[R-SIG-Mac] Optimization flags for G5 and G4

Simon Urbanek simon.urbanek at r-project.org
Sat Apr 23 01:35:15 CEST 2005


On Apr 22, 2005, at 4:07 PM, gene wrote:

> gcc version 4.0.0-autovect 20050128 (experimental, autovect- 
> merge-20041213)
> > g77 -v
> gcc version 3.4.2
> Should I be worried that it mentions a different gcc version?

Yes. You will need to download the corresponding gfortran from the  
gcc4 suite (also available on the hpc pages).

> Finally, after running ./configure --with-blas='-framework vecLib'  
> --with-lapack --with-aqua I get:
> WARNING: g77 and gcc disagree on int and double

gcc3 (and hence your g77) has no G5 support - you need gcc4 in order  
to get optimized binaries.


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