Re: weird g77 and gfortran

In article <68tm60F2utvhrU1@[EMAIL PROTECTED]
>,
	Ingo Thies <ingo.thies@[EMAIL PROTECTED]
> writes:
> 
> However, some old third-party codes contain statements from F77 standard

> that are invalid in gfortran (e.g. the ugly PAUSE statement), thus 
> causing gfortran to output a screen full of warnings.
> 

gfortran sup****ts all standard Fortran 77 features.  If it doesn't 
sup****t a feature, please file a bug re****t.  Receiving a warning
does not mean the Fortran 77 feature isn't sup****ted.  It typically
means the Fortran 90/95/03 standards have marked the feature as
either obsolescent or deleted.  gfortran is simply informing you of
this development.  If you don't want to see warnings, use the -w
option.

 PS: There is no -O4 option.  The highest optimization level is 3.
PPS: With gfortran I'd suggested '-O2 -funroll-loops -march=native'
     as the compilation options.  If you want additional speed at
     the expense of correctness add -ffast-math.  Also, note -O3
     should have only a minimal impact on your code because it
     turns on more agressive in-lining, and gfortran only in-lines
     CONTAINed subprograms.

-- 
Steve
http://troutmask.apl.wa****ngton.edu/~kargl/