All the compilers/flags and variables can be changed in test/example[1-3]/makenek
Set the F77/CC compilers
# Fortran compiler
F77="mpiifort"
# C compiler
CC="mpiicc"
uncomment out the variable "IFSIMD"
# Enable SIMD (default false)
#IFSIMD="true"
uncomment out the variable "IFXSMM"
# Enable XSMM (default false)
#IFXSMM="true"
In the case, include paths and linked libraries can be set
USR_INCDIR="..."
USR_LDFLAGS="..."
the polynomial order and the number of elements per core can be changed in the file SIZE
$ cd test
$ ./makenek clean
$ ./makenek test
$ mpirun -n ./nekbone