adding new compiler flags for IntelLLVM compilers (e.g., ifx)

Author: BenjaminTJohnson

cmake/compiler_flags_IntelLLVM_Fortran.cmake

@@ -0,0 +1,51 @@
+####################################################################
+# FLAGS COMMON TO ALL BUILD TYPES
+####################################################################
+
+set( CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -assume byterecl" )
+
+if( HAVE_AUTOPROFILE )
+  set( CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -finstrument-functions" )
+endif()
+
+####################################################################
+# RELEASE FLAGS
+####################################################################
+
+set( CMAKE_Fortran_FLAGS_RELEASE
+     "-O3 -unroll -inline-forceinline -no-heap-arrays -assume byterecl -qopenmp" )
+
+####################################################################
+# DEBUG FLAGS
+####################################################################
+
+set( CMAKE_Fortran_FLAGS_DEBUG
+     "-O0 -g -check bounds -traceback -warn all -no-heap-arrays -fpe0 -ftz -check all -assume byterecl -qopenmp" )
+
+####################################################################
+# RELWITHDEBINFO FLAGS
+####################################################################
+
+set( CMAKE_Fortran_FLAGS_RELWITHDEBINFO
+     "-g -O0 -traceback -fno-openmp" )
+#     "-O2 -g -DNDEBUG -check bounds -traceback -no-heap-arrays -assume byterecl -qopenmp" )
+
+####################################################################
+# BIT REPRODUCIBLE FLAGS
+####################################################################
+
+set( CMAKE_Fortran_FLAGS_BIT
+     "-O2 -no-heap-arrays -fp-model strict -assume byterecl -qopenmp" )
+
+####################################################################
+# LINK FLAGS
+####################################################################
+
+set( CMAKE_Fortran_LINK_FLAGS )
+
+####################################################################
+# Notes:
+# - `-qopenmp` enables OpenMP for `ifx`, including linking the necessary runtime
+# - For GPU offload: Add `-fopenmp-targets=spir64` (Intel GPU) or `-fopenmp-targets=nvptx64-nvidia-cuda` (NVIDIA)
+# - Reproducibility: `-fp-model strict` ensures bitwise results but may hurt perf
+# - Consider `-diag-disable=10448` if `ifx` emits unnecessary diagnostic noise

cmake/crtm_compiler_flags.cmake

@@ -1,28 +1,40 @@
-# (C) Copyright 2009-2016 ECMWF.
-# 
-# This software is licensed under the terms of the Apache Licence Version 2.0
-# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. 
-# In applying this licence, ECMWF does not waive the privileges and immunities 
-# granted to it by virtue of its status as an intergovernmental organisation nor
-# does it submit to any jurisdiction.
 
 if( NOT CMAKE_BUILD_TYPE MATCHES "Debug" )
   add_definitions( -DNDEBUG )
-endif( )
+endif()
 
 #######################################################################################
 # Fortran
 #######################################################################################
 
+message(STATUS "Compiler ID: ${CMAKE_Fortran_COMPILER_ID}")
+message(STATUS "Compiler: ${CMAKE_Fortran_COMPILER}")
+
+set(CMAKE_FORTRAN_STANDARD 08)
+set(CMAKE_FORTRAN_STANDARD_REQUIRED ON)
+set(CMAKE_FORTRAN_EXTENSIONS OFF)
+
 if( CMAKE_Fortran_COMPILER_ID MATCHES "GNU" )
   include( compiler_flags_GNU_Fortran )
+
 elseif( CMAKE_Fortran_COMPILER_ID MATCHES "Intel" )
-  include( compiler_flags_Intel_Fortran )
+  if( CMAKE_Fortran_COMPILER MATCHES ".*ifx.*" )
+    message(STATUS "Detected Intel ifx (LLVM-based) Fortran compiler")
+    include( compiler_flags_IntelLLVM_Fortran )  # <-- new file for ifx
+  else()
+    message(STATUS "Detected Intel ifort (classic) Fortran compiler")
+    include( compiler_flags_Intel_Fortran )
+  endif()
+
+elseif( CMAKE_Fortran_COMPILER_ID MATCHES "PGI" OR CMAKE_Fortran_COMPILER_ID MATCHES "NVHPC" )
+  include( compiler_flags_NVHPC_Fortran )
+
 elseif( CMAKE_Fortran_COMPILER_ID MATCHES "XL" )
   include( compiler_flags_XL_Fortran )
+
 elseif( CMAKE_Fortran_COMPILER_ID MATCHES "Cray" )
   include( compiler_flags_Cray_Fortran )
+
 else()
-  message( STATUS "Fortran compiler with ID ${CMAKE_CXX_COMPILER_ID} will be used with CMake default options")
+  message( STATUS "Fortran compiler with ID ${CMAKE_Fortran_COMPILER_ID} will be used with CMake default options")
 endif()
-