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Subject[PATCH 15/30] kconfig: expand lefthand side of assignment statement
Date
Make allows variable references in the lefthand side of assignment.

X = A
Y = B
$(X)$(Y) = 1

This does 'AB = 1' Do likewise in Kconfig as well.

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

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 c68ca56b..ae33e9b 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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