[PATCH v4 14/31] kconfig: expand lefthand side of assignment statement

Masahiro Yamada
2018-05-17T06:19:37Z

Make expands the lefthand side of assignment statements. In fact,
Kbuild relies on it since kernel makefiles mostly look like follows:

obj-$(CONFIG_FOO) += foo.o

Do likewise in Kconfig.

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

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 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