1# SPDX-License-Identifier: GPL-2.0 2# ========================================================================== 3# Building binaries on the host system 4# Binaries are not used during the compilation of the kernel, and intended 5# to be build for target board, target board can be host of course. Added to 6# build binaries to run not on host system. 7# 8# Sample syntax 9# tprogs-y := xsk_example 10# Will compile xsk_example.c and create an executable named xsk_example 11# 12# tprogs-y := xdpsock 13# xdpsock-objs := xdpsock_1.o xdpsock_2.o 14# Will compile xdpsock_1.c and xdpsock_2.c, and then link the executable 15# xdpsock, based on xdpsock_1.o and xdpsock_2.o 16# 17# Derived from scripts/Makefile.host 18# 19__tprogs := $(sort $(tprogs-y)) 20 21# C code 22# Executables compiled from a single .c file 23tprog-csingle := $(foreach m,$(__tprogs), \ 24 $(if $($(m)-objs),,$(m))) 25 26# C executables linked based on several .o files 27tprog-cmulti := $(foreach m,$(__tprogs),\ 28 $(if $($(m)-objs),$(m))) 29 30# Object (.o) files compiled from .c files 31tprog-cobjs := $(sort $(foreach m,$(__tprogs),$($(m)-objs))) 32 33tprog-csingle := $(addprefix $(obj)/,$(tprog-csingle)) 34tprog-cmulti := $(addprefix $(obj)/,$(tprog-cmulti)) 35tprog-cobjs := $(addprefix $(obj)/,$(tprog-cobjs)) 36 37##### 38# Handle options to gcc. Support building with separate output directory 39 40_tprogc_flags = $(TPROGS_CFLAGS) \ 41 $(TPROGCFLAGS_$(basetarget).o) 42 43# $(objtree)/$(obj) for including generated headers from checkin source files 44ifeq ($(KBUILD_EXTMOD),) 45ifdef building_out_of_srctree 46_tprogc_flags += -I $(objtree)/$(obj) 47endif 48endif 49 50tprogc_flags = -Wp,-MD,$(depfile) $(_tprogc_flags) 51 52# Create executable from a single .c file 53# tprog-csingle -> Executable 54quiet_cmd_tprog-csingle = CC $@ 55 cmd_tprog-csingle = $(CC) $(tprogc_flags) $(TPROGS_LDFLAGS) -o $@ $< \ 56 $(TPROGS_LDLIBS) $(TPROGLDLIBS_$(@F)) 57$(tprog-csingle): $(obj)/%: $(src)/%.c FORCE 58 $(call if_changed_dep,tprog-csingle) 59 60# Link an executable based on list of .o files, all plain c 61# tprog-cmulti -> executable 62quiet_cmd_tprog-cmulti = LD $@ 63 cmd_tprog-cmulti = $(CC) $(tprogc_flags) $(TPROGS_LDFLAGS) -o $@ \ 64 $(addprefix $(obj)/,$($(@F)-objs)) \ 65 $(TPROGS_LDLIBS) $(TPROGLDLIBS_$(@F)) 66$(tprog-cmulti): $(tprog-cobjs) FORCE 67 $(call if_changed,tprog-cmulti) 68$(call multi_depend, $(tprog-cmulti), , -objs) 69 70# Create .o file from a single .c file 71# tprog-cobjs -> .o 72quiet_cmd_tprog-cobjs = CC $@ 73 cmd_tprog-cobjs = $(CC) $(tprogc_flags) -c -o $@ $< 74$(tprog-cobjs): $(obj)/%.o: $(src)/%.c FORCE 75 $(call if_changed_dep,tprog-cobjs) 76 77# Override includes for xdp_sample_user.o because $(srctree)/usr/include in 78# TPROGS_CFLAGS causes conflicts 79XDP_SAMPLE_CFLAGS += -Wall -O2 -lm \ 80 -I./tools/include \ 81 -I./tools/include/uapi \ 82 -I./tools/lib \ 83 -I./tools/testing/selftests/bpf 84$(obj)/xdp_sample_user.o: $(src)/xdp_sample_user.c \ 85 $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h 86 $(CC) $(XDP_SAMPLE_CFLAGS) -c -o $@ $< 87