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[v5,15/31] kconfig: expand lefthand side of assignment statement

Message ID 1527499328-13213-16-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit 82bc8bd82e5c4e6e53d4ba20bb89cec6a91d8702
Headers show
Series kconfig: move compiler capability tests to Kconfig | expand

Commit Message

Masahiro Yamada May 28, 2018, 9:21 a.m. UTC 
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(+)

-- 
2.7.4
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Patch

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; }