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| author | Wolfgang Denk <wd@denx.de> | 2011-11-01 20:54:02 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-11-03 20:44:58 +0100 |
| commit | cca4e4aec1fe52e5ecd15e3cebdbb36e2f254220 (patch) | |
| tree | 58737a4eeeedb099b8a71f8dfacb11a810e1d4fb /arch/arm/config.mk | |
| parent | 4d6402b012b074f4658785773c97745963c52dc5 (diff) | |
| download | u-boot-imx-cca4e4aec1fe52e5ecd15e3cebdbb36e2f254220.zip u-boot-imx-cca4e4aec1fe52e5ecd15e3cebdbb36e2f254220.tar.gz u-boot-imx-cca4e4aec1fe52e5ecd15e3cebdbb36e2f254220.tar.bz2 | |
Reduce build times
U-Boot Makefiles contain a number of tests for compiler features etc.
which so far are executed again and again. On some architectures
(especially ARM) this results in a large number of calls to gcc.
This patch makes sure to run such tests only once, thus largely
reducing the number of "execve" system calls.
Example: number of "execve" system calls for building the "P2020DS"
(Power Architecture) and "qong" (ARM) boards, measured as:
-> strace -f -e trace=execve -o /tmp/foo ./MAKEALL <board>
-> grep execve /tmp/foo | wc -l
Before: After: Reduction:
==================================
P2020DS 20555 15205 -26%
qong 31692 14490 -54%
As a result, built times are significantly reduced, typically by
30...50%.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Albert Aribaud <albert.aribaud@free.fr>
cc: Graeme Russ <graeme.russ@gmail.com>
cc: Mike Frysinger <vapier@gentoo.org>
Tested-by: Graeme Russ <graeme.russ@gmail.com>
Tested-by: Matthias Weisser <weisserm@arcor.de>
Tested-by: Sanjeev Premi <premi@ti.com>
Tested-by: Simon Glass <sjg@chromium.org>
Tested-by: Macpaul Lin <macpaul@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/arm/config.mk')
| -rw-r--r-- | arch/arm/config.mk | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/arch/arm/config.mk b/arch/arm/config.mk index 9b4e581..45f9dca 100644 --- a/arch/arm/config.mk +++ b/arch/arm/config.mk @@ -34,7 +34,7 @@ endif PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ # Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb: -PLATFORM_CPPFLAGS += $(call cc-option,-marm,) +PF_CPPFLAGS_ARM := $(call cc-option,-marm,) # Try if EABI is supported, else fall back to old API, # i. e. for example: @@ -44,15 +44,16 @@ PLATFORM_CPPFLAGS += $(call cc-option,-marm,) # -mabi=apcs-gnu -mno-thumb-interwork # - with ELDK 3.1 (gcc 3.x), use: # -mapcs-32 -mno-thumb-interwork -PLATFORM_CPPFLAGS += $(call cc-option,\ - -mabi=aapcs-linux -mno-thumb-interwork,\ +PF_CPPFLAGS_ABI := $(call cc-option,\ + -mabi=aapcs-linux -mno-thumb-interwork,\ + $(call cc-option,\ + -mapcs-32,\ $(call cc-option,\ - -mapcs-32,\ - $(call cc-option,\ - -mabi=apcs-gnu,\ - )\ - ) $(call cc-option,-mno-thumb-interwork,)\ - ) + -mabi=apcs-gnu,\ + )\ + ) $(call cc-option,-mno-thumb-interwork,)\ + ) +PLATFORM_CPPFLAGS += $(PF_CPPFLAGS_ARM) $(PF_CPPFLAGS_ABI) # For EABI, make sure to provide raise() ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS))) |