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kconfig: expand lefthand side of assignment statement 

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>
This commit is contained in:
Masahiro Yamada 2018-05-28 18:21:52 +09:00
parent ed2a22f277
commit 82bc8bd82e
1 changed files with 7 additions and 0 deletions
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7
scripts/kconfig/zconf.l
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@ -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; }