[Developers] Detection of gfortran

[Ian Hinder]

Hi,

I am trying to use Cactus (latest development version) on my laptop with
gcc and gfortran.  The laptop is running Ubuntu 7.10.  In my config file
I have

F90=gfortran
F77=gfortran
HDF5=yes
MPI=MPICH
OPTIMISE=no

The compilation stage fails with missing symbols, for example

/home/ian/work/Cactus/configs/wavetoy/lib/libthorn_IDScalarWaveMoL.a(initialdata.F77.o):
In function `idscalarwavemol_initialda
ta_':
initialdata.f:(.text+0xd05): undefined reference to `_gfortran_pow_r8_i4'
i

So it looks like for some reason there is a gfortran library which is
not being picked up.  In the

  Cactus/lib/make/known-architectures/linux

file, I notice the line

    elif test "`$F90 -dumpversion 2>&1 | grep 'GNU Fortran 95'`" ; then

to detect the fortran compiler.  Running

  gfortran -dumpversion

I get

  GNU Fortran (GCC) 4.2.1 (Ubuntu 4.2.1-5ubuntu4)

so it is not reporting itself as "GNU Fortran 95".  Should it be?  If I
modify the detection script to search for "GNU Fortran" instead,
reconfigure and relink, everything works.  So I have two questions:

(1) Should the known architectures file be modified to search just for
"GNU Fortran"?

(2) Why was there no error message that the compiler was not recognized
correctly?

-- 
Ian Hinder
hinder at gravity.psu.edu
http://www.gravity.psu.edu/~hinder