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linux/scripts/kconfig/confdata.c
Sam Ravnborg 6840999b19 x86: simplify "make ARCH=x86" and fix kconfig all.config 
Simplify "make ARCH=x86" and fix kconfig so we again can set 64BIT in
all.config.

For a fix the diffstat is nice:
 6 files changed, 3 insertions(+), 36 deletions(-)

The patch reverts these commits:
 - 0f855aa64b ("kconfig: add helper to set
   config symbol from environment variable")
 - 2a113281f5 ("kconfig: use $K64BIT to
   set 64BIT with all*config targets")

Roman Zippel pointed out that kconfig supported string compares so
the additional complexity introduced by the above two patches were
not needed.

With this patch we have following behaviour:

  # make {allno,allyes,allmod,rand}config [ARCH=...]
  option \ host arch      | 32bit         | 64bit
  =====================================================
  ./.                     | 32bit         | 64bit
  ARCH=x86                | 32bit         | 32bit
  ARCH=i386               | 32bit         | 32bit
  ARCH=x86_64             | 64bit         | 64bit

The general rule are that ARCH= and native architecture takes
precedence over the configuration.

So make ARCH=i386 [whatever] will always build a 32-bit kernel
no matter what the configuration says.  The configuration will
be updated to 32-bit if it was configured to 64-bit and the
other way around.

This behaviour is consistent with previous behaviour so no
suprises here.

make ARCH=x86 will per default result in a 32-bit kernel but as
the only ARCH= value x86 allow the user to select between 32-bit
and 64-bit using menuconfig.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Andreas Herrmann <aherrman@arcor.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-17 08:35:43 -08:00

