flexible GMRES from ITSOL developed by Yousef Saad.  
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| void | cdotc_ (complex *, int *, complex[], int *, complex[], int *) | 
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| float | scnrm2_ (int *, complex[], int *) | 
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| int | cfgmr (int n, void(*cmatvec)(complex, complex[], complex, complex[]), void(*cpsolve)(int, complex[], complex[]), complex *rhs, complex *sol, double tol, int im, int *itmax, FILE *fits) | 
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          | int cfgmr | ( | int | n, | 
        
          |  |  | void(*)(complex, complex[], complex, complex[]) | cmatvec, | 
        
          |  |  | void(*)(int, complex[], complex[]) | cpsolve, | 
        
          |  |  | complex * | rhs, | 
        
          |  |  | complex * | sol, | 
        
          |  |  | double | tol, | 
        
          |  |  | int | im, | 
        
          |  |  | int * | itmax, | 
        
          |  |  | FILE * | fits | 
        
          |  | ) |  |  | 
      
 
 
      
        
          | float scnrm2_ | ( | int * | , | 
        
          |  |  | complex | [], | 
        
          |  |  | int * |  | 
        
          |  | ) |  |  |