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| author | Felix Fietkau <nbd@nbd.name> | 2021-11-09 20:59:15 +0100 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2021-11-09 20:59:51 +0100 |
| commit | 694aed607fbc0a0599f1ff951e5af280500339f9 (patch) | |
| tree | 1e346250c8b372855f5e6f54dbbe4f4a5ed90530 /include/bpf.mk | |
| parent | 8a6b1a8d29cbd62f005ba20998ca9c8048ff49fc (diff) | |
| download | upstream-694aed607fbc0a0599f1ff951e5af280500339f9.tar.gz upstream-694aed607fbc0a0599f1ff951e5af280500339f9.tar.bz2 upstream-694aed607fbc0a0599f1ff951e5af280500339f9.zip | |
include/bpf.mk: check minimum required clang version
Avoid spurious runtime errors caused by loading eBPF modules
built with an old clang version
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'include/bpf.mk')
| -rw-r--r-- | include/bpf.mk | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/bpf.mk b/include/bpf.mk index c68ad74554..967de7a172 100644 --- a/include/bpf.mk +++ b/include/bpf.mk @@ -1,6 +1,8 @@ BPF_DEPENDS := @HAS_BPF_TOOLCHAIN LLVM_VER:= +CLANG_MIN_VER:=12 + ifneq ($(CONFIG_USE_LLVM_HOST),) BPF_TOOLCHAIN_HOST_PATH:=$(call qstrip,$(CONFIG_BPF_TOOLCHAIN_HOST_PATH)) ifneq ($(BPF_TOOLCHAIN_HOST_PATH),) @@ -61,6 +63,14 @@ BPF_CFLAGS := \ -Wno-unused-label \ -O2 -emit-llvm -Xclang -disable-llvm-passes +ifeq ($(DUMP),) + CLANG_VER:=$(shell clang -dM -E - < /dev/null | grep __clang_major__ | cut -d' ' -f3) + CLANG_VER_VALID:=$(shell [ "$(CLANG_VER)" -ge "$(CLANG_MIN_VER)" ] && echo 1 ) + ifeq ($(CLANG_VER_VALID),) + $(error ERROR: LLVM/clang version too old. Minimum required: $(CLANG_MIN_VER), found: $(CLANG_VER)) + endif +endif + define CompileBPF $(CLANG) -g -target $(BPF_ARCH)-linux-gnu $(BPF_CFLAGS) $(2) \ -c $(1) -o $(patsubst %.c,%.bc,$(1)) |