../sysdeps/unix/inet -I../sysdeps/unix/sysv/i386 -I../sysdeps/unix/sysv -I../sysdeps/unix/i386 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/i386/i686/fpu -I../sysdeps/i386/i686 -I../sysdeps/i386/i486 -I../sysdeps/i386/fpu -I../sysdeps/i386 -I../sysdeps/wordsize-32 -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/ieee754 -I../sysdeps/generic/elf -I../sysdeps/generic -nostdinc -isystem /usr/lib/gcc/x86_64-pc-linux-gnu/4.0.2/include -isystem //usr/include -D_LIBC_REENTRANT -include ../include/libc-symbols.h -DPIC -DSHARED -o /var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthreads/ math/s_isinf.os -MD -MP -MF /var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthreads/ math/s_isinf.os.dt -MT /var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthreads/ math/s_isinf.os
../sysdeps/ieee754/dbl-64/s_isinf.c:29: error: 'isinf' aliased to undefined symbol '__isinf'
make[2]: *** [/var/tmp/portage/glibc-2.3.5-r1/work/build-x86-x86_64-pc-linux-gnu-linuxthreads /math/s_isinf.os] Error 1
make[2]: Leaving directory `/var/tmp/portage/glibc-2.3.5-r1/work/glibc-2.3.5/math'
make[1]: *** [math/subdir_lib] Error 2
make[1]: Leaving directory `/var/tmp/portage/glibc-2.3.5-r1/work/glibc-2.3.5'
make: *** [all] Error 2

!!! ERROR: sys-libs/glibc-2.3.5-r1 failed.
!!! Function toolchain-glibc_src_compile, Line 230, Exitcode 2
!!! (no error message)
!!! If you need support, post the topmost build error, NOT this status message.
Данное сообщение выводится при любом компиляторе.
В чем может быть проблема?