ecbuild_compile_options

Defined variables describing compiler options for the current compiler.

Fortran:

  • ECBUILD_Fortran_COMPILE_OPTIONS_REAL4 : Convert all unqualified REALs to 32 bit (single precision)

  • ECBUILD_Fortran_COMPILE_OPTIONS_REAL8 : Convert all unqualified REALs to 64 bit (double precision)

  • ECBUILD_Fortran_COMPILE_OPTIONS_CHECK_BOUNDS : Bounds checking compile options

  • ECBUILD_Fortran_COMPILE_OPTIONS_INIT_SNAN : Compile options to initialize REAL’s with signaling NaN

  • ECBUILD_Fortran_COMPILE_OPTIONS_FPE_TRAP : Compile options to trap floating-point-exceptions

Example use:

  1. Application to entire scope

    ecbuild_add_fortran_flags( ${ECBUILD_Fortran_COMPILE_OPTIONS_REAL8} )

  2. Application to a target with mixed language source files

    target_compile_options(my_target PUBLIC

    $<$<COMPILE_LANGUAGE:Fortran>:${ECBUILD_Fortran_COMPILE_OPTIONS_REAL8}>)

    # A generator expression is required here to only apply the flags to Fortran files in the target. # This is only needed if it is a mixed-language target.

  3. On a per source file basis

    set_property(SOURCE my_source.F90

    APPEND PROPERTY COMPILE_OPTIONS ${ECBUILD_Fortran_COMPILE_OPTIONS_REAL8})

ecbuild_define_compile_options

Define a compile_option for a given compiler ID and language

ecbuild_define_compile_options( NAME <name> DESCRIPTION <description> LANGUAGE <language> [ REQUIRED ]
                                [ GNU <values> ] [ NEC <values> ] [ NVHPC <values> ] [ Intel <values> ]
                                [ IntelLLVM <values> ] [ Cray <values> ] [ Flang <values> ] [ NAG <values> ] 
                                [ LLVMFlang <values> ] )

Options

NAME <name> :

The name given to compile_option

DESCRIPTION <description> :

The description of compile_option

LANGUAGE <language> :

The compiler language the compile_options apply to

GNU <values>optional

The values for the compile option for GNU compiler and given LANGUAGE

NEC <values>optional

The values for the compile option for NEC compiler and given LANGUAGE

NVHPC <values>optional

The values for the compile option for NVHPC compiler and given LANGUAGE

Intel <values>optional

The values for the compile option for Intel compiler and given LANGUAGE

IntelLLVM <values>optional

The values for the compile option for IntelLLVM compiler and given LANGUAGE

Cray <values>optional

The values for the compile option for Cray compiler and given LANGUAGE

Flang <values>optional

The values for the compile option for Flang compiler and given LANGUAGE

NAG <values>optional

The values for the compile option for NAG compiler and given LANGUAGE

LLVMFlang <values>optional

The values for the compile option for LLVM Flang compiler and given LANGUAGE

REQUIREDoptional

fail if the compile_options for the current compiler are not implemented, to avoid nasty surpises