## GCC version (commented out)
## filein  = -I/usr/include -I/usr/lib/x86_64-linux-gnu/mpich/include -I/usr/lib/x86_64-linux-gnu/openmpi/lib/ -I/usr/lib/gcc/x86_64-linux-gnu/11/ -I/usr/include/c++/11/
## filein  = -I/usr/include/ -I/usr/include/openmpi-x86_64/ -I/usr/lib/x86_64-linux-gnu/openmpi/include/ -I/usr/lib/x86_64-linux-gnu/openmpi/lib/ -I/usr/lib/gcc/x86_64-linux-gnu/11/ -I/usr/include/c++/11/
## LDLIBS  = -L/usr/lib/x86_64-linux-gnu -L/usr/lib64 -L/usr/lib/gcc/x86_64-linux-gnu/11 -lgfortran -lmpi -lgfortran

## Intel oneAPI version with oneMKL (Optimized for performance)
filein  = -I/usr/include/ -I${MKLROOT}/include

## Using multi-threaded MKL for better scalability with MPI
## This allows MKL functions (FFT, BLAS, LAPACK) to use multiple threads internally
## while keeping the application code as pure MPI (no OpenMP pragmas in user code)
LDLIBS  = -L/usr/lib/x86_64-linux-gnu -L/usr/lib64 -lifcore -limf -lmpi \
          -L${MKLROOT}/lib -lmkl_intel_lp64 -lmkl_intel_thread -lmkl_core \
          -liomp5 -lpthread -lm -ldl

## Aggressive optimization flags for maximum performance:
## -O3: Maximum optimization level
## -xHost: Optimize for the host CPU architecture (Intel/AMD compatible)
## -fp-model fast=2: Aggressive floating-point optimizations (allows reassociation)
## -fma: Enable fused multiply-add instructions
## -qopt-report=5: Generate detailed optimization reports
## -qopt-report-phase=vec,loop: Report vectorization and loop optimizations
## -march=native: Use all available CPU instructions
## -mtune=native: Tune for the specific CPU
## -funroll-loops: Aggressively unroll loops
## -fno-alias: Assume no pointer aliasing (safe for Fortran arrays)
## -qopt-prefetch: Enable aggressive prefetching
## Note: OpenMP has been disabled (-qopenmp removed) due to performance issues
CXXAPPFLAGS  = -O3 -xHost -march=native -mtune=native -fp-model fast=2 -fma \
               -qopt-report=5 -qopt-report-phase=vec,loop \
               -funroll-loops -fno-alias -qopt-prefetch \
               -Dfortran3 -Dnewc -I${MKLROOT}/include
f90appflags  = -O3 -xHost -march=native -mtune=native -fp-model fast=2 -fma \
               -qopt-report=5 -qopt-report-phase=vec,loop \
               -funroll-loops -fno-alias -qopt-prefetch \
               -fpp -I${MKLROOT}/include
f90          = ifx
f77          = ifx
CXX          = icpx
CC           = icx
CLINKER      = mpiicpx 

Cu = nvcc
CUDA_LIB_PATH = -L/usr/lib/cuda/lib64 -I/usr/include -I/usr/lib/cuda/include
#CUDA_APP_FLAGS = -c -g -O3 --ptxas-options=-v -arch compute_13 -code compute_13,sm_13 -Dfortran3 -Dnewc
CUDA_APP_FLAGS = -c -g -O3 --ptxas-options=-v -Dfortran3 -Dnewc