hash maps

[Gideon]

hiya all, would anyone know why making exult on knoppix 4.0 (debian derivative) would spit this error out:

Making check in shapes
make[1]: Entering directory `/home/gideons/exult 2/exult-1.2/shapes'
source='bodies.cc' object='bodies.lo' libtool=yes \
depfile='.deps/bodies.Plo' tmpdepfile='.deps/bodies.TPlo' \
depmode=gcc3 /bin/sh ../depcomp \
/bin/sh ../libtool --mode=compile g++ -DHAVE_CONFIG_H -I. -I. -I.. -I./../headers -I./.. -I./../files -I./../imagewin -I/usr/include/SDL -D_REENTRANT -I/usr/include/freetype2 -DXWIN -O2 -Wno-long-long -g -O2 -c -o bodies.lo `test -f bodies.cc || echo './'`bodies.cc
g++ -DHAVE_CONFIG_H -I. -I. -I.. -I./../headers -I./.. -I./../files -I./../imagewin -I/usr/include/SDL -D_REENTRANT -I/usr/include/freetype2 -DXWIN -O2 -Wno-long-long -g -O2 -c bodies.cc -MT bodies.lo -MD -MP -MF .deps/bodies.TPlo -o bodies.o
../hash_utils.h:32: error: 'std::hash_map' has not been declared
../hash_utils.h:50: error: 'std::hash_set' has not been declared
../game.h:60: error: ISO C++ forbids declaration of 'hash_map' with no type
../game.h:60: error: expected ';' before '<' token
../game.h:61: error: ISO C++ forbids declaration of 'hash_map' with no type
../game.h:61: error: expected ';' before '<' token
bodies.cc: In static member function 'static int Body_lookup::find(int, int&, int&)':
bodies.cc:424: error: expected initializer before '<' token
bodies.cc:429: error: 'htable' was not declared in this scope
bodies.cc:432: error: expected type-specifier before 'hash_set'
bodies.cc:432: error: expected `;' before 'hash_set'
bodies.cc:456: error: 'hash_set' was not declared in this scope
bodies.cc:456: error: expected primary-expression before 'short'
bodies.cc:456: error: expected `;' before 'short'
bodies.cc:461: error: 'it' was not declared in this scope
bodies.cc:461: error: 'htable' was not declared in this scope
make[1]: *** [bodies.lo] Error 1
make[1]: Leaving directory `/home/gideons/exult 2/exult-1.2/shapes'
make: *** [check-recursive] Error 1

I know gcc is installed and working correctly because I've "made" other software before trying to do this.

./configure reports that I've only got the extended hash function libs not the basic ones.

any enlightenment would be greatly appreciated.