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-2.6.1/sysdeps/unix/sysv/linux/kernel-features.h	2006-07-29 07:43:27.000000000 +0300

+++ glibc-2.6.1/sysdeps/unix/sysv/linux/kernel-features.h.new	2008-07-26 08:45:06.000000000 +0300

@@ -445,7 +445,7 @@

 /* The *at syscalls were introduced just after 2.6.16-rc1.  Due to the way the

    kernel versions are advertised we can only rely on 2.6.17 to have

    the code.  */

-#if __LINUX_KERNEL_VERSION >= 0x020611

+#if __LINUX_KERNEL_VERSION >= 0x020611 && !defined __alpha__

 # define __ASSUME_ATFCTS	1

 #endif