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Revert "perf build: Warn for BPF skeletons if endian mismatches"

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This reverts commit 51924ae69eea5bc90b5da525fbcf4bbd5f8551b3.

We need to better polish building with BPF skels, so revert back to
making it an experimental feature that has to be explicitely enabled
using BUILD_BPF_SKEL=1.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2023-05-06 18:06:43 -03:00
parent 6c73f819b6
commit c3e6df97fa
1 changed files with 7 additions and 10 deletions
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17
tools/perf/Makefile.config
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@ -663,17 +663,14 @@ ifndef NO_BPF_SKEL
$(call feature_check,clang-bpf-co-re)
ifeq ($(feature-clang-bpf-co-re), 0)
dummy := $(error: ERROR: BPF skeletons unsupported. clang too old/not installed or build with NO_BPF_SKEL=1.)
else
ifeq ($(filter -DHAVE_LIBBPF_SUPPORT, $(CFLAGS)),)
dummy := $(error: ERROR: BPF skeletons unsupported. BPF skeleton support requires libbpf or build with NO_BPF_SKEL=1.)
else
$(call detected,CONFIG_PERF_BPF_SKEL)
CFLAGS += -DHAVE_BPF_SKEL
endif
endif
ifeq ($(filter -DHAVE_LIBBPF_SUPPORT, $(CFLAGS)),)
dummy := $(error: ERROR: BPF skeletons unsupported. BPF skeleton support requires libbpf or build with NO_BPF_SKEL=1.)
endif
host_byte_order=$(echo ""|$(HOSTCC) -dM -E -|grep __BYTE_ORDER__)
target_byte_order=$(echo ""|$(CC) -dM -E -|grep __BYTE_ORDER__)
ifneq ($(host_byte_order), $(target_byte_order))
$(warning Possibly mismatched host and target endianness may break BPF skeletons)
endif
$(call detected,CONFIG_PERF_BPF_SKEL)
CFLAGS += -DHAVE_BPF_SKEL
endif
dwarf-post-unwind := 1