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authorRoman Zippel <zippel@linux-m68k.org>2006-06-08 22:12:39 -0700
committerSam Ravnborg <sam@mars.ravnborg.org>2006-06-09 07:31:30 +0200
commitc955ccafc38e77312b4c65e5a70960080fb8a3f2 (patch)
treef630610edef42b8ed60c455cfdb74d897190f1d3 /scripts
parentddc97cacb310ad68483952e67764c4153c138ed2 (diff)
kconfig: fix .config dependencies
This fixes one of the worst kbuild warts left - the broken dependencies used to check and regenerate the .config file. This was done via an indirect dependency and the .config itself had an empty command, which can cause make not to reread the changed .config file. Instead of this we generate now a new file include/config/auto.conf from .config, which is used for kbuild and has the proper dependencies. It's also the main make target now for all files generated during this step (and thus replaces include/linux/autoconf.h). This also means we can now relax the syntax requirements for the .config file and we don't have to rewrite it all the time, i.e. silentoldconfig only writes .config now when it's necessary to keep it in sync with the Kconfig files and even this can be suppressed by setting the environment variable KCONFIG_NOSILENTUPDATE, so the update can (and must) be done manually. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.build2
-rw-r--r--scripts/Makefile.modpost2
-rw-r--r--scripts/kconfig/conf.c16
-rw-r--r--scripts/kconfig/confdata.c177
-rw-r--r--scripts/kconfig/lkc_proto.h1
-rw-r--r--scripts/kconfig/util.c4
6 files changed, 145 insertions, 57 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e48e60da304..53e53a2e80a 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -8,7 +8,7 @@ PHONY := __build
__build:
# Read .config if it exist, otherwise ignore
--include .config
+-include include/config/auto.conf
include scripts/Kbuild.include
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 0e056cffffd..576cce5e387 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -35,7 +35,7 @@
PHONY := _modpost
_modpost: __modpost
-include .config
+include include/config/auto.conf
include scripts/Kbuild.include
include scripts/Makefile.lib
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 8012d107687..9334da65f36 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -599,7 +599,15 @@ int main(int ac, char **av)
input_mode = ask_silent;
valid_stdin = 1;
}
- }
+ } else if (sym_change_count) {
+ name = getenv("KCONFIG_NOSILENTUPDATE");
+ if (name && *name) {
+ fprintf(stderr, _("\n*** Kernel configuration requires explicit update.\n\n"));
+ return 1;
+ }
+ } else
+ goto skip_check;
+
do {
conf_cnt = 0;
check_conf(&rootmenu);
@@ -608,5 +616,11 @@ int main(int ac, char **av)
fprintf(stderr, _("\n*** Error during writing of the kernel configuration.\n\n"));
return 1;
}
+skip_check:
+ if (input_mode == ask_silent && conf_write_autoconf()) {
+ fprintf(stderr, _("\n*** Error during writing of the kernel configuration.\n\n"));
+ return 1;
+ }
+
return 0;
}
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index a9e3b6abf66..2da4a8d775a 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -342,7 +342,7 @@ int conf_read(const char *name)
int conf_write(const char *name)
{
- FILE *out, *out_h;
+ FILE *out;
struct symbol *sym;
struct menu *menu;
const char *basename;
@@ -379,13 +379,6 @@ int conf_write(const char *name)
out = fopen(newname, "w");
if (!out)
return 1;
- out_h = NULL;
- if (!name) {
- out_h = fopen(".tmpconfig.h", "w");
- if (!out_h)
- return 1;
- file_write_dep(NULL);
- }
sym = sym_lookup("KERNELVERSION", 0);
