Finally used the discovered paths from ./configure in scripts/crosstool-NG.sh:
- fix Makefile to really, really not used built-in rules and variables
- have scripts/crosstool-NG.sh generated from scripts/crosstool-NG.sh.in
- create a bin-overide directory ( in ${CT_WORK_DIR}/bin ) that contains shell wrappers to the actual discovered tools

/trunk/scripts/crosstool-NG.sh.in | 27 23 4 0 +++++++++++++++++++++---
/trunk/Makefile.in | 50 48 2 0 +++++++++++++++++++++++++++++++++++++++++++--
2 files changed, 71 insertions(+), 6 deletions(-)

# libelf config file

config TOOL_libelf

    help

      libelf lets you read, modify or create ELF files in an

      architecture-independent way.

choice

    bool

    prompt "libelf version"

config LIBELF_V_0_8_10

    bool

    prompt "0.8.10"

# CT_INSERT_VERSION_ABOVE

# Don't remove above line!

endchoice

config LIBELF_VERSION

    string

    default "0.8.10" if LIBELF_V_0_8_10

# CT_INSERT_VERSION_STRING_ABOVE

# Don't remove above line!