From owner-bug-octave at bevo dot che dot wisc dot edu  Fri Dec 13 00:56:28 1996
Subject: Octave Compile Problem
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Jay J. Williams" <jjw at eecs dot nwu dot edu>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Fri, 13 Dec 1996 00:56:01 -0600

On 12-Dec-1996, Jay J. Williams <jjw at eecs dot nwu dot edu> wrote:

: I'm trying to compile Octave-2.0 for MkLinux and I'm getting the following
: error:
: 
: c++  -I. -I.. -I../liboctave -I../src -I../glob -I../libcruft/misc
: -DHAVE_CONFI
: G_H  -fno-implicit-templates  -g -O2 -Wall -L.. -u MAIN__   -g -o octave \
: octave.o builtins.o  balance.o  chol.o  colloc.o  dassl.o  det.o  eig.o
: expm.o
:  fft.o  fft2.o  filter.o  find.o  fsolve.o  fsqp.o  getgrent.o  getpwent.o
: getr
: usage.o  givens.o  hess.o  ifft.o  ifft2.o  inv.o  log.o  lpsolve.o
: lsode.o  lu
: .o  minmax.o  npsol.o  pinv.o  qpsol.o  qr.o  quad.o  qzval.o  rand.o
: schur.o
: sort.o  svd.o  syl.o  time.o \
: -L../liboctave -L../libcruft -L../readline -L../kpathsea -L../glob
: -L../dlfcn -L
: .  \
: -loctinterp -loctave -ltinst -lcruft  -lreadline -lkpathsea -lglob  \
: -lF77 -lI77  -ltermcap -lm  -lg++
: /usr/lib/libm.a(cabs.o): In function `z_abs':
: cabs.o(.text+0x268): multiple definition of `z_abs'
: /usr/lib/libF77.a(z_abs.o)(.text+0x4): first defined here
: octave.o: In function `str_vec_compare(void const *, void const *)':
: /home/beta/src/octave-2.0/src/../liboctave/str-vec.h:38: undefined
: reference to
: `basic_string<char, string_char_traits<char> >::compare(basic_string<char,
: string_char_traits<char> > const &, unsigned long, unsigned long) const'

...

I would guess that your copies of g++ and libg++ are not properly
installed.  What happens if you try to compile a simple C++ program
like

#include <string>
int
main (void)
{
  string a = "thing one";
  string b = "thing two";
  return (a == b);
}

?

jwe