mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-02 08:32:55 +00:00
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 $(src).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
37 lines
859 B
Makefile
37 lines
859 B
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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################################################################################
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#
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# aQuantia Ethernet Controller AQtion Linux Driver
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# Copyright(c) 2014-2017 aQuantia Corporation.
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#
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################################################################################
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obj-$(CONFIG_AQTION) += atlantic.o
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ccflags-y += -I$(src)
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atlantic-objs := aq_main.o \
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aq_nic.o \
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aq_pci_func.o \
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aq_vec.o \
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aq_ring.o \
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aq_hw_utils.o \
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aq_ethtool.o \
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aq_drvinfo.o \
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aq_filters.o \
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aq_phy.o \
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hw_atl/hw_atl_a0.o \
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hw_atl/hw_atl_b0.o \
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hw_atl/hw_atl_utils.o \
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hw_atl/hw_atl_utils_fw2x.o \
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hw_atl/hw_atl_llh.o \
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hw_atl2/hw_atl2.o \
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hw_atl2/hw_atl2_utils.o \
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hw_atl2/hw_atl2_utils_fw.o \
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hw_atl2/hw_atl2_llh.o \
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macsec/macsec_api.o
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atlantic-$(CONFIG_MACSEC) += aq_macsec.o
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atlantic-$(CONFIG_PTP_1588_CLOCK) += aq_ptp.o
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