./configure error

[blazejkow]

I am new to the software and I am trying to get acquainted with it. When I ran the ./configure script to check if everything checks out before installation I got the following error. I tried downgrading ubuntu and fortran versions but the same error keeps popping up. Do you have any idea how to get around this?

[mdelorme]

Hi,

I have the same version of gfortran and no problem configuring the code.
Could you check inside the config.log file and check for a line that looks like :

configure:4434: checking whether C++ compiler accepts -fPIC

There should be more information about what is actually failing in the configuration stage here.

[blazejkow]

Hi,

actually, it looks like the checks do not reach this point. they fail earlier and the script stops at that point (see attachment - configure:3332) so it never reaches configure:4434 which relates to c++, not Fortran btw. I wonder if I can manually add this option to gfortran compiler.

[mdelorme]

actually, it looks like the checks do not reach this point. they fail earlier and the script stops at that point (see attachment - configure:3332) so it never reaches configure:4434 which relates to c++, not Fortran btw

You're right, my bad.

Looking at the log, it might be because MPI compilation is activated by default, and the system does not find a version of mpif77. Two options : Either you're not planning on running on multiple nodes, in which case MPI is utterly useless and you can try to configure adding the option --disable-mpi or, you want to have mpi activated in which case I would recommend installing the relevant OpenMPI packages in Ubuntu.

[blazejkow]

It worked:) Thanks. It turned out I simply had to specify some arguments to the ./configure script. I was misled by the manual where it says that running it without any arguments will give you the answer about all the required setup but maybe I just misunderstood it:) anyway it worked after I fired:
./configure --disable-mpi --enable-simd=sse --prefix=/home/blazej/phd/nbody --enable-tools

[blazejkow]

While we still have this thread open maybe you have an idea of how to proceed further. Upon executing 'make' I got the following error. Looks like two variables having different data types in chaos.f file. I assume I am lacking some packages in my environment otherwise this would pop up for everyone?

[mdelorme]

I never had this with nbody6 but had this with another code. One way to avoid this is to relax the constraints on the compiler. Try this :

export FCFLAGS='-fallow-argument-mismatch'
./configure [--youroptionshere]

And rebuilding after.