sym_calc_value(sym);
time(&now);
@@ -401,16 +394,6 @@ int conf_write(const char *name)
sym_get_string_value(sym),
use_timestamp ? "# " : "",
use_timestamp ? ctime(&now) : "");
- if (out_h)
- fprintf(out_h, "/*\n"
- " * Automatically generated C config: don't edit\n"
- " * Linux kernel version: %s\n"
- "%s%s"
- " */\n"
- "#define AUTOCONF_INCLUDED\n",
- sym_get_string_value(sym),
- use_timestamp ? " * " : "",
- use_timestamp ? ctime(&now) : "");
if (!sym_change_count)
sym_clear_all_valid();
@@ -426,11 +409,6 @@ int conf_write(const char *name)
"#\n"
"# %s\n"
"#\n", str);
- if (out_h)
- fprintf(out_h, "\n"
- "/*\n"
- " * %s\n"
- " */\n", str);
} else if (!(sym->flags & SYMBOL_CHOICE)) {
sym_calc_value(sym);
if (!(sym->flags & SYMBOL_WRITE))
@@ -448,59 +426,39 @@ int conf_write(const char *name)
switch (sym_get_tristate_value(sym)) {
case no:
fprintf(out, "# CONFIG_%s is not set\n", sym->name);
- if (out_h)
- fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
break;
case mod:
fprintf(out, "CONFIG_%s=m\n", sym->name);
- if (out_h)
- fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
break;
case yes:
fprintf(out, "CONFIG_%s=y\n", sym->name);
- if (out_h)
- fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
break;
}
break;
case S_STRING:
- // fix me
str = sym_get_string_value(sym);
fprintf(out, "CONFIG_%s=\"", sym->name);
- if (out_h)
- fprintf(out_h, "#define CONFIG_%s \"", sym->name);
- do {
+ while (1) {
l = strcspn(str, "\"\\");
if (l) {
fwrite(str, l, 1, out);
- if (out_h)
- fwrite(str, l, 1, out_h);
- }
- str += l;
- while (*str == '\\' || *str == '"') {
- fprintf(out, "\\%c", *str);
- if (out_h)
- fprintf(out_h, "\\%c", *str);
- str++;
+ str += l;
}
- } while (*str);
+ if (!*str)
+ break;
+ fprintf(out, "\\%c", *str++);
+ }
fputs("\"\n", out);
- if (out_h)
- 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);
- if (out_h)
- 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);
- if (out_h)
- fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
break;
}
}
@@ -520,10 +478,6 @@ int conf_write(const char *name)
}
}
fclose(out);
- if (out_h) {
- fclose(out_h);
- rename(".tmpconfig.h", "include/linux/autoconf.h");
- }
if (!name || basename != conf_def_filename) {
if (!name)
name = conf_def_filename;
@@ -542,3 +496,120 @@ int conf_write(const char *name)
return 0;
}
+
+int conf_write_autoconf(void)
+{
+ struct symbol *sym;
+ const char *str;
+ char *name;
+ FILE *out, *out_h;
+ time_t now;
+ int i, l;
+
+ file_write_dep("include/config/auto.conf.cmd");
+
+ 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));
+
+ sym_clear_all_valid();
+
+ 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;
+}
diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h
index b6a389c5fcb..bd0fb1dc132 100644
--- a/scripts/kconfig/lkc_proto.h
+++ b/scripts/kconfig/lkc_proto.h
@@ -4,6 +4,7 @@ P(conf_parse,void,(const char *name));
P(conf_read,int,(const char *name));
P(conf_read_simple,int,(const char *name));
P(conf_write,int,(const char *name));
+P(conf_write_autoconf,int,(void));
/* menu.c */
P(rootmenu,struct menu,);
diff --git a/scripts/kconfig/util.c b/scripts/kconfig/util.c
index 656d2c87d66..e3f28b9d59f 100644
--- a/scripts/kconfig/util.c
+++ b/scripts/kconfig/util.c
@@ -44,7 +44,9 @@ int file_write_dep(const char *name)
else
fprintf(out, "\t%s\n", file->name);
}
- fprintf(out, "\n.config include/linux/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
+ fprintf(out, "\ninclude/config/auto.conf: \\\n"
+ "\t$(deps_config)\n\n"
+ "$(deps_config): ;\n");
fclose(out);
rename("..config.tmp", name);
return 0;