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authorConnor O'Brien2022-01-12 00:25:03 +0000
committerAndrii Nakryiko2022-01-14 16:53:23 -0800
commit0e3a1c902ffb56e9fe4416f0cd382c97b09ecbf6 (patch)
tree5bcfa4b8ba801c404e883cbf71d3b9022ce14e66 /tools/bpf
parent71a3cdf80c0d12aadca6f9b0f5a43883649bdbea (diff)
tools/resolve_btfids: Build with host flags
resolve_btfids is built using $(HOSTCC) and $(HOSTLD) but does not pick up the corresponding flags. As a result, host-specific settings (such as a sysroot specified via HOSTCFLAGS=--sysroot=..., or a linker specified via HOSTLDFLAGS=-fuse-ld=...) will not be respected. Fix this by setting CFLAGS to KBUILD_HOSTCFLAGS and LDFLAGS to KBUILD_HOSTLDFLAGS. Also pass the cflags through to libbpf via EXTRA_CFLAGS to ensure that the host libbpf is built with flags consistent with resolve_btfids. Signed-off-by: Connor O'Brien <connoro@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20220112002503.115968-1-connoro@google.com
Diffstat (limited to 'tools/bpf')
-rw-r--r--tools/bpf/resolve_btfids/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/bpf/resolve_btfids/Makefile b/tools/bpf/resolve_btfids/Makefile
index 9ddeca947635..a7f87cdf11da 100644
--- a/tools/bpf/resolve_btfids/Makefile
+++ b/tools/bpf/resolve_btfids/Makefile
@@ -20,6 +20,8 @@ LD = $(HOSTLD)
ARCH = $(HOSTARCH)
RM ?= rm
CROSS_COMPILE =
+CFLAGS := $(KBUILD_HOSTCFLAGS)
+LDFLAGS := $(KBUILD_HOSTLDFLAGS)
OUTPUT ?= $(srctree)/tools/bpf/resolve_btfids/
@@ -47,10 +49,10 @@ $(SUBCMDOBJ): fixdep FORCE | $(OUTPUT)/libsubcmd
$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUT)
$(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC) OUTPUT=$(LIBBPF_OUT) \
- DESTDIR=$(LIBBPF_DESTDIR) prefix= \
+ DESTDIR=$(LIBBPF_DESTDIR) prefix= EXTRA_CFLAGS="$(CFLAGS)" \
$(abspath $@) install_headers
-CFLAGS := -g \
+CFLAGS += -g \
-I$(srctree)/tools/include \
-I$(srctree)/tools/include/uapi \
-I$(LIBBPF_INCLUDE) \