newbie compiler error understanding problems

[Dave Morse]

Hi,

I'm trying to port a C++ program to use G++.  I get several error messages
that I don't understand.  Maybe someone on this list is willing to help me
out?  

First off, shouldn't these be warnings, not errors?  

Secondly, aren't they library functions?

  g++ -g -DLINUX  -DNO_OSTREAM_WITHASSIGN -o ../bin/linux/simpleWriter linux/simple.o linux/simpleMain.o  -L ../../lib -lexchange;
  ../../lib/libexchange.a(exchafun.o): In function `geString::asChar(void) const':
  /home/dm/game-exchange-cvs/GameExchange/gapilib/build/../include/gelist.h(.text+0x0): multiple definition of `ios::tie(void) const'
  ../../lib/libexchange.a(exchared.o)(.text+0x0):/home/dm/game-exchange-cvs/GameExchange/gapilib/build/../include/gestring.h: first defined here

  [270K more error messages, mostly the same, see http://64.89.51.47/~dm/cxx.txt ]

  ../../lib/libexchange.a(gestring.o): In function `geString::asChar(void) const':
  /home/dm/game-exchange-cvs/GameExchange/gapilib/build/../include/gestring.h(.text+0x1338): multiple definition of `_IO_ostream_withassign::operator=(_IO_ostream_withassign &)'
  ../../lib/libexchange.a(exchared.o)(.text+0x1338):/home/dm/game-exchange-cvs/GameExchange/gapilib/build/../include/gestring.h: first defined here
  collect2: ld returned 1 exit status
  make: *** [../bin/linux/simpleWriter] Error 1

I'm using: gcc 2.95.2 with libstdc++ 2.90.8. (in /usr/local/bin)
I also get the same results with egcs-2.91.66 (in /usr/bin)

Thank you for your time.