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6d5e7e8bea
In some build configurations the `libfdt.mk` file is included multiple
times. Due to the fact that rules cannot (or rather, should not) be
defined multiple times, the `MAKE_LIB` function (which this makefile
calls) cannot be called twice with the same inputs. Doing so leads to
warnings about overridden rules, e.g.:
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_addresses.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_addresses.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_empty_tree.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_empty_tree.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_ro.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_ro.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_rw.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_rw.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_strerror.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_strerror.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_sw.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_sw.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target libfdt/fdt_wip.o'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target libfdt/fdt_wip.o'
lib/libfdt/libfdt.mk:19: warning: overriding recipe for target lib/libfdt.a'
lib/libfdt/libfdt.mk:19: warning: ignoring old recipe for target lib/libfdt.a'
This change introduces an include guard to the file to prevent it from
executing twice. This avoids redefining the rules defined by `MAKE_LIB`.
Change-Id: I07e0648b07dbd907eaa6dd6fbd0788203b19fddb
Signed-off-by: Chris Kay <chris.kay@arm.com>
23 lines
536 B
Makefile
23 lines
536 B
Makefile
#
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# Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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ifndef libfdt-mk
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libfdt-mk := 1
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LIBFDT_SRCS := $(addprefix lib/libfdt/, \
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fdt.c \
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fdt_addresses.c \
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fdt_empty_tree.c \
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fdt_ro.c \
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fdt_rw.c \
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fdt_strerror.c \
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fdt_sw.c \
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fdt_wip.c)
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INCLUDES += -Iinclude/lib/libfdt
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$(eval $(call MAKE_LIB,fdt))
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endif
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