From owner-bug-octave at bevo dot che dot wisc dot edu  Wed Dec 11 11:46:22 1996
Subject: C++ compile error on Sun SPARC SunOS4.1.4
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Andrew J. Deighan" <deighan at geology dot gla dot ac dot uk>
Cc: bug-octave at bevo dot che dot wisc dot edu
Date: Wed, 11 Dec 1996 11:45:35 -0600

On 11-Dec-1996, Andrew J. Deighan <deighan at geology dot gla dot ac dot uk> wrote:

: Bug report for Octave 2.0 configured for sparc-sun-sunos4.1.4
: 
: The compilation fails in the src directory when trying to compile the
: sighandlers.cc file.
: 
: The output is:
: 
: making all in src
: cd src ; /home/gph/deighan/SOFTWARE/OTHERS/make-3.75/bin/make all
: make[2]: Entering directory `/tmp_mnt/work/andy/OCTAVE/octave-2.0/src'
: c++ -c  -I. -I.. -I../liboctave -I../src -I../glob -I../libcruft/misc  -DHAVE_CONFIG_H  -fno-implicit-templates  -g -O2 -Wall sighandlers.cc
: sighandlers.cc: In function `void my_friendly_exit(const char *, int)':
: sighandlers.cc:128: passing `void (*)()' as argument 2 of `octave_set_signal_handler(int, void (*)(int))'
: sighandlers.cc: In function `void (* octave_set_signal_handler(int, void (*)(int)))(int)':
: sighandlers.cc:168: warning: ANSI C++ prohibits conversion from `(int)' to `(...)'
: sighandlers.cc: In function `void sigint_handler(int)':
: sighandlers.cc:274: warning: unused parameter `int sig'
: sighandlers.cc: In function `struct octave_interrupt_handler * octave_ignore_interrupts()':
...

It is likely that this problem can be fixed by editing a copy of the
signal.h include file in gcc's private include directory.  The
following information is from the INSTALL.OCTAVE file distributed with
Octave (also part of the manual):

   * You may need to edit some files in the gcc include subdirectory to
     add prototypes for functions there.  For example, Ultrix 4.2 needs
     proper declarations for the `signal()' and the `SIG_IGN' macro in
     the file `signal.h'.

     On some systems the `SIG_IGN' macro is defined to be something like
     this:

          #define  SIG_IGN  (void (*)())1

     when it should really be something like:

          #define  SIG_IGN  (void (*)(int))1

     to match the prototype declaration for `signal()'.

     The gcc fixincludes/fixproto script should probably fix this when
     gcc installs its modified set of header files, but I don't think
     that's been done yet.

jwe