mirror of
https://github.com/AsahiLinux/u-boot
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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>
24 lines
571 B
Makefile
24 lines
571 B
Makefile
#
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# (C) Copyright 2007
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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-y += 20001122-1.o
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obj-y += 20010114-2.o
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obj-y += 20010226-1.o
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obj-y += 980619-1.o
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obj-y += acc1.o
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obj-y += compare-fp-1.o
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obj-y += fpu.o
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obj-y += mul-subnormal-single-1.o
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obj-y += darwin-ldouble.o
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CFLAGS := $(shell echo $(CFLAGS) | sed s/-msoft-float//)
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CFLAGS += -mhard-float -fkeep-inline-functions
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$(addprefix $(obj)/,$(obj-y)): $(obj)/%.o: $(src)/%.c
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$(CC) $(ALL_CFLAGS) -o $@.fp $< -c
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$(OBJCOPY) -R .gnu.attributes $@.fp $@
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rm -f $@.fp
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