MacOSX: ismac() implementation

[John W. Eaton]

On  1-Sep-2007, Thomas Treichl wrote:

| I've found that there should be a ismac() function. I've some questions how 
| ismac() should be implemented: The easy way would be a function like the one 
| that I've attached but I was also thinking about another implementation like 
the 
| one for the MSVC version ie. feed through a #define from the CFLAGS in 
| configure.in (eg. -DMACOSX) and then set or not set the values in 
src/toplev.cc 
| DEFUN_DLD octave_config_info. The second solution would make more sense to me 
| because then I could also send a patch for problems that may appear on the 
Mac 
| platform and the different distributions must not patch the codes locally 
(eg. 
| the A = [1:56]'/[1:56]' problem we've already discussed - I should also tell 
you 
| that Apple is informed but I didn't get a fix yet and I think that older 
| versions of Apple's vecLib won't be fixed at all, ie. people having a OSX 
10.3 
| system will have this bug also in the future). And the last question is: If 
| ismac() then !isunix()? If so then other files must be changed too and I need 
to 
| know...

So that the implementation is similar to the current isunix and ispc
functions, I think ismac should just be

plus the copyright notice and doc string.

To make octave_config_info handle "mac", we need to change the
following lines in the DEFUN for octave_config_info in toplev.cc

        bool unix_system = true;
        bool windows_system = false;

  #if defined (WIN32)
        windows_system = true;
  #if !defined (__CYGWIN__)
        unix_system = false;
  #endif
  #endif

        m.assign ("unix", octave_value (unix_system));
        m.assign ("windows", octave_value (windows_system));

to be something like

        bool unix_system = true;
        bool mac_system = false;
        bool windows_system = false;

  #if defined (WIN32)
        windows_system = true;
  #if !defined (__CYGWIN__)
        unix_system = false;
  #endif
  #endif

  #if defined (???)
        mac_system = true;
  #endif

        m.assign ("unix", octave_value (unix_system));
        m.assign ("mac", octave_value (mac_system));
        m.assign ("windows", octave_value (windows_system));

but I'm not sure what macro we should test.  If there is nothing
predefined, then we will need some kind of change in configure.in as
well.

jwe