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https://git.proxmox.com/git/mirror_ubuntu-kernels.git
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b1992c3772
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:
src := $(obj)
When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.
This introduces inconsistency between upstream and downstream Makefiles
because $(src) is used instead of $(srctree)/$(src) for the latter.
To address this inconsistency, this commit changes the semantics of
$(src) so that it always points to the directory in the source tree.
Going forward, the variables used in Makefiles will have the following
meanings:
$(obj) - directory in the object tree
$(src) - directory in the source tree (changed by this commit)
$(objtree) - the top of the kernel object tree
$(srctree) - the top of the kernel source tree
Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
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|---|---|---|
| .. | ||
| __init__.py | ||
| .gitignore | ||
| clk.py | ||
| config.py | ||
| constants.py.in | ||
| cpus.py | ||
| device.py | ||
| dmesg.py | ||
| genpd.py | ||
| interrupts.py | ||
| lists.py | ||
| Makefile | ||
| mm.py | ||
| modules.py | ||
| page_owner.py | ||
| pgtable.py | ||
| proc.py | ||
| radixtree.py | ||
| rbtree.py | ||
| slab.py | ||
| stackdepot.py | ||
| symbols.py | ||
| tasks.py | ||
| timerlist.py | ||
| utils.py | ||
| vfs.py | ||
| vmalloc.py | ||