GMP and MPFR are no longer a sub-component of gcc (config-wise).
Build and install GMP and MPFR for the target.
Use the target GMP and MPFR to build the native gdb.
Have separate extra_config for cross gdb, native gdb and gdbserver.
Check native GMP and MPFR in //.

/trunk/scripts/build/debug/300-gdb.sh | 27 19 8 0 ++++++++++++++++-------
/trunk/scripts/build/gmp.sh | 47 39 8 0 ++++++++++++++++++++++++++++++++-------
/trunk/scripts/build/mpfr.sh | 49 40 9 0 +++++++++++++++++++++++++++++++++--------
/trunk/steps.mk | 2 2 0 0 ++
/trunk/config/cc/gcc.in | 18 1 17 0 +--------------
/trunk/config/debug/gdb.in | 6 1 5 0 +----
/trunk/config/config.in | 1 1 0 0 +
/trunk/config/gmp_mpfr.in | 34 34 0 0 ++++++++++++++++++++++++++++
8 files changed, 137 insertions(+), 47 deletions(-)

 # GMP options

 choice

     bool

     prompt "MPFR version"

 config MPFR_V_2_3_1

     bool

     prompt "2.3.1"

 # CT_INSERT_VERSION_ABOVE

 # Don't remove above line!

 endchoice

 config MPFR_VERSION

     string

     default "2.3.1" if MPFR_V_2_3_1

 # CT_INSERT_VERSION_STRING_ABOVE

 # Don't remove above line!

 config MPFR_CHECK

     bool

     prompt "Check MPFR"

     default y

     help

       It is highly recommended that 'make check' is run against the newly built

       MPFR library. See http://gmplib.org/