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