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Config.in: add -Ofast option

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-Ofast (introduced in GCC 4.6) It combines the existing optimization level -O3
with options that can affect standards compliance but result in better optimized
code. For example, -Ofast enables -ffast-math.

Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Joshua Henderson 2018-03-26 12:34:05 -07:00 committed by Thomas Petazzoni
parent ef3304dabc
commit ed6a7e18af
2 changed files with 14 additions and 0 deletions
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11
Config.in
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@ -527,6 +527,17 @@ config BR2_OPTIMIZE_S
-ftree-vect-loop-version -ftree-vect-loop-version
This is the default. This is the default.
config BR2_OPTIMIZE_FAST
bool "optimize for fast"
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
help
Optimize for fast. Disregard strict standards
compliance. -Ofast enables all -O3 optimizations. It also
enables optimizations that are not valid for all
standard-compliant programs. It turns on -ffast-math and the
Fortran-specific -fstack-arrays, unless -fmax-stack-var-size
is specified, and -fno-protect-parens.
endchoice endchoice
config BR2_GOOGLE_BREAKPAD_ENABLE config BR2_GOOGLE_BREAKPAD_ENABLE

3
package/Makefile.in
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@ -128,6 +128,9 @@ endif
ifeq ($(BR2_OPTIMIZE_S),y) ifeq ($(BR2_OPTIMIZE_S),y)
TARGET_OPTIMIZATION = -Os TARGET_OPTIMIZATION = -Os
endif endif
ifeq ($(BR2_OPTIMIZE_FAST),y)
TARGET_OPTIMIZATION = -Ofast
endif
ifeq ($(BR2_DEBUG_1),y) ifeq ($(BR2_DEBUG_1),y)
TARGET_DEBUGGING = -g1 TARGET_DEBUGGING = -g1
endif endif