Status of FLTK on MacOS X

[Ben Abbott]

I compiled the current sources on MacOS 10.6.2 using a gfortran from …

        http://r.research.att.com/tools/

The site above provides a gfortran that is intended to be compatible with the 
gcc compiler and libraries included with Apple's Xcode (version 4.2.x).

I did this in the hope that I'd be able to link to the Carbon and OpenGL 
Frameworks.

The good news is that the experiment was a success, in that the resulting 
Octave produces no errors with run, is able to use the FLTK backend, and 
produces no errors when exited.

The bad news is that I encountered many failures during "make check"; as 
summarized below.

  src/DLD-FUNCTIONS/eigs.cc .............................. PASS    0/149  FAIL 
149
  src/data.cc ............................................ PASS  544/545  FAIL 1
  scripts/sparse/svds.m .................................. PASS    0/3    FAIL 3

  PASS   5502
  FAIL    155

The data.cc error is …

1473   ***** assert(log2(complex(0,Inf)), Inf + log2(i));
1474 !!!!! test failed
1475 assert (log2 (complex (0, Inf)),Inf + log2 (i)) expected
1476 Inf + 2.266i
1477 but got
1478 Inf - NaNi
1479 NaNs don't match

… which I don't consider a significant problem.

The remaining errors appear to be due to using gfortran from gcc 4.4 to build 
suitesparse and arpack.

I assume these errors result from mixing Apple's gcc 4.2 with gcc 4.4. As I 
have time, I will try to verify that.

Ben