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kconfig: use $K64BIT to set 64BIT with all*config targets

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The variable K64BIT can now be used to select the
value of CONFIG_64BIT.

This is for example useful for powerpc to generate
allmodconfig for both bit sizes - like this:
make ARCH=powerpc K64BIT=y
make ARCH=powerpc K64BIT=n

To use this the Kconfig file must use "64BIT" as the
config value to select between 32 and 64 bit.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
This commit is contained in:
Sam Ravnborg 2007-11-10 20:40:05 +01:00
parent 0f855aa64b
commit 2a113281f5
2 changed files with 3 additions and 0 deletions
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2
README
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@ -194,6 +194,8 @@ CONFIGURING the kernel:
"make *config" checks for a file named "all{yes/mod/no/random}.config"
for symbol values that are to be forced. If this file is not found,
it checks for a file named "all.config" to contain forced values.
Finally it checks the environment variable K64BIT and if found, sets
the config symbol "64BIT" to the value of the K64BIT variable.
NOTES on "make config":
- having unnecessary drivers will make the kernel bigger, and can

1
scripts/kconfig/conf.c
View File

@ -591,6 +591,7 @@ int main(int ac, char **av)
conf_read_simple(name, S_DEF_USER);
else if (!stat("all.config", &tmpstat))
conf_read_simple("all.config", S_DEF_USER);
conf_set_env_sym("K64BIT", "64BIT", S_DEF_USER);
break;
default:
break;