[PATCH v4 17/31] kconfig: add 'filename' and 'lineno' built-in variables

Masahiro Yamada
2018-05-17T06:19:16Z

The special variables, $(filename) and $(lineno), are expanded to a
file name and its line number being parsed, respectively.

Suggested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

Changes in v4:
- Newly added

Changes in v3: None
Changes in v2: None

scripts/kconfig/preprocess.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/scripts/kconfig/preprocess.c b/scripts/kconfig/preprocess.c
index 88844a7..c39e30e 100644
--- a/scripts/kconfig/preprocess.c
+++ b/scripts/kconfig/preprocess.c
@@ -111,6 +111,11 @@ static char *do_error(int argc, char *argv[], int old_argc, char *old_argv[])
return NULL;
}

+static char *do_filename(int argc, char *argv[], int old_argc, char *old_argv[])
+{
+ return xstrdup(current_file->name);
+}
+
static char *do_if(int argc, char *argv[], int old_argc, char *old_argv[])
{
char *cond, *p, *res;
@@ -144,6 +149,15 @@ static char *do_info(int argc, char *argv[], int old_argc, char *old_argv[])
return xstrdup("");
}

+static char *do_lineno(int argc, char *argv[], int old_argc, char *old_argv[])
+{
+ char buf[16];
+
+ sprintf(buf, "%d", yylineno);
+
+ return xstrdup(buf);
+}
+
static char *do_shell(int argc, char *argv[], int old_argc, char *old_argv[])
{
FILE *p;
@@ -194,8 +208,10 @@ static char *do_warning(int argc, char *argv[], int old_argc, char *old_argv[])
static const struct function function_table[] = {
/* Name MIN MAX EXP? Function */
{ "error", 1, 1, true, do_error },
+ { "filename", 0, 0, false, do_filename },
{ "if", 2, 3, false, do_if },
{ "info", 1, 1, true, do_info },
+ { "lineno", 0, 0, false, do_lineno },
{ "shell", 1, 1, true, do_shell },
{ "warning", 1, 1, true, do_warning },
};
--
2.7.4