Hi,

The attached patch attempts to do the Right Thing for internal variables 
when 'set endian' is used (explicitly or implicitly).

I have not (and cannot) test it with all varieties of host machine and 
type, but I am confident that it works on x86 Linux and sparc Solaris 
for integer (including pointer) and float types.

I have run the regression test suite on i686-pc-linux-gnu native and 
sh-elf cross.

Demonstration:

Before

   (gdb) set $a = 1
   (gdb) set $b = (float)1.1
   (gdb) set $c = (double)1.2
   (gdb) set $d = (long double)1.3
   (gdb) set $e = (long long)10000000
   (gdb) show conv
   $e = 10000000
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 1
   $trace_frame = -1
   $tpnum = 0
   (gdb) show endian
   The target endianness is set automatically (currently little endian)
   (gdb) set endian big
   The target is assumed to be big endian
   (gdb) show conv
   $e = -9180983664580755456
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 16777216
   $trace_frame = -1
   $tpnum = 0
   (gdb) set endian little
   The target is assumed to be little endian
   (gdb) show conv
   $e = 10000000
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 1
   $trace_frame = -1
   $tpnum = 0

After

   (gdb) set $a = 1
   (gdb) set $b = (float)1.1
   (gdb) set $c = (double)1.2
   (gdb) set $d = (long double)1.3
   (gdb) set $e = (long long)10000000
   (gdb) show conv
   $e = 10000000
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 1
   $trace_frame = -1
   $tpnum = 0
   (gdb) show endian
   The target endianness is set automatically (currently little endian)
   (gdb) set endian big
   The target is assumed to be big endian
   (gdb) show conv
   $e = 10000000
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 1
   $trace_frame = -1
   $tpnum = 0
   (gdb) set endian little
   The target is assumed to be little endian
   (gdb) show conv
   $e = 10000000
   $d = 1.3000000000000000444089209850062616
   $c = 1.2
   $b = 1.10000002
   $a = 1
   $trace_frame = -1
   $tpnum = 0

Andrew Stubbs