kconfig/conf: add command line options' description

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>

diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 6431f5c004d96a62bf442a05d4c12c6adac3ca58..819ab18961febba879b07812c071d81df7741642 100644 (file)
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -457,8 +457,28 @@ static struct option long_opts[] = {
        {NULL, 0, NULL, 0}
 };
 
+static void conf_usage(const char *progname)
+{
+
+       printf("Usage: %s [option] <kconfig-file>\n", progname);
+       printf("[option] is _one_ of the following:\n");
+       printf("  --listnewconfig         List new options\n");
+       printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
+       printf("  --oldconfig             Update a configuration using a provided .config as base\n");
+       printf("  --silentoldconfig       Same as oldconfig, but quietly, additionally update deps\n");
+       printf("  --oldnoconfig           Same as silentoldconfig but set new symbols to no\n");
+       printf("  --defconfig <file>      New config with default defined in <file>\n");
+       printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
+       printf("  --allnoconfig           New config where all options are answered with no\n");
+       printf("  --allyesconfig          New config where all options are answered with yes\n");
+       printf("  --allmodconfig          New config where all options are answered with mod\n");
+       printf("  --alldefconfig          New config with all symbols set to default\n");
+       printf("  --randconfig            New config with random answer to all options\n");
+}
+
 int main(int ac, char **av)
 {
+       const char *progname = av[0];
        int opt;
        const char *name, *defconfig_file = NULL /* gcc uninit */;
        struct stat tmpstat;
@@ -492,14 +512,24 @@ int main(int ac, char **av)
                        srand(seed);
                        break;
                }
+               case oldaskconfig:
+               case oldconfig:
+               case allnoconfig:
+               case allyesconfig:
+               case allmodconfig:
+               case alldefconfig:
+               case listnewconfig:
+               case oldnoconfig:
+                       break;
                case '?':
-                       fprintf(stderr, _("See README for usage info\n"));
+                       conf_usage(progname);
                        exit(1);
                        break;
                }
        }
        if (ac == optind) {
                printf(_("%s: Kconfig file missing\n"), av[0]);
+               conf_usage(progname);
                exit(1);
        }
        name = av[optind];