MacOSX: ismac() implementation

[John W. Eaton]

On  6-Sep-2007, John W. Eaton wrote:

| 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

Sorry, I meant to put

  function retval = ismac ()

    if (nargin == 0)
      retval = octave_config_info ("mac");
    else
      print_usage ();
    endif

  endfunction

here.

| 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