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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-03-23 02:00:14 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-03-26 02:04:07 +0900
commit18492685e479fd4d8e1dca836f57c11b6800f083 (patch)
treeaab2d26d2fef07d1b5009645ca16c766e4f7c90d /scripts/kconfig/lkc.h
parent379a8eb8eb1a55344e1cf976fa589a12c68b60a7 (diff)
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kconfig: use yylineno option instead of manual lineno increments
Tracking the line number by hand is error-prone since you need to increment it in every \n matching pattern. If '%option yylineno' is set, flex defines 'yylineno' to contain the current line number and automatically updates it each time it reads a \n character. This is much more convenient although the lexer does not initializes yylineno, so you need to set it to 1 each time you start reading a new file, and restore it you go back to the previous file. I tested this with DEBUG_PARSE, and confirmed the same dump message was produced. I removed the perf-report option. Otherwise, I see the following message: %option yylineno entails a performance penalty ONLY on rules that can match newline characters Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/kconfig/lkc.h')
-rw-r--r--scripts/kconfig/lkc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 2d5ec2d0e952..f4394af6e4b8 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -68,6 +68,7 @@ struct kconf_id {
enum symbol_type stype;
};
+extern int yylineno;
void zconfdump(FILE *out);
void zconf_starthelp(void);
FILE *zconf_fopen(const char *name);