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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | # ========================================================================== |
3 | # Building binaries on the host system | |
4 | # Binaries are used during the compilation of the kernel, for example | |
5 | # to preprocess a data file. | |
6 | # | |
3156fd05 | 7 | # Both C and C++ are supported, but preferred language is C for such utilities. |
1da177e4 | 8 | # |
3156fd05 | 9 | # Sample syntax (see Documentation/kbuild/makefiles.txt for reference) |
1da177e4 LT |
10 | # hostprogs-y := bin2hex |
11 | # Will compile bin2hex.c and create an executable named bin2hex | |
12 | # | |
13 | # hostprogs-y := lxdialog | |
14 | # lxdialog-objs := checklist.o lxdialog.o | |
15 | # Will compile lxdialog.c and checklist.c, and then link the executable | |
16 | # lxdialog, based on checklist.o and lxdialog.o | |
17 | # | |
18 | # hostprogs-y := qconf | |
19 | # qconf-cxxobjs := qconf.o | |
20 | # qconf-objs := menu.o | |
21 | # Will compile qconf as a C++ program, and menu as a C program. | |
22 | # They are linked as C++ code to the executable qconf | |
23 | ||
8f5cbd7e | 24 | __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m)) |
24403874 ER |
25 | host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m)) |
26 | host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m)) | |
1da177e4 | 27 | |
1da177e4 LT |
28 | # C code |
29 | # Executables compiled from a single .c file | |
edb950c1 MY |
30 | host-csingle := $(foreach m,$(__hostprogs), \ |
31 | $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) | |
1da177e4 LT |
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 | |
d8d9efe2 | 41 | # C++ executables compiled from at least one .cc file |
1da177e4 LT |
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 | ||
24403874 ER |
48 | # Object (.o) files used by the shared libaries |
49 | host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs)))) | |
50 | host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs)))) | |
51 | ||
1da177e4 LT |
52 | host-csingle := $(addprefix $(obj)/,$(host-csingle)) |
53 | host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) | |
54 | host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) | |
55 | host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) | |
56 | host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) | |
24403874 ER |
57 | host-cshlib := $(addprefix $(obj)/,$(host-cshlib)) |
58 | host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib)) | |
59 | host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs)) | |
60 | host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs)) | |
1da177e4 LT |
61 | |
62 | ##### | |
63 | # Handle options to gcc. Support building with separate output directory | |
64 | ||
96f14fe7 | 65 | _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ |
5e8d780d | 66 | $(HOSTCFLAGS_$(basetarget).o) |
10844aeb | 67 | _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ |
5e8d780d | 68 | $(HOSTCXXFLAGS_$(basetarget).o) |
1da177e4 | 69 | |
1da177e4 LT |
70 | __hostc_flags = $(_hostc_flags) |
71 | __hostcxx_flags = $(_hostcxx_flags) | |
58156ba4 MY |
72 | |
73 | ifeq ($(KBUILD_EXTMOD),) | |
74 | ifneq ($(KBUILD_SRC),) | |
1da177e4 LT |
75 | __hostc_flags = -I$(obj) $(call flags,_hostc_flags) |
76 | __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags) | |
77 | endif | |
58156ba4 | 78 | endif |
1da177e4 LT |
79 | |
80 | hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags) | |
81 | hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags) | |
82 | ||
83 | ##### | |
84 | # Compile programs on the host | |
85 | ||
86 | # Create executable from a single .c file | |
87 | # host-csingle -> Executable | |
88 | quiet_cmd_host-csingle = HOSTCC $@ | |
b90a3680 | 89 | cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ |
8377bd2b | 90 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) |
767e581d | 91 | $(host-csingle): $(obj)/%: $(src)/%.c FORCE |
