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(-)

 --- glibc-2.7/glibc-ports-2.7.orig/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2007-06-06 19:27:04.000000000 +0200

 +++ glibc-2.7/glibc-ports-2.7/sysdeps/unix/sysv/linux/arm/nptl/sysdep-cancel.h	2008-05-18 16:57:21.000000000 +0200

 @@ -73,6 +73,9 @@

  # define DOCARGS_5	DOCARGS_4

  # define UNDOCARGS_5	UNDOCARGS_4

 +# define DOCARGS_6    DOCARGS_5

 +# define UNDOCARGS_6  UNDOCARGS_5

 +

  # ifdef IS_IN_libpthread

  #  define CENABLE	bl PLTJMP(__pthread_enable_asynccancel)

  #  define CDISABLE	bl PLTJMP(__pthread_disable_asynccancel)