81cfabcda1
The Makefile in bpf/preload builds a local copy of libbpf, but does not
properly clean up after itself. This can lead to subsequent compilation
failures, since the feature detection cache is kept around which can lead
subsequent detection to fail.
Fix this by properly setting clean-files, and while we're at it, also add a
.gitignore for the directory to ignore the build artifacts.
Fixes: d71fa5c9763c ("bpf: Add kernel module with user mode driver that populates bpffs.")
Change-Id: I7da3cc7799b8ade2b8f9cbfccd50256a3988a2b8
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200927193005.8459-1-toke@redhat.com
26 lines
768 B
Makefile
26 lines
768 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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LIBBPF_SRCS = $(srctree)/tools/lib/bpf/
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LIBBPF_A = $(obj)/libbpf.a
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LIBBPF_OUT = $(abspath $(obj))
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$(LIBBPF_A):
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$(Q)$(MAKE) -C $(LIBBPF_SRCS) OUTPUT=$(LIBBPF_OUT)/ $(LIBBPF_OUT)/libbpf.a
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userccflags += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi \
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-I $(srctree)/tools/lib/ -Wno-unused-result
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userprogs := bpf_preload_umd
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clean-files := $(userprogs) bpf_helper_defs.h FEATURE-DUMP.libbpf staticobjs/ feature/
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bpf_preload_umd-objs := iterators/iterators.o
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bpf_preload_umd-userldlibs := $(LIBBPF_A) -lelf -lz
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$(obj)/bpf_preload_umd: $(LIBBPF_A)
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$(obj)/bpf_preload_umd_blob.o: $(obj)/bpf_preload_umd
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obj-$(CONFIG_BPF_PRELOAD_UMD) += bpf_preload.o
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bpf_preload-objs += bpf_preload_kern.o bpf_preload_umd_blob.o
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