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(-)

 # strace

 menuconfig STRACE

     bool

     prompt "strace"

     default n

 if STRACE

 choice

     bool

     prompt "strace version"

 config STRACE_V_4_5

     bool

     prompt "4.5 (OBSOLETE)"

     depends on OBSOLETE

 config STRACE_V_4_5_14

     bool

     prompt "4.5.14 (OBSOLETE)"

     depends on OBSOLETE

 config STRACE_V_4_5_15

     bool

     prompt "4.5.15"

 config STRACE_V_4_5_16

     bool

     prompt "4.5.16"

 # CT_INSERT_VERSION_ABOVE

 # Don't remove above line!

 endchoice

 config STRACE_VERSION

     string

     default "4.5" if STRACE_V_4_5

     default "4.5.14" if STRACE_V_4_5_14

     default "4.5.15" if STRACE_V_4_5_15

     default "4.5.16" if STRACE_V_4_5_16

 # CT_INSERT_VERSION_STRING_ABOVE

 # # Don't remove above line!

 endif