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ACCESS-NRI / ACCESS-OM2

ACCESS-OM2: ACCESS Ocean-Sea Ice Model
Apache License 2.0
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Level of Compiler Optimisation? #9

Closed harshula closed 1 year ago

harshula commented 1 year ago

We need a policy regarding what level of compiler optimisation is acceptable. -O3 might be too aggressive.

libaccessom2/CMakeLists.txt:

# compiler flags for gfortran
if(CMAKE_Fortran_COMPILER_ID MATCHES GNU)
  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -std=f2008 -Wall -fdefault-real-8 -ffpe-trap=invalid,zero,overflow")
  set(CMAKE_Fortran_FLAGS_DEBUG "-O0 -g -pg -fbounds-check -fbacktrace")
  set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
endif()

# compiler flags for ifort
if(CMAKE_Fortran_COMPILER_ID MATCHES Intel)
  set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -r8 -fpe0 -fp-model precise -fp-model source -align all -traceback")
  set(CMAKE_Fortran_FLAGS_DEBUG "-g3 -O0 -check all")
  set(CMAKE_Fortran_FLAGS_RELEASE "-g3 -O2 -axCORE-AVX2 -debug all -check none -qopt-report=5 -qopt-report-annotate")
endif()
harshula commented 1 year ago

Duplicate of https://github.com/ACCESS-NRI/ACCESS-OM/issues/12