u-boot/arch/arm/cpu/arm720t/config.mk

#
# (C) Copyright 2002
# Sysgo Real-Time Solutions, GmbH <www.elinos.com>
# Marius Groeger <mgroeger@sysgo.de>
#
# SPDX-License-Identifier:	GPL-2.0+
#

PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi
# =========================================================================
#
# Supply options according to compiler version
#
# =========================================================================
PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\
			$(call cc-option,-malignment-traps,))
PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)
Initial revision 2002-09-05 14:50:51 +00:00			`#`
			`# (C) Copyright 2002`
			`# Sysgo Real-Time Solutions, GmbH <www.elinos.com>`
			`# Marius Groeger <mgroeger@sysgo.de>`
			`#`
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com> 2013-07-08 07:37:19 +00:00			`# SPDX-License-Identifier: GPL-2.0+`
Initial revision 2002-09-05 14:50:51 +00:00			`#`

Make sure only supported compiler options are used Import "cc-option" shell function from kernel and use it to get the correct ARM GCC options for individual CPUs Patch by Peter Pearse, 30 Jun 2005 2005-10-04 20:38:24 +00:00			`PLATFORM_CPPFLAGS += -march=armv4 -mtune=arm7tdmi`
			`# =========================================================================`
			`#`
			`# Supply options according to compiler version`
			`#`
			`# =========================================================================`
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> 2011-11-01 20:54:02 +00:00			`PF_RELFLAGS_SLB_AT := $(call cc-option,-mshort-load-bytes,\`
			`$(call cc-option,-malignment-traps,))`
			`PLATFORM_RELFLAGS += $(PF_RELFLAGS_SLB_AT)`