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> --- Changes from v1: - Unconditionally add "-I $(objtree)/$(obj)" to _tprogc_flags and drop unnecessary part Reference: - v1: https://lore.kernel.org/all/67bec6a9-af59-d6f9-2630-17280479a1f7@xxxxxxxxx/ - v2: https://lore.kernel.org/all/2ba1c076-f5bf-432f-50c1-72c845403167@xxxxxxxxx/ --- samples/bpf/Makefile | 10 +++++----- samples/bpf/Makefile.target | 9 +-------- 2 files changed, 6 insertions(+), 13 deletions(-) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 615f24ebc49c..cfc960b3713a 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$(src)/../../tools/include/uapi \ + -I$(srctree)/tools/include \ + -I$(srctree)/tools/include/uapi \ -I$(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..d2fab959652e 100644 --- a/samples/bpf/Makefile.target +++ b/samples/bpf/Makefile.target @@ -38,14 +38,7 @@ tprog-cobjs := $(addprefix $(obj)/,$(tprog-cobjs)) # Handle options to gcc. Support building with separate output directory _tprogc_flags = $(TPROGS_CFLAGS) \ - $(TPROGCFLAGS_$(basetarget).o) - -# $(objtree)/$(obj) for including generated headers from checkin source files -ifeq ($(KBUILD_EXTMOD),) -ifdef building_out_of_srctree -_tprogc_flags += -I $(objtree)/$(obj) -endif -endif + -I $(objtree)/$(obj) tprogc_flags = -Wp,-MD,$(depfile) $(_tprogc_flags) -- 2.34.1
