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(-)

 # dmalloc debug facility

 config DEBUG_dmalloc

     bool

 choice

     bool

     prompt "dmalloc version"

 config DMALLOC_V_5_4_3

     bool

     prompt "5.4.3 (OBSOLETE)"

     depends on OBSOLETE

 config DMALLOC_V_5_5_2

     bool

     prompt "5.5.2"

 # CT_INSERT_VERSION_ABOVE

 # Don't remove above line!

 endchoice

 config DMALLOC_VERSION

     string

     default "5.4.3" if DMALLOC_V_5_4_3

     default "5.5.2" if DMALLOC_V_5_5_2

 # CT_INSERT_VERSION_STRING_ABOVE

 # Don't remove above line!