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(-)

 Original patch from Gentoo:

 gentoo/src/patchsets/binutils/2.19/78_all_use-relro.patch

 diff -durN binutils-2.19.orig/ld/ldmain.c binutils-2.19/ld/ldmain.c

 --- binutils-2.19.orig/ld/ldmain.c	2008-11-23 16:59:24.000000000 +0100

 +++ binutils-2.19/ld/ldmain.c	2008-11-23 16:59:45.000000000 +0100

 @@ -264,6 +264,7 @@

    link_info.keep_memory = TRUE;

    link_info.new_dtags = TRUE;

    link_info.combreloc = TRUE;

 +  link_info.relro = TRUE;

    link_info.strip_discarded = TRUE;

    link_info.emit_hash = TRUE;

  #ifndef __mips__