From: Masahiro Yamada <yamada.m@jp.panasonic.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 3/3] kconfig: add CONFIG_CC_OPTIMIZE_FOR_SIZE
Date: Fri, 22 Aug 2014 19:42:29 +0900 [thread overview]
Message-ID: <1408704149-14704-4-git-send-email-yamada.m@jp.panasonic.com> (raw)
In-Reply-To: <1408704149-14704-1-git-send-email-yamada.m@jp.panasonic.com>
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>
---
Kconfig | 10 ++++++++++
Makefile | 6 +++++-
2 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/Kconfig b/Kconfig
index ea2c836..cbb691e 100644
--- a/Kconfig
+++ b/Kconfig
@@ -46,6 +46,16 @@ config LOCALVERSION_AUTO
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"
diff --git a/Makefile b/Makefile
index 2938dec..95e298b 100644
--- a/Makefile
+++ b/Makefile
@@ -533,7 +533,11 @@ else
include/config/auto.conf: ;
endif # $(dot-config)
-KBUILD_CFLAGS += -Os #-fomit-frame-pointer
+ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+KBUILD_CFLAGS += -Os
+else
+KBUILD_CFLAGS += -O2
+endif
ifdef BUILD_TAG
KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
--
1.9.1
next prev parent reply other threads:[~2014-08-22 10:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-22 10:42 [U-Boot] [PATCH 0/3] Kconfig: import some options related to general setup Masahiro Yamada
2014-08-22 10:42 ` [U-Boot] [PATCH 1/3] kconfig: add CONFIG_LOCALVERSION and CONFIG_LOCALVERSION_AUTO Masahiro Yamada
2014-08-29 14:41 ` [U-Boot] [U-Boot, " Tom Rini
2014-08-22 10:42 ` [U-Boot] [PATCH 2/3] scripts: refetch scripts/setlocalversion from Linux 3.16 Masahiro Yamada
2014-08-29 14:41 ` [U-Boot] [U-Boot, " Tom Rini
2014-08-22 10:42 ` Masahiro Yamada [this message]
2014-08-29 14:41 ` [U-Boot] [U-Boot,3/3] kconfig: add CONFIG_CC_OPTIMIZE_FOR_SIZE Tom Rini
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