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22433fc5 MY |
1 | # ========================================================================== |
2 | # Building binaries on the host system | |
3 | # Binaries are used during the compilation of the kernel, for example | |
4 | # to preprocess a data file. | |
5 | # | |
6 | # Both C and C++ are supported, but preferred language is C for such utilities. | |
7 | # | |
8 | # Sample syntax (see Documentation/kbuild/makefiles.txt for reference) | |
9 | # hostprogs-y := bin2hex | |
10 | # Will compile bin2hex.c and create an executable named bin2hex | |
11 | # | |
12 | # hostprogs-y := lxdialog | |
13 | # lxdialog-objs := checklist.o lxdialog.o | |
14 | # Will compile lxdialog.c and checklist.c, and then link the executable | |
15 | # lxdialog, based on checklist.o and lxdialog.o | |
16 | # | |
17 | # hostprogs-y := qconf | |
18 | # qconf-cxxobjs := qconf.o | |
19 | # qconf-objs := menu.o | |
20 | # Will compile qconf as a C++ program, and menu as a C program. | |
21 | # They are linked as C++ code to the executable qconf | |
f32c8649 TR |
22 | # |
23 | # SPDX-License-Identifier: GPL-2.0 | |
24 | # | |
22433fc5 | 25 | |
22433fc5 MY |
26 | __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m)) |
27 | ||
28 | # C code | |
29 | # Executables compiled from a single .c file | |
87e90729 MY |
30 | host-csingle := $(foreach m,$(__hostprogs), \ |
31 | $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) | |
22433fc5 MY |
32 | |
33 | # C executables linked based on several .o files | |
34 | host-cmulti := $(foreach m,$(__hostprogs),\ | |
35 | $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) | |
36 | ||
37 | # Object (.o) files compiled from .c files | |
38 | host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) | |
39 | ||
40 | # C++ code | |
87e90729 | 41 | # C++ executables compiled from at least one .cc file |
22433fc5 MY |
42 | # and zero or more .c files |
43 | host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) | |
44 | ||
45 | # C++ Object (.o) files compiled from .cc files | |
46 | host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) | |
47 | ||
22433fc5 | 48 | # output directory for programs/.o files |
87e90729 MY |
49 | # hostprogs-y := tools/build may have been specified. |
50 | # Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation | |
51 | host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs)) | |
22433fc5 MY |
52 | |
53 | host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs)))) | |
54 | ||
55 | ||
56 | __hostprogs := $(addprefix $(obj)/,$(__hostprogs)) | |
57 | host-csingle := $(addprefix $(obj)/,$(host-csingle)) | |
58 | host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) | |
59 | host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) | |
60 | host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) | |
61 | host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) | |
22433fc5 MY |
62 | host-objdirs := $(addprefix $(obj)/,$(host-objdirs)) |
63 | ||
64 | obj-dirs += $(host-objdirs) | |
65 | ||
66 | ##### | |
67 | # Handle options to gcc. Support building with separate output directory | |
68 | ||
69 | _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ | |
70 | $(HOSTCFLAGS_$(basetarget).o) | |
71 | _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ | |
72 | $(HOSTCXXFLAGS_$(basetarget).o) | |
73 | ||
74 | ifeq ($(KBUILD_SRC),) | |
75 | __hostc_flags = $(_hostc_flags) | |
76 | __hostcxx_flags = $(_hostcxx_flags) | |
77 | else | |
78 | __hostc_flags = -I$(obj) $(call flags,_hostc_flags) | |
79 | __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags) | |
80 | endif | |
81 | ||
82 | hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags) | |
83 | hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags) | |
84 | ||
85 | ##### | |
86 | # Compile programs on the host | |
87 | ||
88 | # Create executable from a single .c file | |
89 | # host-csingle -> Executable | |
90 | quiet_cmd_host-csingle = HOSTCC $@ | |
91 | cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \ | |
92 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) | |
93 | $(host-csingle): $(obj)/%: $(src)/%.c FORCE | |
94 | $(call if_changed_dep,host-csingle) | |
95 | ||
96 | # Link an executable based on list of .o files, all plain c | |
97 | # host-cmulti -> executable | |
98 | quiet_cmd_host-cmulti = HOSTLD $@ | |
99 | cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \ | |
100 | $(addprefix $(obj)/,$($(@F)-objs)) \ | |
101 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) | |
cb6e7b0d | 102 | $(host-cmulti): FORCE |
22433fc5 | 103 | $(call if_changed,host-cmulti) |
cb6e7b0d | 104 | $(call multi_depend, $(host-cmulti), , -objs) |
22433fc5 MY |
105 | |
106 | # Create .o file from a single .c file | |
107 | # host-cobjs -> .o | |
108 | quiet_cmd_host-cobjs = HOSTCC $@ | |
109 | cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< | |
110 | $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE | |
111 | $(call if_changed_dep,host-cobjs) | |
112 | ||
113 | # Link an executable based on list of .o files, a mixture of .c and .cc | |
114 | # host-cxxmulti -> executable | |
115 | quiet_cmd_host-cxxmulti = HOSTLD $@ | |
116 | cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \ | |
117 | $(foreach o,objs cxxobjs,\ | |
118 | $(addprefix $(obj)/,$($(@F)-$(o)))) \ | |
119 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) | |
cb6e7b0d | 120 | $(host-cxxmulti): FORCE |
22433fc5 | 121 | $(call if_changed,host-cxxmulti) |
cb6e7b0d | 122 | $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) |
22433fc5 MY |
123 | |
124 | # Create .o file from a single .cc (C++) file | |
125 | quiet_cmd_host-cxxobjs = HOSTCXX $@ | |
126 | cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< | |
127 | $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE | |
128 | $(call if_changed_dep,host-cxxobjs) | |
129 | ||
22433fc5 | 130 | targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ |
87e90729 | 131 | $(host-cxxmulti) $(host-cxxobjs) |