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| author | Will Deacon <will@kernel.org> | 2019-11-21 13:41:40 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-07-21 11:50:35 +0200 |
| commit | f143c11bb7b924403ea2d5b5c990717772293620 (patch) | |
| tree | e3a0c0327343bbb7123fb09a252ca79ed51b99a7 /tools/bpf/Makefile | |
| parent | Linux 5.8-rc3 (diff) | |
| download | linux-f143c11bb7b924403ea2d5b5c990717772293620.tar.xz linux-f143c11bb7b924403ea2d5b5c990717772293620.zip | |
tools: bpf: Use local copy of headers including uapi/linux/filter.h
Pulling header files directly out of the kernel sources for inclusion in
userspace programs is highly error prone, not least because it bypasses
the kbuild infrastructure entirely and so may end up referencing other
header files that have not been generated.
Subsequent patches will cause compiler.h to pull in the ungenerated
asm/rwonce.h file via filter.h, breaking the build for tools/bpf:
| $ make -C tools/bpf
| make: Entering directory '/linux/tools/bpf'
| CC bpf_jit_disasm.o
| LINK bpf_jit_disasm
| CC bpf_dbg.o
| In file included from /linux/include/uapi/linux/filter.h:9,
| from /linux/tools/bpf/bpf_dbg.c:41:
| /linux/include/linux/compiler.h:247:10: fatal error: asm/rwonce.h: No such file or directory
| #include <asm/rwonce.h>
| ^~~~~~~~~~~~~~
| compilation terminated.
| make: *** [Makefile:61: bpf_dbg.o] Error 1
| make: Leaving directory '/linux/tools/bpf'
Take a copy of the installed version of linux/filter.h (i.e. the one
created by the 'headers_install' target) into tools/include/uapi/linux/
and adjust the BPF tool Makefile to reference the local include
directories instead of those in the main source tree.
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Reported-by: Xiao Yang <ice_yangxiao@163.com>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'tools/bpf/Makefile')
| -rw-r--r-- | tools/bpf/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/bpf/Makefile b/tools/bpf/Makefile index 6df1850f8353..8a69258fd8aa 100644 --- a/tools/bpf/Makefile +++ b/tools/bpf/Makefile @@ -9,7 +9,8 @@ MAKE = make INSTALL ?= install CFLAGS += -Wall -O2 -CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/include/uapi -I$(srctree)/include +CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/tools/include/uapi \ + -I$(srctree)/tools/include # This will work when bpf is built in tools env. where srctree # isn't set and when invoked from selftests build, where srctree |