u-boot/arch/i386/config.mk

#
# (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 ?= i386-linux-

STANDALONE_LOAD_ADDR = 0x40000

PLATFORM_CPPFLAGS += -fno-strict-aliasing
PLATFORM_CPPFLAGS += -Wstrict-prototypes
PLATFORM_CPPFLAGS += -mregparm=3
PLATFORM_CPPFLAGS += -fomit-frame-pointer
PLATFORM_CPPFLAGS += $(call cc-option, -ffreestanding)
PLATFORM_CPPFLAGS += $(call cc-option, -fno-toplevel-reorder,  $(call cc-option, -fno-unit-at-a-time))
PLATFORM_CPPFLAGS += $(call cc-option, -fno-stack-protector)
PLATFORM_CPPFLAGS += $(call cc-option, -mpreferred-stack-boundary=2)
PLATFORM_CPPFLAGS += -DCONFIG_I386 -D__I386__

LDFLAGS += --cref
LDFLAGS_u-boot += --gc-sections
PLATFORM_RELFLAGS += -ffunction-sections
* Patch by Daniel Engstr�m, 13 Nov 2002: Add support for i386 architecture and AMD SC520 board * Patch by Pierre Aubert, 12 Nov 2002: Add support for DOS filesystem and booting from DOS floppy disk 2002-11-18 00:14:45 +00:00			`#`
			`# (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`
			`#`

push CROSS_COMPILE out to $(ARCH)_config.mk Each arch should handle setting a proper default CROSS_COMPILE value in their own config.mk file rather than having to maintain a large ugly list in the Makefile. By using conditional assignment, we don't have to worry about the variable already being set (env/cmdline/etc...). The common config.mk file takes care of exporting CROSS_COMPILE already, and while a few variables (toolchain ones) utilize CROSS_COMPILE before including the arch config.mk, they do so with deferred assignment. Signed-off-by: Mike Frysinger <vapier@gentoo.org> 2009-06-15 03:33:14 +00:00			`CROSS_COMPILE ?= i386-linux-`

push LOAD_ADDR out to arch mk files Rather than maintain/extend the current ifeq($(ARCH)) mess that exists in the standalone Makefile, push the setting up of LOAD_ADDR out to the arch config.mk (and rename to STANDALONE_LOAD_ADDR in the process). This keeps the common code clean and lets the arch do whatever crazy crap it wants in its own area. Signed-off-by: Mike Frysinger <vapier@gentoo.org> 2009-09-04 03:12:47 +00:00			`STANDALONE_LOAD_ADDR = 0x40000`

x86: Change compiler options Change to: - reparam=3 - no-from-pointer - no-stack-protector - preferred-stack-boundary=2 - no-top-level-reorder These options make the code a little smaller and faster 2010-10-07 09:03:23 +00:00			`PLATFORM_CPPFLAGS += -fno-strict-aliasing`
			`PLATFORM_CPPFLAGS += -Wstrict-prototypes`
			`PLATFORM_CPPFLAGS += -mregparm=3`
			`PLATFORM_CPPFLAGS += -fomit-frame-pointer`
			`PLATFORM_CPPFLAGS += $(call cc-option, -ffreestanding)`
			`PLATFORM_CPPFLAGS += $(call cc-option, -fno-toplevel-reorder, $(call cc-option, -fno-unit-at-a-time))`
			`PLATFORM_CPPFLAGS += $(call cc-option, -fno-stack-protector)`
			`PLATFORM_CPPFLAGS += $(call cc-option, -mpreferred-stack-boundary=2)`
* Patch by Daniel Engstr�m, 13 Nov 2002: Add support for i386 architecture and AMD SC520 board * Patch by Pierre Aubert, 12 Nov 2002: Add support for DOS filesystem and booting from DOS floppy disk 2002-11-18 00:14:45 +00:00			`PLATFORM_CPPFLAGS += -DCONFIG_I386 -D__I386__`
x86: use gc sections to reduce image size Follow the discussion of Charles Manning and Mike Frysinger. Using gc_sections helps reduce image size. 2010-10-07 09:03:20 +00:00
Divides variable of linker flags to LDFLAGS-u-boot and LDFLAGS Linker needs to use the proper endian/bfd flags even when doing partial linking. LDFLAGS_u-boot sets linker option which is called it when U-boot is built (u-boot final). LDFLAGS sets necessary option by partial linking (use in cmd_link_o_target). CC: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> 2011-01-06 01:23:54 +00:00			`LDFLAGS += --cref`
			`LDFLAGS_u-boot += --gc-sections`
x86: use gc sections to reduce image size Follow the discussion of Charles Manning and Mike Frysinger. Using gc_sections helps reduce image size. 2010-10-07 09:03:20 +00:00			`PLATFORM_RELFLAGS += -ffunction-sections`