Do not include cpppath/extrapath/libpath when generating output location

Otherwise, if libraries are used which have deeper paths, the ouput path
becomes really long and builds fail due to excessively long command line.

Author: kaloianm

SConstruct

@@ -210,12 +210,12 @@ add_option( "cxx-use-shell-environment", "use $CXX from shell for C++ compiler"
 add_option( "ld", "linker to use" , 1 , True )
 add_option( "c++11", "enable c++11 support (experimental)", 0, True )
 
-add_option( "cpppath", "Include path if you have headers in a nonstandard directory" , 1 , True )
-add_option( "libpath", "Library path if you have libraries in a nonstandard directory" , 1 , True )
+add_option( "cpppath", "Include path if you have headers in a nonstandard directory" , 1 , False )
+add_option( "libpath", "Library path if you have libraries in a nonstandard directory" , 1 , False )
 
-add_option( "extrapath", "comma separated list of add'l paths  (--extrapath /opt/foo/,/foo) static linking" , 1 , True )
-add_option( "extrapathdyn", "comma separated list of add'l paths  (--extrapath /opt/foo/,/foo) dynamic linking" , 1 , True )
-add_option( "extralib", "comma separated list of libraries  (--extralib js_static,readline" , 1 , True )
+add_option( "extrapath", "comma separated list of add'l paths  (--extrapath /opt/foo/,/foo) static linking" , 1 , False )
+add_option( "extrapathdyn", "comma separated list of add'l paths  (--extrapath /opt/foo/,/foo) dynamic linking" , 1 , False )
+add_option( "extralib", "comma separated list of libraries  (--extralib js_static,readline" , 1 , False )
 
 add_option( "no-glibc-check" , "don't check for new versions of glibc" , 0 , False )