CGAL users discussion list

[Marius Kintel <(005b7a4cd6%hidden_head%005b7a4cd6)marius(005b7a4cd6%hidden_at%005b7a4cd6)kintel.net(005b7a4cd6%hidden_end%005b7a4cd6)>]

On May 29, 2012, at 23:50 PM, Joachim Reichel wrote:
> 
> to test the basic rounding mode stuff you could try the attached test case.
> 
Thanks for the tip!

I've run this on two computers (Mac OS X 10.6 and 10.7) and the two available 
compilers for each computer.
As you can see from the output below, the only way to get an optimized build 
to work is to use the plain gcc compiler, which is no longer available 
starting with Mac OS X 10.7.

I guess that's bad news in terms of CGAL-compatibility for Mac OS X.

Ideas are welcome :)

Thanks,

 -Marius

---------------

Error configurations:
  10.6 gcc-4.2.1
    c++ -O2 rounding_modes1.cpp -o rounding_modes1
  10.6 llvm-gcc-4.2.1
    llvm-g++ -O2 rounding_modes1.cpp -o rounding_modes1
    llvm-g++ -O2 -frounding-math rounding_modes1.cpp -o rounding_modes1
  10.7 llvm-gcc-4.2.1
    llvm-g++ -O2 rounding_modes1.cpp -o rounding_modes1
    llvm-g++ -O2 -frounding-math rounding_modes1.cpp -o rounding_modes1
  10.7 clang-3.1
    c++ -O2 -frounding-math rounding_modes1.cpp -o rounding_modes1
    c++ -O2 rounding_modes1.cpp -o rounding_modes1

OK configurations:
  10.6 gcc-4.2.1
    c++ rounding_modes1.cpp -o rounding_modes1
    c++ -frounding-math rounding_modes1.cpp -o rounding_modes1
    c++ -O2 -frounding-math rounding_modes1.cpp -o rounding_modes1
  10.6 llvm-gcc-4.2.1
    llvm-g++ rounding_modes1.cpp -o rounding_modes1
    llvm-g++ -frounding-math rounding_modes1.cpp -o rounding_modes1
  10.7 llvm-gcc-4.2.1
    c++ rounding_modes1.cpp -o rounding_modes1
    c++ -frounding-math rounding_modes1.cpp -o rounding_modes1
  10.7 clang-3.1
    c++ rounding_modes1.cpp -o rounding_modes1
    c++ -frounding-math rounding_modes1.cpp -o rounding_modes1

Error behavior:
fegetround() = FE_TONEAREST   
fesetround (FE_TOWARDZERO)
fegetround() = FE_TOWARDZERO   (ok)
fetestround() = FE_TONEAREST   (error)
fesetround (FE_UPWARD)
fegetround() = FE_UPWARD   (ok)
fetestround() = FE_TONEAREST   (error)
fesetround (FE_DOWNWARD)
fegetround() = FE_DOWNWARD   (ok)
fetestround() = FE_TONEAREST   (error)
fesetround (FE_TONEAREST)
fegetround() = FE_TONEAREST   (ok)
fetestround() = FE_TONEAREST   (ok)