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Date: Wed, 5 Mar 2014 02:36:35 -0500 From: jon@...gle.org To: linux-kernel@...r.kernel.org Cc: Jon Ringle <jringle@...dpoint.com> Subject: [PATCH] Add option to build with -O3 From: Jon Ringle <jringle@...dpoint.com> Signed-off-by: Jon Ringle <jringle@...dpoint.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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