1da177e4 LT |
92 | $(call if_changed_dep,host-csingle) |
93 | ||
94 | # Link an executable based on list of .o files, all plain c | |
95 | # host-cmulti -> executable | |
96 | quiet_cmd_host-cmulti = HOSTLD $@ | |
b90a3680 | 97 | cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \ |
1da177e4 | 98 | $(addprefix $(obj)/,$($(@F)-objs)) \ |
8377bd2b | 99 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) |
97e3226e | 100 | $(host-cmulti): FORCE |
1da177e4 | 101 | $(call if_changed,host-cmulti) |
97e3226e | 102 | $(call multi_depend, $(host-cmulti), , -objs) |
1da177e4 LT |
103 | |
104 | # Create .o file from a single .c file | |
105 | # host-cobjs -> .o | |
106 | quiet_cmd_host-cobjs = HOSTCC $@ | |
107 | cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< | |
767e581d | 108 | $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE |
1da177e4 LT |
109 | $(call if_changed_dep,host-cobjs) |
110 | ||
111 | # Link an executable based on list of .o files, a mixture of .c and .cc | |
112 | # host-cxxmulti -> executable | |
113 | quiet_cmd_host-cxxmulti = HOSTLD $@ | |
b90a3680 | 114 | cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \ |
1da177e4 LT |
115 | $(foreach o,objs cxxobjs,\ |
116 | $(addprefix $(obj)/,$($(@F)-$(o)))) \ | |
8377bd2b | 117 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) |
97e3226e | 118 | $(host-cxxmulti): FORCE |
1da177e4 | 119 | $(call if_changed,host-cxxmulti) |
97e3226e | 120 | $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) |
1da177e4 LT |
121 | |
122 | # Create .o file from a single .cc (C++) file | |
123 | quiet_cmd_host-cxxobjs = HOSTCXX $@ | |
124 | cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< | |
767e581d | 125 | $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE |
1da177e4 LT |
126 | $(call if_changed_dep,host-cxxobjs) |
127 | ||
24403874 ER |
128 | # Compile .c file, create position independent .o file |
129 | # host-cshobjs -> .o | |
130 | quiet_cmd_host-cshobjs = HOSTCC -fPIC $@ | |
131 | cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $< | |
132 | $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE | |
133 | $(call if_changed_dep,host-cshobjs) | |
134 | ||
135 | # Compile .c file, create position independent .o file | |
136 | # Note that plugin capable gcc versions can be either C or C++ based | |
137 | # therefore plugin source files have to be compilable in both C and C++ mode. | |
138 | # This is why a C++ compiler is invoked on a .c file. | |
139 | # host-cxxshobjs -> .o | |
140 | quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@ | |
141 | cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $< | |
142 | $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE | |
143 | $(call if_changed_dep,host-cxxshobjs) | |
144 | ||
145 | # Link a shared library, based on position independent .o files | |
146 | # *.o -> .so shared library (host-cshlib) | |
147 | quiet_cmd_host-cshlib = HOSTLLD -shared $@ | |
b90a3680 | 148 | cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ |
24403874 | 149 | $(addprefix $(obj)/,$($(@F:.so=-objs))) \ |
8377bd2b | 150 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) |
24403874 ER |
151 | $(host-cshlib): FORCE |
152 | $(call if_changed,host-cshlib) | |
153 | $(call multi_depend, $(host-cshlib), .so, -objs) | |
154 | ||
155 | # Link a shared library, based on position independent .o files | |
156 | # *.o -> .so shared library (host-cxxshlib) | |
157 | quiet_cmd_host-cxxshlib = HOSTLLD -shared $@ | |
b90a3680 | 158 | cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ |
24403874 | 159 | $(addprefix $(obj)/,$($(@F:.so=-objs))) \ |
8377bd2b | 160 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) |
24403874 ER |
161 | $(host-cxxshlib): FORCE |
162 | $(call if_changed,host-cxxshlib) | |
163 | $(call multi_depend, $(host-cxxshlib), .so, -objs) | |
164 | ||
1da177e4 | 165 | targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ |
24403874 | 166 | $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs) |