819 lines
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/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
* Released under the terms of the GNU GPL v2.0.
*/
#include <sys/stat.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define LKC_DIRECT_LINK
#include "lkc.h"
static void conf_warning(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
static const char *conf_filename;
static int conf_lineno, conf_warnings, conf_unsaved;
const char conf_defname[] = "arch/$ARCH/defconfig";
static void conf_warning(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
vfprintf(stderr, fmt, ap);
fprintf(stderr, "\n");
va_end(ap);
conf_warnings++;
}
const char *conf_get_configname(void)
{
char *name = getenv("KCONFIG_CONFIG");
return name ? name : ".config";
}
static char *conf_expand_value(const char *in)
{
struct symbol *sym;
const char *src;
static char res_value[SYMBOL_MAXLENGTH];
char *dst, name[SYMBOL_MAXLENGTH];
res_value[0] = 0;
dst = name;
while ((src = strchr(in, '$'))) {
strncat(res_value, in, src - in);
src++;
dst = name;
while (isalnum(*src) || *src == '_')
*dst++ = *src++;
*dst = 0;
sym = sym_lookup(name, 0);
sym_calc_value(sym);
strcat(res_value, sym_get_string_value(sym));
in = src;
}
strcat(res_value, in);
return res_value;
}
char *conf_get_default_confname(void)
{
struct stat buf;
static char fullname[PATH_MAX+1];
char *env, *name;
name = conf_expand_value(conf_defname);
env = getenv(SRCTREE);
if (env) {
sprintf(fullname, "%s/%s", env, name);
if (!stat(fullname, &buf))
return fullname;
}
return name;
}
static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
{
char *p2;
switch (sym->type) {
case S_TRISTATE:
if (p[0] == 'm') {
sym->def[def].tri = mod;
sym->flags |= def_flags;
break;
}
case S_BOOLEAN:
if (p[0] == 'y') {
sym->def[def].tri = yes;
sym->flags |= def_flags;
break;
}
if (p[0] == 'n') {
sym->def[def].tri = no;
sym->flags |= def_flags;
break;
}
conf_warning("symbol value '%s' invalid for %s", p, sym->name);
break;
case S_OTHER:
if (*p != '"') {
for (p2 = p; *p2 && !isspace(*p2); p2++)
;
sym->type = S_STRING;
goto done;
}
case S_STRING:
if (*p++ != '"')
break;
for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
if (*p2 == '"') {
*p2 = 0;
break;
}
memmove(p2, p2 + 1, strlen(p2));
}
if (!p2) {
conf_warning("invalid string found");
return 1;
}
case S_INT:
case S_HEX:
done:
if (sym_string_valid(sym, p)) {
sym->def[def].val = strdup(p);
sym->flags |= def_flags;
} else {
conf_warning("symbol value '%s' invalid for %s", p, sym->name);
return 1;
}
break;
default:
;
}
return 0;
}
int conf_read_simple(const char *name, int def)
{
FILE *in = NULL;
char line[1024];
char *p, *p2;
struct symbol *sym;
int i, def_flags;
if (name) {
in = zconf_fopen(name);
} else {
struct property *prop;
name = conf_get_configname();
in = zconf_fopen(name);
if (in)
goto load;
sym_add_change_count(1);
if (!sym_defconfig_list)
return 1;
for_all_defaults(sym_defconfig_list, prop) {
if (expr_calc_value(prop->visible.expr) == no ||
prop->expr->type != E_SYMBOL)
continue;
name = conf_expand_value(prop->expr->left.sym->name);
in = zconf_fopen(name);
if (in) {
printf(_("#\n"
"# using defaults found in %s\n"
"#\n"), name);
goto load;
}
}
}
if (!in)
return 1;
load:
conf_filename = name;
conf_lineno = 0;
conf_warnings = 0;
conf_unsaved = 0;
def_flags = SYMBOL_DEF << def;
for_all_symbols(i, sym) {
sym->flags |= SYMBOL_CHANGED;
sym->flags &= ~(def_flags|SYMBOL_VALID);
if (sym_is_choice(sym))
sym->flags |= def_flags;
switch (sym->type) {
case S_INT:
case S_HEX:
case S_STRING:
if (sym->def[def].val)
free(sym->def[def].val);
default:
sym->def[def].val = NULL;
sym->def[def].tri = no;
}
}
while (fgets(line, sizeof(line), in)) {
conf_lineno++;
sym = NULL;
switch (line[0]) {
case '#':
if (memcmp(line + 2, "CONFIG_", 7))
continue;
p = strchr(line + 9, ' ');
if (!p)
continue;
*p++ = 0;
if (strncmp(p, "is not set", 10))
continue;
if (def == S_DEF_USER) {
sym = sym_find(line + 9);
if (!sym) {
conf_warning("trying to assign nonexistent symbol %s", line + 9);
break;
}
} else {
sym = sym_lookup(line + 9, 0);
if (sym->type == S_UNKNOWN)
sym->type = S_BOOLEAN;
}
if (sym->flags & def_flags) {
conf_warning("trying to reassign symbol %s", sym->name);
break;
}
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
sym->def[def].tri = no;
sym->flags |= def_flags;
break;
default:
;
}
break;
case 'C':
if (memcmp(line, "CONFIG_", 7)) {
conf_warning("unexpected data");
continue;
}
p = strchr(line + 7, '=');
if (!p)
continue;
*p++ = 0;
p2 = strchr(p, '\n');
if (p2) {
*p2-- = 0;
if (*p2 == '\r')
*p2 = 0;
}
if (def == S_DEF_USER) {
sym = sym_find(line + 7);
if (!sym) {
conf_warning("trying to assign nonexistent symbol %s", line + 7);
break;
}
} else {
sym = sym_lookup(line + 7, 0);
if (sym->type == S_UNKNOWN)
sym->type = S_OTHER;
}
if (sym->flags & def_flags) {
conf_warning("trying to reassign symbol %s", sym->name);
break;
}
if (conf_set_sym_val(sym, def, def_flags, p))
continue;
break;
case '\r':
case '\n':
break;
default:
conf_warning("unexpected data");
