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kconfig: implement KCONFIG_PROBABILITY for rand{,package}config

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rand{,package}config enables configuration options with 50% probability,
which isn't always what we want in BR (because the "big" configs take a
long time to build and limits the chance of a randconfig detecting a
missing dependency), so introduce a KCONFIG_PROBABILITY environment
variable to tweak the probability between 0 (all options off) and 100
(all options on).

To use, simply set the environment variable before running make or pass
it on the make command line - E.G.

make randpackageconfig KCONFIG_PROBABILITY=10

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Peter Korsgaard
2010-07-23 14:15:18 +02:00
parent f4800b4654
commit 3435c1afb5
1 changed files with 19 additions and 3 deletions
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22
package/config/confdata.c
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@@ -845,7 +845,16 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
struct symbol *sym, *csym;
struct property *prop;
struct expr *e;
int i, cnt, def;
int i, cnt, def, prob = 50;
if (mode == def_random) {
char *endp, *env = getenv("KCONFIG_PROBABILITY");
if (env && *env) {
int tmp = (int)strtol(env, &endp, 10);
if (*endp == '\0' && tmp >= 0 && tmp <= 100)
prob = tmp;
}
}
for_all_symbols(i, sym) {
if (sym_has_value(sym))
@@ -864,8 +873,15 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
sym->def[S_DEF_USER].tri = no;
break;
case def_random:
cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
cnt = (rand() % 100) - (100 - prob);
if (cnt < 0)
sym->def[S_DEF_USER].tri = no;
else
if ((sym_get_type(sym) == S_TRISTATE)
&& (cnt > prob/2))
sym->def[S_DEF_USER].tri = mod;
else
sym->def[S_DEF_USER].tri = yes;
break;
default:
continue;