installing Shapely without geos_c

gistfile1.txt

# This is what happens when I `sudo pip install Shapely`.
# (Shapely is best if you have libgeos_c, but you can install without it.)

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$> sudo pip install Shapely
  ...
  ( yada yada yada, setup.py egg_info -> setup.py install for Shapely )
  ( then after installation, we get this message: )
  ...
clang: warning: argument unused during compilation: '-mno-fused-madd'
    shapely/speedups/_speedups.c:235:10: fatal error: 'geos_c.h' file not found
    #include "geos_c.h"
             ^
    1 error generated.
    command 'clang' failed with exit status 1
    Warning: The C extension could not be compiled, speedups are not enabled.
    Failure information, if any, is above.
    I'm retrying the build without the C extension now.
    
    Warning: The C extension could not be compiled, speedups are not enabled.
    Plain-Python installation succeeded.
Successfully installed Shapely
Cleaning up...
$> 
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