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752677e8 IK |
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 | |
23 | tprog-csingle := $(foreach m,$(__tprogs), \ | |
24 | $(if $($(m)-objs),,$(m))) | |
25 | ||
26 | # C executables linked based on several .o files | |
27 | tprog-cmulti := $(foreach m,$(__tprogs),\ | |
28 | $(if $($(m)-objs),$(m))) | |
29 | ||
30 | # Object (.o) files compiled from .c files | |
31 | tprog-cobjs := $(sort $(foreach m,$(__tprogs),$($(m)-objs))) | |
32 | ||
33 | tprog-csingle := $(addprefix $(obj)/,$(tprog-csingle)) | |
34 | tprog-cmulti := $(addprefix $(obj)/,$(tprog-cmulti)) | |
35 | tprog-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 | |
44 | ifeq ($(KBUILD_EXTMOD),) | |
45 | ifdef building_out_of_srctree | |
46 | _tprogc_flags += -I $(objtree)/$(obj) | |
47 | endif | |
48 | endif | |
49 | ||
50 | tprogc_flags = -Wp,-MD,$(depfile) $(_tprogc_flags) | |
51 | ||
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) | |
59 | ||
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) | |
69 | ||
70 | # Create .o file from a single .c file | |
71 | # tprog-cobjs -> .o | |
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) |