• Masahiro Yamada's avatar
    kconfig: support append assignment operator · ed2a22f2
    Masahiro Yamada authored
    Support += operator.  This appends a space and the text on the
    righthand side to a variable.
    
    The timing of the evaluation of the righthand side depends on the
    flavor of the variable.  If the lefthand side was originally defined
    as a simple variable, the righthand side is expanded immediately.
    Otherwise, the expansion is deferred.  Appending something to an
    undefined variable results in a recursive variable.
    
    To implement this, we need to remember the flavor of variables.
    Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
    ed2a22f2
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