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    Subject[PATCH v5 15/31] kconfig: expand lefthand side of assignment statement
    Date
    Make expands the lefthand side of assignment statements.  In fact,
    Kbuild relies on it since kernel makefiles mostly look like this:

    obj-$(CONFIG_FOO) += foo.o

    Do likewise in Kconfig.

    Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
    ---

    Changes in v5: None
    Changes in v4: None
    Changes in v3: None
    Changes in v2: None

    scripts/kconfig/zconf.l | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
    index a6cbe2d..25bd2b8 100644
    --- a/scripts/kconfig/zconf.l
    +++ b/scripts/kconfig/zconf.l
    @@ -114,6 +114,13 @@ n [A-Za-z0-9_-]
    yylval.string = text;
    return T_VARIABLE;
    }
    + ({n}|$)+ {
    + /* this token includes at least one '$' */
    + yylval.string = expand_token(yytext, yyleng);
    + if (strlen(yylval.string))
    + return T_VARIABLE;
    + free(yylval.string);
    + }
    "=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; }
    ":=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; }
    "+=" { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_APPEND; return T_ASSIGN; }
    --
    2.7.4
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