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3 # Tests for the -D command line option, which defines global variables to the
4 # value 1, like in the C preprocessor.
8 # The variable has the exact value "1", not "1.0".
13 # The variable can be overwritten by assigning another value to it. This
14 # would not be possible if the variable had been specified on the command line
21 # The variable can be undefined. If the variable had been defined in the
22 # "Internal" or in the "Command" scope instead, undefining it would have no
29 # The C preprocessor allows to define a macro with a specific value. Make
30 # behaves differently, it defines a variable with the name 'VAR=value' and the