Further enhance the check for needed tools:
- update the tool_pattern to use ' || ' as a pattern separator
- which allows using | in regexp
- add checks for cut and xargs
- manually check for grep and sed because they are needed when checking for tools
- print why a test failed, with each tested tool and regexp
- move tools checks before options parsing
- apply conttibutions before computing the version string
- inform user to run make && make install

/trunk/configure | 173 111 62 0 ++++++++++++++++++++++++++++++++++++++++----------------------
1 file changed, 111 insertions(+), 62 deletions(-)

 Original patch from Gentoo:

 gentoo/src/patchsets/binutils/2.19/91_all_libiberty-pic.patch

 diff -durN binutils-2.19.orig/libiberty/Makefile.in binutils-2.19/libiberty/Makefile.in

 --- binutils-2.19.orig/libiberty/Makefile.in	2008-07-24 15:51:49.000000000 +0200

 +++ binutils-2.19/libiberty/Makefile.in	2008-11-23 17:03:33.000000000 +0100

 @@ -227,6 +227,7 @@

  	  $(AR) $(AR_FLAGS) $(TARGETLIB) \

  	    $(REQUIRED_OFILES) $(EXTRA_OFILES) $(LIBOBJS); \

  	  $(RANLIB) $(TARGETLIB); \

 +	  cp $(TARGETLIB) ../ ; \

  	  cd ..; \

  	else true; fi