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https://github.com/brain-hackers/u-boot-brain
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![Mike Frysinger](/assets/img/avatar_default.png)
The Linux kernel has some helper rules which allow you to quickly produce some of the intermediary files from C source. Specifically, you can create .i files which is the preprocessed output and you can create .s files which is the assembler output. This is useful when you are trying to track down header/macro expansion errors or inline assembly errors. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
223 lines
6.1 KiB
Makefile
223 lines
6.1 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 $(TOPDIR)/$(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 $(LDSCRIPT) $(PLATFORM_LDFLAGS)
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ifneq ($(TEXT_BASE),)
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LDFLAGS += -Ttext $(TEXT_BASE)
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endif
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# 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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ifeq ($(PCI_CLOCK),PCI_66M)
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CFLAGS := $(CFLAGS) -DPCI_66M
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endif
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#########################################################################
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export HPATH 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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