From: Jon Ringle <jrin...@gridpoint.com>
Signed-off-by: Jon Ringle <jrin...@gridpoint.com>
---
Makefile | 2 ++
init/Kconfig | 19 ++++++++++++++++---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/Makefile b/Makefile
index 78209ee..e7f0b3c 100644
--- a/Makefile
+++ b/Makefile
@@ -581,6 +581,8 @@ all: vmlinux
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
+else ifdef CONFIG_CC_OPTIMIZE_FOR_SPEED
+KBUILD_CFLAGS += -O3
else
KBUILD_CFLAGS += -O2
endif
diff --git a/init/Kconfig b/init/Kconfig
index 009a797..17d4c62 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1233,13 +1233,26 @@ source "usr/Kconfig"
endif
+choice
+ prompt "Optimize"
+
+config CC_OPTIMIZE_NORMAL
+ bool "Optimize Normal (-O2)"
+ help
+ Enabling this option will pass "-O2" to gcc
config CC_OPTIMIZE_FOR_SIZE
- bool "Optimize for size"
+ bool "Optimize for size (-Os)"
help
- Enabling this option will pass "-Os" instead of "-O2" to gcc
+ Enabling this option will pass "-Os" to gcc
resulting in a smaller kernel.
- If unsure, say N.
+config CC_OPTIMIZE_FOR_SPEED
+ bool "Optimze for speed (-O3)"
+ help
+ Enabling this option will pass "-O3" to gcc
+ resulting in a larger kernel (but possibly faster)
+
+endchoice
config SYSCTL
bool
--
1.8.5.4
--
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