Re: [RFC/POC] multiple CONFIG y/m/n

[Randy.Dunlap]

On Sat, 08 Apr 2006 00:04:26 +0900 OGAWA Hirofumi wrote:

> "Randy.Dunlap" <rdunlap@xxxxxxxxxxxx> writes:
> 
> > Comments?
> 
> Umm... Oh, how about the following?  It seems work...
> 
> 	$ perl -spi -e 's/CONFIG_SND.*//' .config
>         $ KCONFIG_ALLCONFIG=.config make allmodconfig or allyesconfig

Hrm, that points out a lack of documentation for this feature.

Would the kconfig/kbuild people prefer this documentation in the source
code (see below) or in Documentation/kbuild/somefile ?

---
---
 scripts/kconfig/conf.c |   22 ++++++++++++++++++++--
 1 files changed, 20 insertions(+), 2 deletions(-)

--- linux-2617-rc1.orig/scripts/kconfig/conf.c
+++ linux-2617-rc1/scripts/kconfig/conf.c
@@ -504,6 +504,24 @@ static void check_conf(struct menu *menu
 		check_conf(child);
 }
 
+void usage(char *progname)
+{
+	printf("%s [-o|-s|-d|-D|-n|-m|-y|-r] Kconfig_filename\n", progname);
+	printf("  -o: oldconfig: ask only about new config symbols\n");
+	printf("  -s: silentoldconfig: don't ask about any symbol values\n");
+	printf("  -d: defconfig: use default symbol values\n");
+	printf("  -D: use default symbol values from the specified config file\n");
+	printf("  -n: set unknown symbol values to 'n'\n");
+	printf("  -m: set unknown symbol values to 'm'\n");
+	printf("  -y: set unknown symbol values to 'y'\n");
+	printf("  -r: set unknown symbol values randomly to one of y/m/n\n");
+	printf("The n/m/y/r options can also use the environment variable KCONFIG_ALLCONFIG\n");
+	printf("  to specify a filename that contains config options that are\n");
+	printf("  to be set to a specific value.  Otherwise config checks for\n");
+	printf("  all{no,mod,yes,random}.config and all.config\n");
+	exit(0);
+}
+
 int main(int ac, char **av)
 {
 	int i = 1;
@@ -546,8 +564,8 @@ int main(int ac, char **av)
 			break;
 		case 'h':
 		case '?':
-			printf("%s [-o|-s] config\n", av[0]);
-			exit(0);
+			usage(av[0]);
+			break;
 		}
 	}
   	name = av[i];
-
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