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| author |   Mauricio Vásquez <mauricio@kinvolk.io> | 2022-02-21 07:56:17 -0500 |
|---|---|---|
| committer |   Andrii Nakryiko <andrii@kernel.org> | 2022-02-23 13:55:01 -0800 |
| commit | a19df7139440258e02126f1c795ba64932a8e949 (patch) | |
| tree | b7af62bcc7dad5616be55524e50d9a5a386d0cf5 /tools/bpf/bpftool/Makefile | |
| parent | scripts/pahole-flags.sh: Parse DWARF and generate BTF with multithreading. (diff) | |
| download | linux-dev-a19df7139440258e02126f1c795ba64932a8e949.tar.xz linux-dev-a19df7139440258e02126f1c795ba64932a8e949.zip | |
bpftool: Remove usage of reallocarray()
This commit fixes a compilation error on systems with glibc < 2.26 [0]:
```
In file included from main.h:14:0,
from gen.c:24:
linux/tools/include/tools/libc_compat.h:11:21: error: attempt to use poisoned "reallocarray"
static inline void *reallocarray(void *ptr, size_t nmemb, size_t size)
```
This happens because gen.c pulls <bpf/libbpf_internal.h>, and then
<tools/libc_compat.h> (through main.h). When
COMPAT_NEED_REALLOCARRAY is set, libc_compat.h defines reallocarray()
which libbpf_internal.h poisons with a GCC pragma.
This commit reuses libbpf_reallocarray() implemented in commit
029258d7b228 ("libbpf: Remove any use of reallocarray() in libbpf").
v1 -> v2:
- reuse libbpf_reallocarray() instead of reimplementing it
Fixes: a9caaba399f9 ("bpftool: Implement "gen min_core_btf" logic")
Reported-by: Quentin Monnet <quentin@isovalent.com>
Signed-off-by: Mauricio Vásquez <mauricio@kinvolk.io>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20220221125617.39610-1-mauricio@kinvolk.io
[0]: https://lore.kernel.org/bpf/3bf2bd49-9f2d-a2df-5536-bc0dde70a83b@isovalent.com/
Diffstat (limited to 'tools/bpf/bpftool/Makefile')
| -rw-r--r-- | tools/bpf/bpftool/Makefile | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile index a137db96bd56..ba647aede0d6 100644 --- a/tools/bpf/bpftool/Makefile +++ b/tools/bpf/bpftool/Makefile @@ -93,7 +93,7 @@ INSTALL ?= install RM ?= rm -f FEATURE_USER = .bpftool -FEATURE_TESTS = libbfd disassembler-four-args reallocarray zlib libcap \ +FEATURE_TESTS = libbfd disassembler-four-args zlib libcap \ clang-bpf-co-re FEATURE_DISPLAY = libbfd disassembler-four-args zlib libcap \ clang-bpf-co-re @@ -118,10 +118,6 @@ ifeq ($(feature-disassembler-four-args), 1) CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE endif -ifeq ($(feature-reallocarray), 0) -CFLAGS += -DCOMPAT_NEED_REALLOCARRAY -endif - LIBS = $(LIBBPF) -lelf -lz LIBS_BOOTSTRAP = $(LIBBPF_BOOTSTRAP) -lelf -lz ifeq ($(feature-libcap), 1) |