From: ldo@nz.invalid   
      
   On Thu, 2 Jan 2025 02:27:54 -0600, Lynn McGuire wrote:   
      
   > How do you send a fortran character string from GCC to GFortran ?   
      
   Seems like trying to call Fortran routines from C is not quite   
   straightforward. Looking at the (draft?) Fortran 2023 spec, page 514 says:   
      
       In a reference from C to a Fortran procedure with an interoperable   
       interface, a C actual argument shall be the address of a C   
       descriptor for the intended effective argument if the   
       corresponding dummy argument interoperates with a C formal   
       parameter that is a pointer to CFI_cdesc_t.   
      
   The following section (page 516 onwards) defines these “C descriptors”. Or   
   alternatively (back to page 514), you might need to declare your Fortran   
   routine with the “BIND(C)” attribute.   
      
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