Adding prototypes for functions etc

[fat]

Hi guys,
     I need help with installing octave version 1.0 on a Decstation 5000
running ultrix version 4.3. We are running gcc 2.5.7, and make 3.7. Everything
compiles normally until we get to the src directory and g++ tries compiling
octave.cc then I get the following warnings and errors:
  g++ -c  -I. -I. -I.. -I../liboctave -I. -I./liboctave  -DHAVE_CONFIG_H
  -fexternal -templates  -g -O octave.cc
  In file included from octave.cc:59:
  Stack.h:31: warning: templates that are built with -fexternal-templates
  should be in files that have #pragma interface/implementation
  octave.cc: In function `void initialize_globals(char *)':
  octave.cc:176: warning: implicit declaration of function `int endpwent(...)'
  octave.cc: In function `int main(int, char **)':
  octave.cc:445: warning: ANSI C++ prohibits conversion from `()' to `(...)'
  octave.cc:523: incompatible pointer types for argument 2 of `void (*
  signal(int,void (*)(int)))(int)'
  make[1]: *** [octave.o] Error 1

I saw this error mentioned in the installation guide however, I don't know
what to do about prototypes for signal () etc..

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