mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-29 08:01:08 +00:00
1aada9cd64
Commit f62fb99941 fixed handling of all rodata sections by using a
wildcard combined with calls to ld's builtin functions SORT_BY_ALIGNMENT()
and SORT_BY_NAME(). Unfortunately these functions were only
introduced with biunutils version 2.16, so the modification broke
building with all tool chains using older binutils.
This patch makes it work again. This is done by omitting the use of
these functions for such old tool chains. This will result in
slightly larger target binaries, as the rodata sections are no longer
in optimal order alignment-wise which reauls in unused gaps, but the
effect was found to be insignificant - especially compared to the fact
that you cannot build U-Boot at all in the current state.
As ld seems to have no support for conditionals we run the linker
script through the C preprocessor which can be easily used to remove
the unwanted function calls.
Note that the C preprocessor must be run with the "-ansi" (or a
"-std=") option to make sure all the system-specific predefined
macros outside the reserved namespace are suppressed. Otherise, cpp
might for example substitute "powerpc" to "1", thus corrupting for
example "OUTPUT_ARCH(powerpc)" etc.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Mike Frysinger <vapier@gentoo.org>
228 lines
6.4 KiB
Makefile
228 lines
6.4 KiB
Makefile
#
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# (C) Copyright 2000-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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#########################################################################
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ifneq ($(OBJTREE),$(SRCTREE))
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ifeq ($(CURDIR),$(SRCTREE))
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dir :=
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else
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dir := $(subst $(SRCTREE)/,,$(CURDIR))
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endif
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obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
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src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
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$(shell mkdir -p $(obj))
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else
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obj :=
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src :=
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endif
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# clean the slate ...
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PLATFORM_RELFLAGS =
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PLATFORM_CPPFLAGS =
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PLATFORM_LDFLAGS =
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#########################################################################
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ifeq ($(HOSTOS),darwin)
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HOSTCC = cc
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else
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HOSTCC = gcc
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endif
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HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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HOSTSTRIP = strip
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#########################################################################
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#
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# Option checker (courtesy linux kernel) to ensure
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# only supported compiler options are used
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#
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cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
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> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
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#
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# Include the make variables (CC, etc...)
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#
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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AR = $(CROSS_COMPILE)ar
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NM = $(CROSS_COMPILE)nm
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LDR = $(CROSS_COMPILE)ldr
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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RANLIB = $(CROSS_COMPILE)RANLIB
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#########################################################################
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# Load generated board configuration
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sinclude $(OBJTREE)/include/autoconf.mk
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ifdef ARCH
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sinclude $(TOPDIR)/lib_$(ARCH)/config.mk # include architecture dependend rules
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endif
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ifdef CPU
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sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules
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endif
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ifdef SOC
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sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules
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endif
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ifdef VENDOR
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BOARDDIR = $(VENDOR)/$(BOARD)
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else
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BOARDDIR = $(BOARD)
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endif
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ifdef BOARD
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sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
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endif
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#########################################################################
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ifneq (,$(findstring s,$(MAKEFLAGS)))
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ARFLAGS = cr
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else
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ARFLAGS = crv
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endif
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RELFLAGS= $(PLATFORM_RELFLAGS)
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DBGFLAGS= -g # -DDEBUG
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OPTFLAGS= -Os #-fomit-frame-pointer
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ifndef LDSCRIPT
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#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
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ifeq ($(CONFIG_NAND_U_BOOT),y)
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LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
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else
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LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
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endif
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endif
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OBJCFLAGS += --gap-fill=0xff
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gccincdir := $(shell $(CC) -print-file-name=include)
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CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
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-D__KERNEL__
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ifneq ($(TEXT_BASE),)
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CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
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endif
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ifneq ($(OBJTREE),$(SRCTREE))
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CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
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endif
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CPPFLAGS += -I$(TOPDIR)/include
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CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
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-isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
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ifdef BUILD_TAG
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CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
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-DBUILD_TAG='"$(BUILD_TAG)"'
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else
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CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
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endif
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CFLAGS += $(call cc-option,-fno-stack-protector)
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# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
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# this option have to be placed behind -Wall -- that's why it is here
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ifeq ($(ARCH),nios)
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ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
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CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
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endif
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endif
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# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
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# option to the assembler.
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AFLAGS_DEBUG :=
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# turn jbsr into jsr for m68k
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ifeq ($(ARCH),m68k)
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ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
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AFLAGS_DEBUG := -Wa,-gstabs,-S
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endif
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endif
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AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
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LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
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ifneq ($(TEXT_BASE),)
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LDFLAGS += -Ttext $(TEXT_BASE)
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endif
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# Special flags for CPP when processing the linker script
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# Linker versions prior to 2.16 don't understand the builting
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# functions SORT_BY_ALIGNMENT() and SORT_BY_NAME(), so disable these
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ifeq ($(shell $(LD) -v | \
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sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\) .*/[ \1 -lt 2 ] || [ \2 -lt 16 ] \&\& echo old_ld/p' | \
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sh),old_ld)
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LDPPFLAGS += -D'SORT_BY_ALIGNMENT(x)=x' -D'SORT_BY_NAME(x)=x'
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endif
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# Location of a usable BFD library, where we define "usable" as
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# "built for ${HOST}, supports ${TARGET}". Sensible values are
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# - When cross-compiling: the root of the cross-environment
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# - Linux/ppc (native): /usr
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# - NetBSD/ppc (native): you lose ... (must extract these from the
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# binutils build directory, plus the native and U-Boot include
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# files don't like each other)
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#
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# So far, this is used only by tools/gdb/Makefile.
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ifeq ($(HOSTOS),darwin)
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BFD_ROOT_DIR = /usr/local/tools
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else
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ifeq ($(HOSTARCH),$(ARCH))
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# native
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BFD_ROOT_DIR = /usr
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else
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#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
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#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
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BFD_ROOT_DIR = /opt/powerpc
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endif
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endif
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#########################################################################
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export HOSTCC HOSTCFLAGS CROSS_COMPILE \
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AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
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export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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#########################################################################
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# Allow boards to use custom optimize flags on a per dir/file basis
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BCURDIR := $(notdir $(CURDIR))
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$(obj)%.s: %.S
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$(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
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$(obj)%.o: %.S
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$(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
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$(obj)%.o: %.c
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$(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
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$(obj)%.i: %.c
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$(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
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$(obj)%.s: %.c
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$(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
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#########################################################################
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