mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-09 12:46:17 +09:00
cca4e4aec1
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>
84 lines
2.6 KiB
Makefile
84 lines
2.6 KiB
Makefile
#
|
|
# (C) Copyright 2000-2002
|
|
# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
#
|
|
# See file CREDITS for list of people who contributed to this
|
|
# project.
|
|
#
|
|
# This program is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU General Public License as
|
|
# published by the Free Software Foundation; either version 2 of
|
|
# the License, or (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
# MA 02111-1307 USA
|
|
#
|
|
|
|
CROSS_COMPILE ?= arm-linux-
|
|
|
|
ifndef CONFIG_STANDALONE_LOAD_ADDR
|
|
ifeq ($(SOC),omap3)
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0x80300000
|
|
else
|
|
CONFIG_STANDALONE_LOAD_ADDR = 0xc100000
|
|
endif
|
|
endif
|
|
|
|
PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
|
|
|
|
# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
|
|
PF_CPPFLAGS_ARM := $(call cc-option,-marm,)
|
|
|
|
# Try if EABI is supported, else fall back to old API,
|
|
# i. e. for example:
|
|
# - with ELDK 4.2 (EABI supported), use:
|
|
# -mabi=aapcs-linux -mno-thumb-interwork
|
|
# - with ELDK 4.1 (gcc 4.x, no EABI), use:
|
|
# -mabi=apcs-gnu -mno-thumb-interwork
|
|
# - with ELDK 3.1 (gcc 3.x), use:
|
|
# -mapcs-32 -mno-thumb-interwork
|
|
PF_CPPFLAGS_ABI := $(call cc-option,\
|
|
-mabi=aapcs-linux -mno-thumb-interwork,\
|
|
$(call cc-option,\
|
|
-mapcs-32,\
|
|
$(call cc-option,\
|
|
-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)))
|
|
# This file is parsed many times, so the string may get added multiple
|
|
# times. Also, the prefix needs to be different based on whether
|
|
# CONFIG_SPL_BUILD is defined or not. 'filter-out' the existing entry
|
|
# before adding the correct one.
|
|
ifdef CONFIG_SPL_BUILD
|
|
PLATFORM_LIBS := $(SPLTREE)/arch/arm/lib/eabi_compat.o \
|
|
$(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
|
|
else
|
|
PLATFORM_LIBS := $(OBJTREE)/arch/arm/lib/eabi_compat.o \
|
|
$(filter-out %/arch/arm/lib/eabi_compat.o, $(PLATFORM_LIBS))
|
|
endif
|
|
endif
|
|
|
|
ifdef CONFIG_SYS_LDSCRIPT
|
|
# need to strip off double quotes
|
|
LDSCRIPT := $(subst ",,$(CONFIG_SYS_LDSCRIPT))
|
|
else
|
|
LDSCRIPT := $(SRCTREE)/$(CPUDIR)/u-boot.lds
|
|
endif
|
|
|
|
# needed for relocation
|
|
ifndef CONFIG_NAND_SPL
|
|
LDFLAGS_u-boot += -pie
|
|
endif
|