Re: 961211: Problem building netCDF 2.4.3 for UNICOS 8

>To: address@hidden
>From: "Susan C. Cherniss" <address@hidden>
>Subject: Problem building netCDF 2.4.3 for UNICOS 8
>Organization: NASA Ames Research Center
>Keywords: 199612112358.AA03260

Hi Susan,

> I am trying to build netCDF 2.4.3 for UNICOS 8.0.4 on a C90 and have
> run into problems compiling netcdf.cc.  The details are below.
> Any suggestions on getting past this problem?

Yes, if you can get by without the C++ interface to netCDF then you can
just define CXX="" before running the configure script (do a make clean
first and rm config.cache).  You can set the value of CXX as an
environment variable or in the CUSTOMIZE file.

> 0.  CC -V
> Cray C++ Version 2.0.0.2 12/11/96 15:37:04
> 
> 1.  Output from the command `uname -a'.
> vn vn 8.0.4.2 nas.55 CRAY C90

 ...

> making `all' in directory /u/vb/cherniss/netcdf/unicos8.0.4/cxx
> 
> gmake[1]: Entering directory `/u/vb/cherniss/netcdf/unicos8.0.4/cxx'
> CC -c  -I../libsrc   netcdf.cc
> CC-403 CC: ERROR File = netcdf.hh, Line = 76
>   Member function function "NcFile::add_att" has already been declared.
> 
>       NcBool add_att( NcToken attname, ncbyte );
>              ^

I've appended a description of the details of the problem, if you decide
you need the C++ interface and want to try to get Cray to fix the
compiler problem.  I've reported it already ...

_____________________________________________________________________

Russ Rew                                         UCAR Unidata Program
address@hidden                     http://www.unidata.ucar.edu


I've looked into the C++ errors revealed by trying to compile the netCDF 2.4
C++ interface on the Cfront-based Cray compiler on [a local Cray] and
concluded that this is a compiler problem that we can't easily work around.

I've isolated the problem to a small demonstration program that demonstrates
a failure to distinguish plain char, signed char, and unsigned char as three
distinct types for overloading function signatures:

--------------------------------------
#include <iostream.h>

class X {
public:
    X() {}
    void f(char c)           {cout << "char "          << c << "\n";}
    void f(signed char s)    {cout << "signed char "   << s << "\n";}
    void f(unsigned char u)  {cout << "unsigned char " << u << "\n";}
};

int
main()
{
    X x;
    char c = 'c';
    signed char s = -13;
    unsigned char u = 'u';

    x.f(c);
    x.f(s);
    x.f(u);

    return 0;
}
--------------------------------------

The above program conforms to the proposed C++ standard, as far as I have
been able to determine (see, for example, chapters 3 and 4 of the draft
standard at <URL http://www.csci.csusb.edu/dick/c%2b%2bstd/september/>).
It compiles with no errors or warnings and runs fine on the following
platform/compiler combinations:

    SunOS 5.4 or SunOS 4.1.4, CC 3.0.1:
    SunOS 5.4, g++ 2.6.3:
    IRIX 6.1, CC
    OSF1 3.2, g++ 2.7.2:
    AIX 4.1.4, xlC:

It also runs fine on the following platform, though it produces a warning:

    IRIX 5.3, CC
        "chars.cc", line 7: warning(3672): Mangling of signed character does
                            not match cfront name mangling.
              void f(signed char s)    {cout << "signed char "   << s << "\n";}
                   ^
However, it fails to compile on [a local Cray].

--Russ