continue;
}
if (sym && sym_is_choice_value(sym)) {
struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
switch (sym->def[def].tri) {
case no:
break;
case mod:
if (cs->def[def].tri == yes) {
conf_warning("%s creates inconsistent choice state", sym->name);
cs->flags &= ~def_flags;
}
break;
case yes:
if (cs->def[def].tri != no) {
conf_warning("%s creates inconsistent choice state", sym->name);
cs->flags &= ~def_flags;
} else
cs->def[def].val = sym;
break;
}
cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
}
}
fclose(in);
if (modules_sym)
sym_calc_value(modules_sym);
return 0;
}
int conf_read(const char *name)
{
struct symbol *sym;
struct property *prop;
struct expr *e;
int i, flags;
sym_set_change_count(0);
if (conf_read_simple(name, S_DEF_USER))
return 1;
for_all_symbols(i, sym) {
sym_calc_value(sym);
if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
goto sym_ok;
if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
/* check that calculated value agrees with saved value */
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
break;
if (!sym_is_choice(sym))
goto sym_ok;
default:
if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
goto sym_ok;
break;
}
} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
/* no previous value and not saved */
goto sym_ok;
conf_unsaved++;
/* maybe print value in verbose mode... */
sym_ok:
if (!sym_is_choice(sym))
continue;
/* The choice symbol only has a set value (and thus is not new)
* if all its visible childs have values.
*/
prop = sym_get_choice_prop(sym);
flags = sym->flags;
for (e = prop->expr; e; e = e->left.expr)
if (e->right.sym->visible != no)
flags &= e->right.sym->flags;
sym->flags &= flags | ~SYMBOL_DEF_USER;
}
for_all_symbols(i, sym) {
if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
/* Reset values of generates values, so they'll appear
* as new, if they should become visible, but that
* doesn't quite work if the Kconfig and the saved
* configuration disagree.
*/
if (sym->visible == no && !conf_unsaved)
sym->flags &= ~SYMBOL_DEF_USER;
switch (sym->type) {
case S_STRING:
case S_INT:
case S_HEX:
/* Reset a string value if it's out of range */
if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
break;
sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
conf_unsaved++;
break;
default:
break;
}
}
}
sym_add_change_count(conf_warnings || conf_unsaved);
return 0;
}
int conf_write(const char *name)
{
FILE *out;
struct symbol *sym;
struct menu *menu;
const char *basename;
char dirname[128], tmpname[128], newname[128];
int type, l;
const char *str;
time_t now;
int use_timestamp = 1;
char *env;
dirname[0] = 0;
if (name && name[0]) {
struct stat st;
char *slash;
if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
strcpy(dirname, name);
strcat(dirname, "/");
basename = conf_get_configname();
} else if ((slash = strrchr(name, '/'))) {
int size = slash - name + 1;
memcpy(dirname, name, size);
dirname[size] = 0;
if (slash[1])
basename = slash + 1;
else
basename = conf_get_configname();
} else
basename = name;
} else
basename = conf_get_configname();
sprintf(newname, "%s%s", dirname, basename);
env = getenv("KCONFIG_OVERWRITECONFIG");
if (!env || !*env) {
sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
out = fopen(tmpname, "w");
} else {
*tmpname = 0;
out = fopen(newname, "w");
}
if (!out)
return 1;
sym = sym_lookup("KERNELVERSION", 0);
sym_calc_value(sym);
time(&now);
env = getenv("KCONFIG_NOTIMESTAMP");
if (env && *env)
use_timestamp = 0;
fprintf(out, _("#\n"
"# Automatically generated make config: don't edit\n"
"# Linux kernel version: %s\n"
"%s%s"
"#\n"),
sym_get_string_value(sym),
use_timestamp ? "# " : "",
use_timestamp ? ctime(&now) : "");
if (!conf_get_changed())
sym_clear_all_valid();
menu = rootmenu.list;
while (menu) {
sym = menu->sym;
if (!sym) {
if (!menu_is_visible(menu))
goto next;
str = menu_get_prompt(menu);
fprintf(out, "\n"
"#\n"
"# %s\n"
"#\n", str);
} else if (!(sym->flags & SYMBOL_CHOICE)) {
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE))
goto next;
sym->flags &= ~SYMBOL_WRITE;
type = sym->type;
if (type == S_TRISTATE) {
sym_calc_value(modules_sym);
if (modules_sym->curr.tri == no)
type = S_BOOLEAN;
}
switch (type) {
case S_BOOLEAN:
case S_TRISTATE:
switch (sym_get_tristate_value(sym)) {
case no:
fprintf(out, "# CONFIG_%s is not set\n", sym->name);
break;
case mod:
fprintf(out, "CONFIG_%s=m\n", sym->name);
break;
case yes:
fprintf(out, "CONFIG_%s=y\n", sym->name);
break;
}
break;
case S_STRING:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=\"", sym->name);
while (1) {
l = strcspn(str, "\"\\");
if (l) {
fwrite(str, l, 1, out);
str += l;
}
if (!*str)
break;
fprintf(out, "\\%c", *str++);
}
fputs("\"\n", out);
break;
case S_HEX:
str = sym_get_string_value(sym);
if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
break;
}
case S_INT:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
break;
}
}
next:
if (menu->list) {
menu = menu->list;
continue;
}
if (menu->next)
menu = menu->next;
