Root/scripts/Makefile.host

Source at commit cdde9cf73945d547acd3e96f9508c79e84ad0bf1 created 9 years 4 months ago.
By Maarten ter Huurne, MMC: JZ4740: Added support for CPU frequency changing
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
37host-csingle := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
38
39# C executables linked based on several .o files
40host-cmulti := $(foreach m,$(__hostprogs),\
41           $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
42
43# Object (.o) files compiled from .c files
44host-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
49host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
50
51# C++ Object (.o) files compiled from .cc files
52host-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"
56host-cshlib := $(sort $(filter %.so, $(host-cobjs)))
57# Remove .so files from "xxx-objs"
58host-cobjs := $(filter-out %.so,$(host-cobjs))
59
60#Object (.o) files used by the shared libaries
61host-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
65host-objdirs := $(foreach f,$(__hostprogs), $(if $(dir $(f)),$(dir $(f))))
66# directory of .o files from prog-objs notation
67host-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
71host-objdirs += $(foreach f,$(host-cxxmulti), \
72                    $(foreach m,$($(f)-cxxobjs), \
73                        $(if $(dir $(m)),$(dir $(m)))))
74
75host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
76
77
78__hostprogs := $(addprefix $(obj)/,$(__hostprogs))
79host-csingle := $(addprefix $(obj)/,$(host-csingle))
80host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
81host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
82host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
83host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
84host-cshlib := $(addprefix $(obj)/,$(host-cshlib))
85host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs))
86host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
87
88obj-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
98ifeq ($(KBUILD_SRC),)
99__hostc_flags = $(_hostc_flags)
100__hostcxx_flags = $(_hostcxx_flags)
101else
102__hostc_flags = -I$(obj) $(call flags,_hostc_flags)
103__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
104endif
105
106hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
107hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
108
109#####
110# Compile programs on the host
111
112# Create executable from a single .c file
113# host-csingle -> Executable
114quiet_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
122quiet_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
131quiet_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
138quiet_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
147quiet_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
154quiet_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)
161quiet_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
168targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
169       $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs)
170
171

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