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(-)

--- gcc/gcc/config.gcc.uclibc100-sh~	2006-03-06 20:46:56 +0100

+++ gcc/gcc/config.gcc	2006-03-10 15:02:41 +0100

@@ -1905,7 +1905,7 @@

 	;;

 sh-*-elf* | sh[12346l]*-*-elf* | sh*-*-kaos* | \

 sh-*-symbianelf* | sh[12346l]*-*-symbianelf* | \

-  sh-*-linux* | sh[346lbe]*-*-linux* | \

+  sh*-*-linux* | sh[346lbe]*-*-linux* | \

   sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \

    sh64-*-netbsd* | sh64l*-*-netbsd*)

 	tmake_file="${tmake_file} sh/t-sh sh/t-elf"