R devel - Aug 2004 - gcc optimization flag when building R

Hi,
 
I am building R on RH Linux 7.3 and I noticed that ./configure does not
set the optimization flag, -O or -O2, for gcc, but does set for g++ and
g77. Why is that? Should I try to set it manually, if yes how?
 
Thanks,
Vadim
 
P.S. This is the bottom portion of the ./configure run
 
 
R is now configured for i686-pc-linux-gnu
 
  Source directory:          .
  Installation directory:    /usr/local
 
  C compiler:                gcc -D__NO_MATH_INLINES -mieee-fp -DNO_PURE
-Wchar-subscripts -Wformat -Wimplicit -Wreturn-type -Wswitch -Wreorder
-Wwrite-strings -Woverloaded-virtual -Wshadow -Wno-ctor-dtor-privacy
-m486 -fPIC -DOSRELMAJOR=2 -DOSRELMINOR=4
  C++ compiler:              g++ -mieee-fp -g -O2
  Fortran compiler:          g77 -mieee-fp -g -O2
 
  Interfaces supported:      X11, tcltk
  External libraries:        readline, BLAS(generic)
  Additional capabilities:   PNG, JPEG
  Options enabled:           R profiling
 
  Recommended packages:      yes


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"Vadim Ogranovich" <vograno@evafunds.com> writes:
> Hi,
>  
> I am building R on RH Linux 7.3 and I noticed that ./configure does not
> set the optimization flag, -O or -O2, for gcc, but does set for g++ and
> g77. Why is that? Should I try to set it manually, if yes how?
>  
> Thanks,
> Vadim
>  
> P.S. This is the bottom portion of the ./configure run
>  
>  
> R is now configured for i686-pc-linux-gnu
>  
>   Source directory:          .
>   Installation directory:    /usr/local
>  
>   C compiler:                gcc -D__NO_MATH_INLINES -mieee-fp -DNO_PURE
> -Wchar-subscripts -Wformat -Wimplicit -Wreturn-type -Wswitch -Wreorder
> -Wwrite-strings -Woverloaded-virtual -Wshadow -Wno-ctor-dtor-privacy
> -m486 -fPIC -DOSRELMAJOR=2 -DOSRELMINOR=4
>   C++ compiler:              g++ -mieee-fp -g -O2
>   Fortran compiler:          g77 -mieee-fp -g -O2
Something appears to be setting a load of CFLAGS that are not usually
there, though. If you have set CFLAGS on the make line or in a config.site
file, just include -g -O2 

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)             FAX: (+45) 35327907