mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 16:39:35 +00:00
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>
49 lines
1.5 KiB
Makefile
49 lines
1.5 KiB
Makefile
#
|
|
# (C) Copyright 2001-2006
|
|
# 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
|
|
#
|
|
|
|
include $(TOPDIR)/config.mk
|
|
|
|
ifneq ($(OBJTREE),$(SRCTREE))
|
|
$(shell mkdir -p $(obj)../common $(obj)../../tqc/tqm8xx)
|
|
endif
|
|
|
|
LIB = $(obj)lib$(BOARD).o
|
|
|
|
COBJS = scm.o flash.o fpga_scm.o ../common/fpga.o \
|
|
../../tqc/tqm8xx/load_sernum_ethaddr.o
|
|
|
|
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
|
|
OBJS := $(addprefix $(obj),$(COBJS))
|
|
SOBJS := $(addprefix $(obj),$(SOBJS))
|
|
|
|
$(LIB): $(OBJS)
|
|
$(call cmd_link_o_target, $(OBJS))
|
|
|
|
#########################################################################
|
|
|
|
# defines $(obj).depend target
|
|
include $(SRCTREE)/rules.mk
|
|
|
|
sinclude $(obj).depend
|
|
|
|
#########################################################################
|