avl and gfortran

[Tobias Schlüter]

Jack Howarth wrote:
>     Has anyone tried building the AVL program from...
> 
> http://web.mit.edu/drela/Public/web/avl/
> 
> with gfortran? The fink packager of this program is
> noticing regressions compared to using g95. On my
> ppc Darwin8 box, I noticed that the session1.txt
> tests seem to go astray. In particular, for the
> section...
> 
> C1         enter horizontal-flight trim setup menu
>   G 9.8      set gravitational acceleration
>   D 1.2      set air density
>   M 100.0    set mass
>   B 30.0     set 30 deg bank angle
>   <Return>   return to OPER menu
> 
> X          execute calculation
> T          show Trefftz Plane plot
> 
> The calculation shows nothing but NaN results. This
> is with all of the gfortran code compiled at -O3
> and -fdefault-real-8 while the c code is compiled
> at -O3. It might be worth looking at this for
> some more corner cases where gfortran is failing.

I don't know if it relies on C-Fortran interoperability, but maybe it 
needs -ff2c?

- Tobi