From ed2a22f277c60308481ecea1e1b846cbf249af41 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Mon, 28 May 2018 18:21:51 +0900 Subject: kconfig: support append assignment operator Support += operator. This appends a space and the text on the righthand side to a variable. The timing of the evaluation of the righthand side depends on the flavor of the variable. If the lefthand side was originally defined as a simple variable, the righthand side is expanded immediately. Otherwise, the expansion is deferred. Appending something to an undefined variable results in a recursive variable. To implement this, we need to remember the flavor of variables. Signed-off-by: Masahiro Yamada --- scripts/kconfig/zconf.l | 1 + 1 file changed, 1 insertion(+) (limited to 'scripts/kconfig/zconf.l') diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l index 376af6cf2f65..a6cbe2d06d01 100644 --- a/scripts/kconfig/zconf.l +++ b/scripts/kconfig/zconf.l @@ -116,6 +116,7 @@ n [A-Za-z0-9_-] } "=" { 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; } [[:blank:]]+ . warn_ignored_character(*yytext); \n { -- cgit v1.2.3