In SCons manual:
=================
In order to inform the C compiler about the repositories, SCons will
add appropriate -I flags to the compilation commands for each directory
in the $CPPPATH list. So if we add the current directory to the
construction environment $CPPPATH like so:
env = Environment(CPPPATH = ['.'])
env.Program('hello.c')
Repository('/usr/repository1')
Then re-executing SCons yields:
% scons -Q
cc -o hello.o -c -I. -I/usr/repository1 hello.c
cc -o hello hello.o
=================
The additional include directory is definitely not what we want. Just
remove the additional Repository line.
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