[Aj_45]

Hi,
I am trying to compile following udf for fluent 15.0 on linux system

#include "udf.h"

real velx = 0.0;

DEFINE_CG_MOTION(box, dt, vel, omega, time, dtime)
{
        NV_S(vel, =, 0.0);
        NV_S(omega, =, 0.0);

        velx = 0.05 * sin(3.1415927 * time / 10);
        vel[0] = velx;

}

But I get the following error:


# Compiling grid_motion.o because of grid_motion.c
cc -D_lnamd64 -D_GNU_SOURCE -fpic -shared -ansi -Wall -O -DPTR_RESTRICT= -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/`expr "\`pwd\`" : '.*/\(.*\)/[23].*'`/`basename "\`pwd\`"` -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/src -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/cortex/src -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/client/src -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/tgrid/src -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/multiport/src -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/multiport/mpi_wrapper/include -I/export/apps/ansys_inc/v150/fluent/fluent15.0.0/multiport/mpi_wrapper/src -I. -c grid_motion.c
/bin/sh: cc: command not found
make[3]: *** [grid_motion.o] Error 127
make[3]: Target `libudf.so' not remade because of errors.
make[3]: Leaving directory `/home/ajinkya/aj/mesh_motion/libudf/lnamd64/2ddp'
make[2]: *** [lnamd64] Error 2
make[2]: Leaving directory `/home/ajinkya/aj/mesh_motion/libudf/lnamd64/2ddp'
make[1]: *** [default] Error 2
make[1]: Leaving directory `/home/ajinkya/aj/mesh_motion/libudf/lnamd64/2ddp'


A similar thread for cc: command not found, on the forum suggest installing the gcc compiler but I guess I have it installed already.
which gcc returns: /usr/local/bin/gcc
which cc returns: no cc in (...)


I am compiling the udf in gui using (Define-User defined-Functions-Compiled) and then adding the source file followed by clicking the 'build' option.


What could be the problem here?
Thanks,
Ajinkya

[AlexanderZ]

you may try to compile from terminal, but you should create make file first.

For more information about that check Ansys Fluent Customization manual