OPTFLAGS during compilation, make problem

[Riccardo Mottola]

Hi,

I'm trying to build base without optimizations. Usually it is a matter 
of saying debug=yes at make and/or setting -Ox directly in our 
Library/Makefiles/config.make to be super-sure.

I lost half an afternoon and I still got gui compiled with -O2. The 
command line I get is:

clang NSAffineTransform.m -c \
      -MMD -MP -DGNUSTEP_TARGET_DIR=\".\" -DGNUSTEP_TARGET_CPU=\"ix86\" 
-DGNUSTEP_TARGET_OS=\"freebsd\" -DLIBRARY_COMBO=\"gnu-gnu-gnu\" 
-DBACKEND_BUNDLE=1 -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 
-DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 
-fno-strict-aliasing -fexceptions -fobjc-exceptions 
-D_NATIVE_OBJC_EXCEPTIONS -pthread -fPIC -Wall -DGSWARN -DGSDIAGNOSE 
-Wno-import -g -O0 -fgnu-runtime -Wall 
-fconstant-string-class=NSConstantString -fstack-protector-all 
-I/usr/local/include/libpng -O2 -pipe -march=prescott 
-fno-strict-aliasing -I../Headers/Additions -I../Headers -I./. -I. 
-I/usr/local/include -I/home/multix/GNUstep/Library/Headers 
-I/Local/Library/Headers -I/System/Library/Headers \
       -o obj/libgnustep-gui.obj/NSAffineTransform.m.o

What looks out of place is:
-fstack-protector-all -I/usr/local/include/libpng -O2 -pipe 
-march=prescott -fno-strict-aliasing

I have a hint what it is coming from: i'd never optimize for "prescott" 
a "core" processor.. even if it is written around that it should be the 
same, it feels just wrong... internet wisdom. I never wrote "prescott".

However look here.
> libpng-config --cflags
-I/usr/local/include/libpng -O2 -pipe -march=prescott -fno-strict-aliasing


I think that our "filter out" is not working properly or should filter 
out all instances of the optimization flags if there is more than one.

Riccardo