mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
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 $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de>
28 lines
689 B
Makefile
28 lines
689 B
Makefile
#
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# (C) Copyright 2002-2006
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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obj-$(CONFIG_CMD_BOOTM) += bootm.o
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obj-y += cmd_boot.o
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obj-y += gcc.o
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obj-y += init_helpers.o
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obj-y += interrupts.o
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obj-$(CONFIG_SYS_PCAT_INTERRUPTS) += pcat_interrupts.o
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obj-$(CONFIG_SYS_PCAT_TIMER) += pcat_timer.o
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obj-$(CONFIG_PCI) += pci_type1.o
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obj-y += relocate.o
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obj-y += physmem.o
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obj-y += string.o
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obj-$(CONFIG_SYS_X86_TSC_TIMER) += tsc_timer.o
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obj-$(CONFIG_VIDEO_VGA) += video.o
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obj-$(CONFIG_CMD_ZBOOT) += zimage.o
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LIBGCC := $(notdir $(NORMAL_LIBGCC))
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extra-y := $(LIBGCC)
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$(obj)/$(LIBGCC): $(NORMAL_LIBGCC)
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$(OBJCOPY) $< $@ --prefix-symbols=__normal_
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