[Rd] gcc optimization flag when building R

[Vadim Ogranovich]

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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