Rationalise ./configure
- borrow a lot of ideas from Michael ABBOTT ( http://sourceware.org/ml/crossgcc/2008-12/msg00030.html )
- should be conforming to POSIX 1003.1-2008, non compliance due to bashsims is to be considered a bug
- as a result, it now works with dash
- make a little easier to read in some places
- enforce 4-space indentation
- get rid of futile 'return $?'
- quote all variables assignments
- save and restore IFS prior to and after using alternate values
- simplify the TOOLS_TO_CHECK listing

What's left:
- provide a mean to actually _compare_ version numbers
- change the TOOLS_TO_CHECK pattern style to be able to use '|' in regexp

/trunk/configure | 243 127 116 0 ++++++++++++++++++++++++++++++++------------------------------
1 file changed, 127 insertions(+), 116 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!