[RFD] kconfig - introduce cond-source
From: Sam Ravnborg (sam_at_ravnborg.org)
Date: 07/31/05
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Date: Sun, 31 Jul 2005 00:01:00 +0200 To: Roman Zippel <zippel@linux-m68k.org>, kbuild-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Hi Roman.
In a couple of cases I have had the need to include a Kconfig file only
if present.
The current 'source' directive works as one would expect. It bails out
if the file is missing.
Examples where I have missed cond-source:
- klibc work
- external modules
Sam
Patch below implement a cond-source.
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -39,6 +39,7 @@ void zconf_starthelp(void);
FILE *zconf_fopen(const char *name);
void zconf_initscan(const char *name);
void zconf_nextfile(const char *name);
+void zconf_try_nextfile(const char *name);
int zconf_lineno(void);
char *zconf_curname(void);
diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
--- a/scripts/kconfig/zconf.l
+++ b/scripts/kconfig/zconf.l
@@ -91,6 +91,7 @@ n [A-Za-z0-9_]
"mainmenu" BEGIN(PARAM); return T_MAINMENU;
"menu" BEGIN(PARAM); return T_MENU;
"endmenu" BEGIN(PARAM); return T_ENDMENU;
+ "cond-source" BEGIN(PARAM); return T_CONDSOURCE;
"source" BEGIN(PARAM); return T_SOURCE;
"choice" BEGIN(PARAM); return T_CHOICE;
"endchoice" BEGIN(PARAM); return T_ENDCHOICE;
@@ -299,18 +300,14 @@ void zconf_initscan(const char *name)
current_file->flags = FILE_BUSY;
}
-void zconf_nextfile(const char *name)
+static void zconf_switch_buffer(const char *name, FILE *filp)
{
struct file *file = file_lookup(name);
struct buffer *buf = malloc(sizeof(*buf));
memset(buf, 0, sizeof(*buf));
current_buf->state = YY_CURRENT_BUFFER;
- yyin = zconf_fopen(name);
- if (!yyin) {
- printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name);
- exit(1);
- }
+ yyin = filp;
yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
buf->parent = current_buf;
current_buf = buf;
@@ -329,6 +326,27 @@ void zconf_nextfile(const char *name)
current_file = file;
}
+void zconf_nextfile(const char *name)
+{
+ FILE *filp;
+
+ filp = zconf_fopen(name);
+ if (!filp) {
+ printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name);
+ exit(1);
+ }
+ zconf_switch_buffer(name, filp);
+}
+
+void zconf_try_nextfile(const char *name)
+{
+ FILE *filp;
+
+ filp = zconf_fopen(name);
+ if (filp)
+ zconf_switch_buffer(name, filp);
+}
+
static struct buffer *zconf_endfile(void)
{
struct buffer *parent;
diff --git a/scripts/kconfig/zconf.y b/scripts/kconfig/zconf.y
--- a/scripts/kconfig/zconf.y
+++ b/scripts/kconfig/zconf.y
@@ -44,6 +44,7 @@ static struct menu *current_menu, *curre
%token T_MENU
%token T_ENDMENU
%token T_SOURCE
+%token T_CONDSOURCE
%token T_CHOICE
%token T_ENDCHOICE
%token T_COMMENT
@@ -378,15 +379,22 @@ menu_block:
source: T_SOURCE prompt T_EOL
{
- $$ = $2;
printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
+ zconf_nextfile($2);
};
-source_stmt: source
+condsource: T_CONDSOURCE prompt T_EOL
{
- zconf_nextfile($1);
+ printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
+ zconf_try_nextfile($2);
};
+source_stmt:
+ source
+ | condsource
+ /* empty */
+;
+
/* comment entry */
comment: T_COMMENT prompt T_EOL
-
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