From owner-bug-octave at bevo dot che dot wisc dot edu  Wed Dec 18 15:34:41 1996
Subject: 2.0 compilation problem
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Francesco Potorti` <F dot Potorti at cnuce dot cnr dot it>
Cc: Octave bugs list <bug-octave at bevo dot che dot wisc dot edu>
Date: Wed, 18 Dec 1996 15:34:01 -0600

On 18-Dec-1996, Francesco Potorti` <F dot Potorti at cnuce dot cnr dot it> wrote:

:     I just installed gcc 2.7.2 under my home directory, because my
: sysadmin is not very responsive.  I try to compile octave 2.0 under
: Alpha, but after the compilation goes on flawlessly for a while, I get
: file not found errors.  Indeed, g++ does not look in the include dirs
: it has set up under my home directory.  That's why I have added this
: to the gcc specs file:
: 
:  -isystem /usr/users/pot/lib/gcc-lib/alpha-dec-osf3.0/2.7.2/include
:  -isystem /usr/users/pot/alpha-dec-osf3.0/include
:  -isystem /usr/users/pot/lib/gcc-lib/alpha-dec-osf3.0/2.7.2/include/g++
:  -isystem /usr/users/pot/lib/gcc-lib/alpha-dec-osf3.0/2.7.2/include/g++/std
:  -isystem /usr/include/g++ -isystem /usr/include/g++/std

I don't understand why this should be necessary if you installed gcc
properly.  If you run

  ./configure --prefix=/usr/users/pot ; make bootstrap ; make install

it should just work.

: This makes the compilation proceed futher, but then it stops with an
: error which I don't know how to handle.  I am stuck, because I suspect
: a gcc installation problem.  Can you confirm this?  Here is the error,
: obtained with a make all in liboctave:
:
: ...
:
: The strange thing is that there is no `::' in stddef.h.

Did you run Octave's configure script before or after fixing the
include path for gcc?  It should have found that your system provides
a declaration for NPOS, but I would guess that it did not, and added

  #define NPOS string::npos

to config.h.

The reason I didn't define this to be (size_t)(-1) is that I
understand that the draft standard has changed and because it appears
that libg++ 2.8.x will have string::npos but not NPOS.

The quick solution would probably be to delete the definition of NPOS
in Octave's config.h file.  However, this shouldn't really be
necessary.  If running Octave's configure with gcc properly installed
still results in NPOS being defined in Octave's config.h file, can you
try to find out why?

Thanks,

jwe