From bug-octave-request at bevo dot che dot wisc dot edu  Tue Nov  2 21:05:53 1999
Subject: Warnings compiling octave-2.1.19 with latest egcs snapshot
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Billinghurst, David (RTD)" <David dot Billinghurst at riotinto dot com dot au>
Cc: "'bug-octave at bevo dot che dot wisc dot edu'" <bug-octave@bevo.che.wisc.edu>
Date: Tue, 2 Nov 1999 21:05:21 -0600 (CST)

On  3-Nov-1999, Billinghurst, David (RTD) <David dot Billinghurst at riotinto dot com dot au> wrote:

| There were a few more warnings compiling octave-2.1.19 with latest
| (19991025) egcs snapshot
| 
| For various types <T> - in this case Complex - we get
| 	liboctave/DiagArray2.cc:93: warning: unused variable `Complex *bar'
| and
| 	liboctave/DiagArray2.cc:107: warning: unused variable `Complex *bar'
| My C++ is not adequate to comment.

OK, I fixed these, now that it is possible to say

  template <class T> T some_function () { return T (); }

even for builtin types like double, int, etc.

| Also need to #include <string.h> for liboctave/getopt.c
| 	liboctave/getopt.c: In function `_getopt_internal':
| 	/liboctave/getopt.c:455: warning: implicit declaration of function
| `strncmp'

Hmm.  The comments in that code say:

  /* We want to avoid inclusion of string.h with non-GNU libraries
     because there are many ways it can cause trouble.
     On some systems, it contains special magic macros that don't work
     in GCC.  */

Perhaps it is best to just ignore this warning, which only occurs
because Octave's Makefiles add -Wall to the compiler flags when gcc
and g++ are used.

How many packages do you know of that compile cleanly with -Wall?

jwe



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