checking for -fno-toplevel-reorder... no
checking for -fstack-protector... no
checking whether cc puts quotes around section names... no
checking for assembler .weak directive... yes
checking whether CFI directives are supported... yes
checking for ld --no-whole-archive... yes
checking for gcc -fexceptions... yes
checking for __builtin_expect... yes
checking for __builtin_memset... no
checking for redirection of built-in functions... yes
checking for __thread... yes
checking for tls_model attribute... yes
checking for libgd... no
checking for egrep... grep -E
checking for ANSI C header files... no
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for long double... yes
checking size of long double... configure: error: cannot compute sizeof (long double), 77
See `config.log' for more details.

!!! ERROR: sys-libs/glibc-2.5-r4 failed.
Call stack:
  ebuild.sh, line 1621:   Called dyn_compile
  ebuild.sh, line 973:   Called qa_call 'src_compile'
  ebuild.sh, line 44:   Called src_compile
  glibc-2.5-r4.ebuild, line 1160:   Called src_compile
  glibc-2.5-r4.ebuild, line 1171:   Called toolchain-glibc_src_compile
  glibc-2.5-r4.ebuild, line 270:   Called glibc_do_configure 'nptl'
  glibc-2.5-r4.ebuild, line 944:   Called die

!!! failed to configure glibc
!!! If you need support, post the topmost build error, and the call stack if relevant.
!!! A complete build log is located at '/var/tmp/portage/sys-libs/glibc-2.5-r4/temp/build.log'.