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.
9 # tprogs-y := xsk_example
10 # Will compile xsk_example.c and create an executable named xsk_example
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
17 # Derived from scripts/Makefile.host
19 __tprogs := $(sort $(tprogs-y))
22 # Executables compiled from a single .c file
23 tprog-csingle := $(foreach m,$(__tprogs), \
24 $(if $($(m)-objs),,$(m)))
26 # C executables linked based on several .o files
27 tprog-cmulti := $(foreach m,$(__tprogs),\
28 $(if $($(m)-objs),$(m)))
30 # Object (.o) files compiled from .c files
31 tprog-cobjs := $(sort $(foreach m,$(__tprogs),$($(m)-objs)))
33 tprog-csingle := $(addprefix $(obj)/,$(tprog-csingle))
34 tprog-cmulti := $(addprefix $(obj)/,$(tprog-cmulti))
35 tprog-cobjs := $(addprefix $(obj)/,$(tprog-cobjs))
38 # Handle options to gcc. Support building with separate output directory
40 _tprogc_flags = $(TPROGS_CFLAGS) \
41 $(TPROGCFLAGS_$(basetarget).o)
43 # $(objtree)/$(obj) for including generated headers from checkin source files
44 ifeq ($(KBUILD_EXTMOD),)
45 ifdef building_out_of_srctree
46 _tprogc_flags += -I $(objtree)/$(obj)
50 tprogc_flags = -Wp,-MD,$(depfile) $(_tprogc_flags)
52 # Create executable from a single .c file
53 # tprog-csingle -> Executable
54 quiet_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)
60 # Link an executable based on list of .o files, all plain c
61 # tprog-cmulti -> executable
62 quiet_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)
70 # Create .o file from a single .c file
72 quiet_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)