kconfig: environment symbol support
Add the possibility to import a value from the environment into kconfig
via the option syntax. Beside flexibility this has the advantage
providing proper dependencies.
Documented the options syntax.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/kconfig/zconf.gperf b/scripts/kconfig/zconf.gperf
index 93538e5..4051639 100644
--- a/scripts/kconfig/zconf.gperf
+++ b/scripts/kconfig/zconf.gperf
@@ -41,4 +41,5 @@
on, T_ON, TF_PARAM
modules, T_OPT_MODULES, TF_OPTION
defconfig_list, T_OPT_DEFCONFIG_LIST,TF_OPTION
+env, T_OPT_ENV, TF_OPTION
%%