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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 |
22 | |
23 | # hostprogs-y := conf |
24 | # conf-objs := conf.o libkconfig.so |
25 | # libkconfig-objs := expr.o type.o |
26 | # Will create a shared library named libkconfig.so that consists of |
27 | # expr.o and type.o (they are both compiled as C code and the object files |
28 | # are made as position independent code). |
29 | # conf.c is compiled as a C program, and conf.o is linked together with |
30 | # libkconfig.so as the executable conf. |
31 | # Note: Shared libraries consisting of C++ files are not supported |
32 | |
33 | __hostprogs := $(sort $(hostprogs-y) $(hostprogs-m)) |
34 | |
35 | # C code |
36 | # Executables compiled from a single .c file |
37 | host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m))) |
38 | |
39 | # C executables linked based on several .o files |
40 | host-cmulti := $(foreach m,$(__hostprogs),\ |
41 | $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) |
42 | |
43 | # Object (.o) files compiled from .c files |
44 | host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) |
45 | |
46 | # C++ code |
47 | # C++ executables compiled from at least on .cc file |
48 | # and zero or more .c files |
49 | host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) |
50 | |
51 | # C++ Object (.o) files compiled from .cc files |
52 | host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) |
53 | |
54 | # Shared libaries (only .c supported) |
55 | # Shared libraries (.so) - all .so files referenced in "xxx-objs" |
56 | host-cshlib := $(sort $(filter %.so, $(host-cobjs))) |
57 | # Remove .so files from "xxx-objs" |
58 | host-cobjs := $(filter-out %.so,$(host-cobjs)) |
59 | |
60 | #Object (.o) files used by the shared libaries |
61 | host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs)))) |
62 | |
63 | # output directory for programs/.o files |
64 | # hostprogs-y := tools/build may have been specified. Retrieve directory |
65 | host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f)))) |
66 | # directory of .o files from prog-objs notation |
67 | host-objdirs += $(foreach f,$(host-cmulti), \ |
68 | $(foreach m,$($(f)-objs), \ |
69 | $(if $(dir $(m)),$(dir $(m))))) |
70 | # directory of .o files from prog-cxxobjs notation |
71 | host-objdirs += $(foreach f,$(host-cxxmulti), \ |
72 | $(foreach m,$($(f)-cxxobjs), \ |
73 | $(if $(dir $(m)),$(dir $(m))))) |
74 | |
75 | host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs)))) |
76 | |
77 | |
78 | __hostprogs := $(addprefix $(obj)/,$(__hostprogs)) |
79 | host-csingle := $(addprefix $(obj)/,$(host-csingle)) |
80 | host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) |
81 | host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) |
82 | host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) |
83 | host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) |
84 | host-cshlib := $(addprefix $(obj)/,$(host-cshlib)) |
85 | host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs)) |
86 | host-objdirs := $(addprefix $(obj)/,$(host-objdirs)) |
87 | |
88 | obj-dirs += $(host-objdirs) |
89 | |
90 | ##### |
91 | # Handle options to gcc. Support building with separate output directory |
92 | |
93 | _hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ |
94 | $(HOSTCFLAGS_$(basetarget).o) |
95 | _hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ |
96 | $(HOSTCXXFLAGS_$(basetarget).o) |
97 | |
98 | ifeq ($(KBUILD_SRC),) |
99 | __hostc_flags = $(_hostc_flags) |
100 | __hostcxx_flags = $(_hostcxx_flags) |
101 | else |
102 | __hostc_flags = -I$(obj) $(call flags,_hostc_flags) |
103 | __hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags) |
104 | endif |
105 | |
106 | hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags) |
107 | hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags) |
108 | |
109 | ##### |
110 | # Compile programs on the host |
111 | |
112 | # Create executable from a single .c file |
113 | # host-csingle -> Executable |
114 | quiet_cmd_host-csingle = HOSTCC $@ |
115 | cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \ |
116 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
117 | $(host-csingle): $(obj)/%: $(src)/%.c FORCE |
118 | $(call if_changed_dep,host-csingle) |
119 | |
120 | # Link an executable based on list of .o files, all plain c |
121 | # host-cmulti -> executable |
122 | quiet_cmd_host-cmulti = HOSTLD $@ |
123 | cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \ |
124 | $(addprefix $(obj)/,$($(@F)-objs)) \ |
125 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
126 | $(host-cmulti): $(obj)/%: $(host-cobjs) $(host-cshlib) FORCE |
127 | $(call if_changed,host-cmulti) |
128 | |
129 | # Create .o file from a single .c file |
130 | # host-cobjs -> .o |
131 | quiet_cmd_host-cobjs = HOSTCC $@ |
132 | cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< |
133 | $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE |
134 | $(call if_changed_dep,host-cobjs) |
135 | |
136 | # Link an executable based on list of .o files, a mixture of .c and .cc |
137 | # host-cxxmulti -> executable |
138 | quiet_cmd_host-cxxmulti = HOSTLD $@ |
139 | cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \ |
140 | $(foreach o,objs cxxobjs,\ |
141 | $(addprefix $(obj)/,$($(@F)-$(o)))) \ |
142 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
143 | $(host-cxxmulti): $(obj)/%: $(host-cobjs) $(host-cxxobjs) $(host-cshlib) FORCE |
144 | $(call if_changed,host-cxxmulti) |
145 | |
146 | # Create .o file from a single .cc (C++) file |
147 | quiet_cmd_host-cxxobjs = HOSTCXX $@ |
148 | cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< |
149 | $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE |
150 | $(call if_changed_dep,host-cxxobjs) |
151 | |
152 | # Compile .c file, create position independent .o file |
153 | # host-cshobjs -> .o |
154 | quiet_cmd_host-cshobjs = HOSTCC -fPIC $@ |
155 | cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $< |
156 | $(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE |
157 | $(call if_changed_dep,host-cshobjs) |
158 | |
159 | # Link a shared library, based on position independent .o files |
160 | # *.o -> .so shared library (host-cshlib) |
161 | quiet_cmd_host-cshlib = HOSTLLD -shared $@ |
162 | cmd_host-cshlib = $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \ |
163 | $(addprefix $(obj)/,$($(@F:.so=-objs))) \ |
164 | $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
165 | $(host-cshlib): $(obj)/%: $(host-cshobjs) FORCE |
166 | $(call if_changed,host-cshlib) |
167 | |
168 | targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ |
169 | $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) |
170 | |
171 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9