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(-)

 diff -durN gcc-4.2.1.orig/libstdc++-v3/include/c_std/std_cstdio.h gcc-4.2.1/libstdc++-v3/include/c_std/std_cstdio.h

 --- gcc-4.2.1.orig/libstdc++-v3/include/c_std/std_cstdio.h	2006-12-07 10:33:51.000000000 +0100

 +++ gcc-4.2.1/libstdc++-v3/include/c_std/std_cstdio.h	2007-08-03 20:33:24.000000000 +0200

 @@ -144,7 +144,7 @@

  _GLIBCXX_END_NAMESPACE

 -#if _GLIBCXX_USE_C99

 +#if _GLIBCXX_USE_C99 || defined(__UCLIBC__)

  #undef snprintf

  #undef vfscanf