kconfig: autogenerated config_is_xxx macro

this will allow to use to use

	if(config_is_xxx())
	if(config_is_xxx_module())

in the code instead of

	#ifdef CONFIG_xxx
	#ifdef CONFIG_xxx_MODULE

and now let the compiler remove the non usefull code and not the
pre-processor

as done in the mach-types for arm as exmaple

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 29 insertions, 0 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 834eecb010ba..db06af0321b3 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -778,6 +778,29 @@ out:
         return res;
 }
 
+static void conf_write_function_autoconf(FILE *out, char* conf, char* name,
+                                         int val)
+{
+        char c;
+        char *tmp, *d;
+
+        d = strdup(conf);
+        tmp = d;
+        while ((c = *conf++))
+                *d++ = tolower(c);
+
+        fprintf(out, "#define %sis_", tmp);
+        free(tmp);
+
+        d = strdup(name);
+        tmp = d;
+        while ((c = *name++))
+                *d++ = tolower(c);
+        fprintf(out, "%s%s() %d\n", tmp, (val > 1) ? "_module" : "",
+                      val ? 1 : 0);
+        free(tmp);
+}
+
 int conf_write_autoconf(void)
 {
         struct symbol *sym;
@@ -785,6 +808,7 @@ int conf_write_autoconf(void)
         const char *name;
         FILE *out, *tristate, *out_h;
         int i;
+        int fct_val;
 
         sym_clear_all_valid();
 
@@ -825,6 +849,7 @@ int conf_write_autoconf(void)
                        rootmenu.prompt->text);
 
         for_all_symbols(i, sym) {
+                fct_val = 1;
                 sym_calc_value(sym);
                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
                         continue;
@@ -838,12 +863,14 @@ int conf_write_autoconf(void)
                 case S_TRISTATE:
                         switch (sym_get_tristate_value(sym)) {
                         case no:
+                                fct_val = 0;
                                 break;
                         case mod:
                                 fprintf(tristate, "%s%s=M\n",
                                     CONFIG_, sym->name);
                                 fprintf(out_h, "#define %s%s_MODULE 1\n",
                                     CONFIG_, sym->name);
+                                fct_val = 2;
                                 break;
                         case yes:
                                 if (sym->type == S_TRISTATE)
@@ -870,8 +897,10 @@ int conf_write_autoconf(void)
                             CONFIG_, sym->name, str);
                         break;
                 default:
+                        fct_val = 0;
                         break;
                 }
+                conf_write_function_autoconf(out_h, CONFIG_, sym->name, fct_val);
         }
         fclose(out);
         fclose(tristate);