mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 09:27:35 +00:00
9e4140329e
This commit changes the working directory where the build process occurs. Before this commit, build process occurred under the source tree for both in-tree and out-of-tree build. That's why we needed to add $(obj) prefix to all generated files in makefiles like follows: $(obj)u-boot.bin: $(obj)u-boot Here, $(obj) is empty for in-tree build, whereas it points to the output directory for out-of-tree build. And our old build system changes the current working directory with "make -C <sub-dir>" syntax when descending into the sub-directories. On the other hand, Kbuild uses a different idea to handle out-of-tree build and directory descending. The build process of Kbuild always occurs under the output tree. When "O=dir/to/store/output/files" is given, the build system changes the current working directory to that directory and restarts the make. Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>" syntax for descending into sub-directories. (We can write it like "make $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>
66 lines
1.8 KiB
Makefile
66 lines
1.8 KiB
Makefile
#
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# (C) Copyright 2000-2002
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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CROSS_COMPILE ?= bfin-uclinux-
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CONFIG_STANDALONE_LOAD_ADDR ?= 0x1000 -m elf32bfin
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ifeq ($(CONFIG_BFIN_CPU),)
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CONFIG_BFIN_CPU := \
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$(shell awk '$$2 == "CONFIG_BFIN_CPU" { print $$3 }' \
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$(srctree)/include/configs/$(BOARD).h)
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else
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CONFIG_BFIN_CPU := $(strip $(CONFIG_BFIN_CPU:"%"=%))
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endif
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CONFIG_BFIN_BOOT_MODE := $(strip $(CONFIG_BFIN_BOOT_MODE:"%"=%))
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PLATFORM_RELFLAGS += -ffixed-P3 -fomit-frame-pointer -mno-fdpic
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PLATFORM_CPPFLAGS += -DCONFIG_BLACKFIN
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LDFLAGS_FINAL += --gc-sections
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LDFLAGS += -m elf32bfin
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PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections
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PLATFORM_RELFLAGS += -mcpu=$(CONFIG_BFIN_CPU)
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ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_BYPASS)
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ALL-y += u-boot.ldr
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endif
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ifeq ($(CONFIG_ENV_IS_EMBEDDED_IN_LDR),y)
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CREATE_LDR_ENV = tools/envcrc --binary > env-ldr.o
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HOSTCFLAGS_NOPED_ADSP := \
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$(shell $(CPP) -dD - -mcpu=$(CONFIG_BFIN_CPU) </dev/null \
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| awk '$$2 ~ /ADSP/ { print "-D" $$2 }')
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HOSTCFLAGS_NOPED += $(HOSTCFLAGS_NOPED_ADSP)
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else
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CREATE_LDR_ENV =
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endif
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SYM_PREFIX = _
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LDR_FLAGS-y :=
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LDR_FLAGS-$(CONFIG_BFIN_BOOTROM_USES_EVT1) += -J
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LDR_FLAGS += --bmode $(subst BFIN_BOOT_,,$(CONFIG_BFIN_BOOT_MODE))
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LDR_FLAGS += --use-vmas
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LDR_FLAGS += --initcode $(CPUDIR)/initcode.o
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ifneq ($(CONFIG_BFIN_BOOT_MODE),BFIN_BOOT_UART)
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LDR_FLAGS-$(CONFIG_ENV_IS_EMBEDDED_IN_LDR) += \
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--punchit $$(($(CONFIG_ENV_OFFSET))):$$(($(CONFIG_ENV_SIZE))):env-ldr.o
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endif
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ifneq (,$(findstring s,$(MAKEFLAGS)))
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LDR_FLAGS += --quiet
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endif
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LDR_FLAGS += $(LDR_FLAGS-y)
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# Set some default LDR flags based on boot mode.
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LDR_FLAGS += $(LDR_FLAGS-$(CONFIG_BFIN_BOOT_MODE))
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ifneq ($(CONFIG_SYS_TEXT_BASE),)
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$(error do not set CONFIG_SYS_TEXT_BASE for Blackfin boards)
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endif
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