undefined reference to _gfortran_set_options

[Brian Dessent]

"Rouson, Damian" wrote:

> The parallel
> build links with mpicxx and gives the above error.  I'm using a binary of
> gfortran 4.4.0 downloaded about a month ago, but I mpicxx seems to be
> wrapping g++ 4.1.2.

So, essentially you're compiling objects with gfortran 4.4 but trying to
link them with libgfortran 4.1?

> Could this difference in version numbers be causing the
> above problem?

Yes, you can't mix and match like that.  They have to correspond.

As I understand it libgfortran starting with 4.3 uses symbol versioning,
which means that it's permissible that the version of libgfortran that
is present at run-time is >= the libgfortran version that was used at
link-time.  But that doesn't apply here because A) the libgfortran
version at link-time must still match the version of the compiler used,
and B) it only works in the >= direction, not the < direction.  (And it
only works on targets where symbol versioning is supported, of course.)

Brian