James Clarks SGML Toolkit on debian HPPA

["WERNER,WOLFGANG (HP-Germany,ex1)" <werner@hp.com>]

Hi,
i need the sp tool set from James Clark and was not able to find a binary
package.
I didn't succeed in compiling it myself:

wwerner@hpeaso92:/tmp/sp-1.3.4$ make sx
make[1]: Entering directory `/tmp/sp-1.3.4/lib'
c++ -fno-implicit-templates -O2 -ansi   -I. -I./../include -I./../generic
-DSP_HAVE_BOOL -DSP_ANSI_CLASS_INST -DSP_MULTI_BYTE   -c CmdLineApp.cxx
CmdLineApp.cxx: In member function `int CmdLineApp::run(int, char**)':
CmdLineApp.cxx:217: parse error before `)' token
CmdLineApp.cxx:223: confused by earlier errors, bailing out
make[1]: *** [CmdLineApp.o] Error 1
make[1]: Leaving directory `/tmp/sp-1.3.4/lib'
make: *** [lib] Error 2

Am I missing something obvious?
Thanks in advance,
Wolfgang