kconfig: add CONFIG_CC_OPTIMIZE_FOR_SIZE
Copy the Kconfig option from "init/Kconfig" of Linux v3.16 tag
and adjust the help document.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/Kconfig b/Kconfig
index ea2c836..cbb691e 100644
--- a/Kconfig
+++ b/Kconfig
@@ -46,6 +46,16 @@
which is done within the script "scripts/setlocalversion".)
+config CC_OPTIMIZE_FOR_SIZE
+ bool "Optimize for size"
+ depends on !SPL_BUILD
+ default y
+ help
+ Enabling this option will pass "-Os" instead of "-O2" to gcc
+ resulting in a smaller U-Boot image.
+
+ This option is enabled by default for U-Boot.
+
endmenu # General setup
menu "Boot images"