GCC specifies that the last option takes effect on the command line. Its 
common practice to append CFLAGS to override earlier ones. So gcc -O3 -O2 
-O0 source.c compiles without optimization.


On Saturday, September 22, 2012 11:29:07 AM UTC+1, P Purkayastha wrote:
>
> Hi,
>   Is there any way to change or remove all the compilation flags provided 
> to gcc while compiling cython code in Sage? Currently, I have a setup.py 
> file and I am running
> sage -python setup.py build_ext --inplace
> to compile cython code.
>
> I tried providing custom CFLAGS, like CFLAGS="-O0", but it seems to only 
> get appended to the gcc command. I also tried exporting OPTS="" (found this 
> advice for python in a stackoverflow thread) but that doesn't seem to help. 
> Also tried the above in a "sage -sh" environment and then calling python 
> directly.
>

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