Illegal instruction - Mac 10.6.5 with 11.1/089 compilers

[Hans_J_]

Hi All,

I get

Illegal instruction

when I try to run a F90 code compiled with 11.1/089 ifort and linked to FFTW built

using the same compilers (although when the machine was booted in 32-bit mode).

I compile my code using

ifort -O3 -ipo -xHost -m64 -heap-arrays -openmp -assume byterecl -convert big_endian F4C_NS_FT_DE_TRIDIAG_OPENMP.f90 -L/usr/local/lib -lfftw3 -lfftw3_threads -liomp5 -lpthread

To run, I first

ulimit -s hard

export OMP_NUM_THREADS=1

(actually, the number of threads does not matter, 1 or more and I get the error).

This begins to happen once my arrays are large enough. I thought that the

-heap-arrays

took care of this issue, but alas. The machine (Mac pro) is currently booted into

64-bit mode.

Any ideas of how I get it to run a larger data size code?

Thanks, Hans

[Hans_J_]

Seems this is a stacksize issue that ulimit -s hard does not take care of. See the article

http://software.intel.com/en-us/articles/intel-fortran-compiler-increased-stack-usage-of-80-or-higher-compilers-causes-segmentation-fault/

which show how to increase stacksize in the compile line, i.e., include

-Wl,-stack_size,0x10000000

I'll have to figure out the size in hex ...