CT_EXPERIMENTAL=y CT_LOCAL_TARBALLS_DIR="${HOME}/src" CT_SAVE_TARBALLS=y CT_LOG_EXTRA=y CT_ARCH_s390=y CT_KERNEL_linux=y CT_KERNEL_V_2_6_31_14=y CT_BINUTILS_V_2_20_1a=y CT_CC_V_4_3_4=y CT_CC_LANG_CXX=y CT_LIBC_glibc=y CT_LIBC_GLIBC_V_2_9=y CT_GMP_V_4_3_2=y CT_MPFR_V_2_4_2=y