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Re: 950523: netcdf build problem on DEC Alpha 2100

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  • Subject: Re: 950523: netcdf build problem on DEC Alpha 2100
  • Date: Thu, 25 May 1995 10:42:25 -0600
John,

> I had the same problem with the interactive patch with the native
> patch program.  The 2.1 gnu-patch worked fine except that it reported
> the errors I mentioned previously.

And here the 2.1 gnu-patch worked fine, and reported no errors using the
same patches, on the same sources (both from the FTP directory), on the same
platform (OSF/1 Alpha).  Since I can't reproduce the problem here, I'm
giving up on that one.

> >             However, I would think you should be using "g++" rather than
> > "gcc" for the compiler.  Have you tried compiling the C++ interface by
> > invoking
> > 
> >    make CCC=g++
> 
> As far as I know all version 2 and higher gcc compilers are C and C++
> (if you build them that way, which I did) so the g++ is only a link to
> gcc; they are the same program.

Yes, but it makes a difference whether you invoke the compiler as "gcc" or
as "g++" on the same source, even if g++ is a link to gcc.  The compiler
actually checks argv[0] to see how it was invoked and behaves differently in
the two cases, since C++ is not just a superset of standard C.  For example,
compiling and running the following program would have to return a different
value if you used gcc (4) than if you used g++ (1), because it is impossible
to tell from the source whether it is C or C++, and the program behaves
differently depending on whether it is interpreted to be ANSI C or C++:

int
main()
{
        return sizeof('a');
}

If you want to compile C++ code with gcc, you have to invoke it as "g++".

______________________________________________________________________________

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