> On Jul 7, 2022, at 7:08 AM, Pu Lehui <pulehui@xxxxxxxxxx> wrote: > > Currently, when cross compiling bpf samples, the host side > cannot use arch-specific bpftool to generate vmlinux.h or > skeleton. We need to compile the bpftool with the host > compiler. > > Signed-off-by: Pu Lehui <pulehui@xxxxxxxxxx> > --- > samples/bpf/Makefile | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > index 5002a5b9a7da..fe54a8c8f312 100644 > --- a/samples/bpf/Makefile > +++ b/samples/bpf/Makefile > @@ -1,4 +1,5 @@ > # SPDX-License-Identifier: GPL-2.0 > +-include tools/scripts/Makefile.include Why do we need the -include here? Thanks, Song > > BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src)) > TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools > @@ -283,11 +284,10 @@ $(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OU > BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool > BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool > BPFTOOL := $(BPFTOOL_OUTPUT)/bpftool > -$(BPFTOOL): $(LIBBPF) $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) > +$(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT) > $(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \ > - OUTPUT=$(BPFTOOL_OUTPUT)/ \ > - LIBBPF_OUTPUT=$(LIBBPF_OUTPUT)/ \ > - LIBBPF_DESTDIR=$(LIBBPF_DESTDIR)/ > + ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ > + OUTPUT=$(BPFTOOL_OUTPUT)/ > > $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT): > $(call msg,MKDIR,$@) > -- > 2.25.1 >
