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