On 07/06, Anh Tuan Phan wrote: > This commit fixes a few compilation issues when building out of source > tree. The command that I used to build samples/bpf: > > export KBUILD_OUTPUT=/tmp > make V=1 M=samples/bpf > > The compilation failed since it tried to find the header files in the > wrong places between output directory and source tree directory > > Signed-off-by: Anh Tuan Phan <tuananhlfc@xxxxxxxxx> > --- > samples/bpf/Makefile | 8 ++++---- > samples/bpf/Makefile.target | 2 +- > 2 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile > index 615f24ebc49c..32469aaa82d5 100644 > --- a/samples/bpf/Makefile > +++ b/samples/bpf/Makefile > @@ -341,10 +341,10 @@ $(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h > # Override includes for xdp_sample_user.o because $(srctree)/usr/include in > # TPROGS_CFLAGS causes conflicts > XDP_SAMPLE_CFLAGS += -Wall -O2 \ > - -I$(src)/../../tools/include \ > + -I$(srctree)/tools/include \ [..] > -I$(src)/../../tools/include/uapi \ Does this $(src) need to be changed as well? > -I$(LIBBPF_INCLUDE) \ > - -I$(src)/../../tools/testing/selftests/bpf > + -I$(srctree)/tools/testing/selftests/bpf > > $(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS) > $(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h > @@ -393,7 +393,7 @@ $(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o > $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h > $(src)/xdp_sample_shared.h > @echo " CLANG-BPF " $@ > $(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \ > - -Wno-compare-distinct-pointer-types -I$(srctree)/include \ > + -Wno-compare-distinct-pointer-types -I$(obj) -I$(srctree)/include \ > -I$(srctree)/samples/bpf -I$(srctree)/tools/include \ > -I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \ > -c $(filter %.bpf.c,$^) -o $@ > @@ -412,7 +412,7 @@ xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o > xdp_sample.bpf.o > > LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach > skel,$(LINKED_SKELS),$($(skel)-deps))) > > -BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c)) > +BPF_SRCS_LINKED := $(notdir $(wildcard $(srctree)/$(src)/*.bpf.c)) > BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED)) > BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS)) > > diff --git a/samples/bpf/Makefile.target b/samples/bpf/Makefile.target > index 7621f55e2947..86a454cfb080 100644 > --- a/samples/bpf/Makefile.target > +++ b/samples/bpf/Makefile.target > @@ -41,7 +41,7 @@ _tprogc_flags = $(TPROGS_CFLAGS) \ > $(TPROGCFLAGS_$(basetarget).o) > > # $(objtree)/$(obj) for including generated headers from checkin source > files [..] > -ifeq ($(KBUILD_EXTMOD),) > +ifneq ($(KBUILD_EXTMOD),) This parts seems to be copy-pasted all over the place in its 'ifeq' form. What is it doing and why is it needed? > ifdef building_out_of_srctree > _tprogc_flags += -I $(objtree)/$(obj) > endif > -- > 2.34.1
