kconfig: support simply expanded variable

[carl9170fw.git] / config / zconf.l

diff --git a/config/zconf.l b/config/zconf.l
index fde86ba2d0372c3e91713db262adff7b9fa705f1..d0f5b132a9b39802680a3f07343d0c36bf83e4ee 100644 (file)
--- a/config/zconf.l
+++ b/config/zconf.l
@@ -1,12 +1,13 @@
 %option nostdinit noyywrap never-interactive full ecs
 %option 8bit nodefault yylineno
-%x COMMAND HELP STRING PARAM
+%x COMMAND HELP STRING PARAM ASSIGN_VAL
 %{
 /*
  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  * Released under the terms of the GNU GPL v2.0.
  */
 
+#include <assert.h>
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -111,8 +112,11 @@ n  [A-Za-z0-9_-]
                }
                alloc_string(yytext, yyleng);
                yylval.string = text;
-               return T_WORD;
+               return T_VARIABLE;
        }
+       "="     { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_RECURSIVE; return T_ASSIGN; }
+       ":="    { BEGIN(ASSIGN_VAL); yylval.flavor = VAR_SIMPLE; return T_ASSIGN; }
+       [[:blank:]]+
        .       warn_ignored_character(*yytext);
        \n      {
                BEGIN(INITIAL);
@@ -120,6 +124,16 @@ n  [A-Za-z0-9_-]
        }
 }
 
+<ASSIGN_VAL>{
+       [^[:blank:]\n]+.*       {
+               alloc_string(yytext, yyleng);
+               yylval.string = text;
+               return T_ASSIGN_VAL;
+       }
+       \n      { BEGIN(INITIAL); return T_EOL; }
+       .
+}
+
 <PARAM>{
        "&&"    return T_AND;
        "||"    return T_OR;