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(-)

# Super-H specific configuration file

# EXPERIMENTAL

config ARCH_sh

    select ARCH_SUPPORTS_BOTH_ENDIAN

    select ARCH_DEFAULT_LE

    help

      The Super-H architecture, as defined by:

        http://www.renesas.com/fmwk.jsp?cnt=superh_family_landing.jsp&fp=/products/mpumcu/superh_family/

choice

    bool

    prompt "Variant"

config ARCH_SH_SH3

    bool

    prompt "sh3"

config ARCH_SH_SH4

    bool

    prompt "sh4"

config ARCH_SH_SH4A

    bool

    prompt "sh4a"

endchoice

config ARCH_SH_VARIANT

    string

    default "sh3"   if ARCH_SH_SH3

    default "sh4"   if ARCH_SH_SH4

    default "sh4a"  if ARCH_SH_SH4A