linux-kernel - [PATCH 16/30] kconfig: add 'info' and 'warning' built-in functions

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Date:   Fri, 13 Apr 2018 14:06:25 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-kbuild@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Ulf Magnusson <ulfalizer@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Emese Revfy <re.emese@...il.com>, x86@...nel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 16/30] kconfig: add 'info' and 'warning' built-in functions

Add 'info' and 'warning' functions as in Make.

They print messages during parsing Kconfig files, which is useful
when debugging Kconfig at least.

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

Changes in v3: None
Changes in v2: None

 scripts/kconfig/preprocess.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/scripts/kconfig/preprocess.c b/scripts/kconfig/preprocess.c
index 85972fb..f8d06d9 100644
--- a/scripts/kconfig/preprocess.c
+++ b/scripts/kconfig/preprocess.c
@@ -203,6 +203,19 @@ static char *join_args(int argc, char *argv[])
 	return out;
 }
 
+static char *do_info(int argc, char *argv[])
+{
+	char *msg;
+
+	msg = join_args(argc, argv);
+
+	printf("%s\n", msg);
+
+	free(msg);
+
+	return xstrdup("");
+}
+
 static char *do_shell(int argc, char *argv[])
 {
 	FILE *p;
@@ -244,8 +257,23 @@ static char *do_shell(int argc, char *argv[])
 	return xstrdup(buf);
 }
 
+static char *do_warning(int argc, char *argv[])
+{
+	char *msg;
+
+	msg = join_args(argc, argv);
+
+	fprintf(stderr, "%s:%d: %s\n", current_file->name, yylineno, msg);
+
+	free(msg);
+
+	return xstrdup("");
+}
+
 static const struct function function_table[] = {
+	{ .name = "info", .func = do_info },
 	{ .name = "shell", .func = do_shell },
+	{ .name = "warning", .func = do_warning },
 };
 
 static char *function_call(const char *name, int argc, char *argv[])
-- 
2.7.4