else while ((menu = menu->parent)) {
if (menu->next) {
menu = menu->next;
break;
}
}
}
fclose(out);
if (*tmpname) {
strcat(dirname, basename);
strcat(dirname, ".old");
rename(newname, dirname);
if (rename(tmpname, newname))
return 1;
}
printf(_("#\n"
"# configuration written to %s\n"
"#\n"), newname);
sym_set_change_count(0);
return 0;
}
int conf_split_config(void)
{
char *name, path[128];
char *s, *d, c;
struct symbol *sym;
struct stat sb;
int res, i, fd;
name = getenv("KCONFIG_AUTOCONFIG");
if (!name)
name = "include/config/auto.conf";
conf_read_simple(name, S_DEF_AUTO);
if (chdir("include/config"))
return 1;
res = 0;
for_all_symbols(i, sym) {
sym_calc_value(sym);
if ((sym->flags & SYMBOL_AUTO) || !sym->name)
continue;
if (sym->flags & SYMBOL_WRITE) {
if (sym->flags & SYMBOL_DEF_AUTO) {
/*
* symbol has old and new value,
* so compare them...
*/
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym_get_tristate_value(sym) ==
sym->def[S_DEF_AUTO].tri)
continue;
break;
case S_STRING:
case S_HEX:
case S_INT:
if (!strcmp(sym_get_string_value(sym),
sym->def[S_DEF_AUTO].val))
continue;
break;
default:
break;
}
} else {
/*
* If there is no old value, only 'no' (unset)
* is allowed as new value.
*/
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym_get_tristate_value(sym) == no)
continue;
break;
default:
break;
}
}
} else if (!(sym->flags & SYMBOL_DEF_AUTO))
/* There is neither an old nor a new value. */
continue;
/* else
* There is an old value, but no new value ('no' (unset)
* isn't saved in auto.conf, so the old value is always
* different from 'no').
*/
/* Replace all '_' and append ".h" */
s = sym->name;
d = path;
while ((c = *s++)) {
c = tolower(c);
*d++ = (c == '_') ? '/' : c;
}
strcpy(d, ".h");
/* Assume directory path already exists. */
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
if (errno != ENOENT) {
res = 1;
break;
}
/*
* Create directory components,
* unless they exist already.
*/
d = path;
while ((d = strchr(d, '/'))) {
*d = 0;
if (stat(path, &sb) && mkdir(path, 0755)) {
res = 1;
goto out;
}
*d++ = '/';
}
/* Try it again. */
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (fd == -1) {
res = 1;
break;
}
}
close(fd);
}
out:
if (chdir("../.."))
return 1;
return res;
}
int conf_write_autoconf(void)
{
struct symbol *sym;
const char *str;
char *name;
FILE *out, *out_h;
time_t now;
int i, l;
sym_clear_all_valid();
file_write_dep("include/config/auto.conf.cmd");
if (conf_split_config())
return 1;
out = fopen(".tmpconfig", "w");
if (!out)
return 1;
out_h = fopen(".tmpconfig.h", "w");
if (!out_h) {
fclose(out);
return 1;
}
sym = sym_lookup("KERNELVERSION", 0);
sym_calc_value(sym);
time(&now);
fprintf(out, "#\n"
"# Automatically generated make config: don't edit\n"
"# Linux kernel version: %s\n"
"# %s"
"#\n",
sym_get_string_value(sym), ctime(&now));
fprintf(out_h, "/*\n"
" * Automatically generated C config: don't edit\n"
" * Linux kernel version: %s\n"
" * %s"
" */\n"
"#define AUTOCONF_INCLUDED\n",
sym_get_string_value(sym), ctime(&now));
for_all_symbols(i, sym) {
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
continue;
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
switch (sym_get_tristate_value(sym)) {
case no:
break;
case mod:
fprintf(out, "CONFIG_%s=m\n", sym->name);
fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
break;
case yes:
fprintf(out, "CONFIG_%s=y\n", sym->name);
fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
break;
}
break;
case S_STRING:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=\"", sym->name);
fprintf(out_h, "#define CONFIG_%s \"", sym->name);
while (1) {
l = strcspn(str, "\"\\");
if (l) {
fwrite(str, l, 1, out);
fwrite(str, l, 1, out_h);
str += l;
}
if (!*str)
break;
fprintf(out, "\\%c", *str);
fprintf(out_h, "\\%c", *str);
str++;
}
fputs("\"\n", out);
fputs("\"\n", out_h);
break;
case S_HEX:
str = sym_get_string_value(sym);
if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
break;
}
case S_INT:
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
break;
default:
break;
}
}
fclose(out);
fclose(out_h);
name = getenv("KCONFIG_AUTOHEADER");
if (!name)
name = "include/linux/autoconf.h";
if (rename(".tmpconfig.h", name))
return 1;
name = getenv("KCONFIG_AUTOCONFIG");
if (!name)
name = "include/config/auto.conf";
/*
* This must be the last step, kbuild has a dependency on auto.conf
* and this marks the successful completion of the previous steps.
*/
if (rename(".tmpconfig", name))
return 1;
return 0;
}
static int sym_change_count;
static void (*conf_changed_callback)(void);
void sym_set_change_count(int count)
{
int _sym_change_count = sym_change_count;
sym_change_count = count;
if (conf_changed_callback &&
(bool)_sym_change_count != (bool)count)
conf_changed_callback();
}
void sym_add_change_count(int count)
{
sym_set_change_count(count + sym_change_count);
}
bool conf_get_changed(void)
{
return sym_change_count;
}
void conf_set_changed_callback(void (*fn)(void))
{
conf_changed_callback = fn;
}
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