xref: /openbmc/linux/scripts/Makefile.host (revision d3964221) 
1# SPDX-License-Identifier: GPL-2.0
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#
7# Both C and C++ are supported, but preferred language is C for such utilities.
8#
9# Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
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
24__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
25host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
26host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
27
28# C code
29# Executables compiled from a single .c file
30host-csingle	:= $(foreach m,$(__hostprogs), \
31			$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
32
33# C executables linked based on several .o files
34host-cmulti	:= $(foreach m,$(__hostprogs),\
35		   $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
36
37# Object (.o) files compiled from .c files
38host-cobjs	:= $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
39
40# C++ code
41# C++ executables compiled from at least one .cc file
42# and zero or more .c files
43host-cxxmulti	:= $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
44
45# C++ Object (.o) files compiled from .cc files
46host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
47
48# Object (.o) files used by the shared libaries
49host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
50host-cxxshobjs	:= $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
51
52# output directory for programs/.o files
53# hostprogs-y := tools/build may have been specified.
54# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
55host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
56
57host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
58
59
60__hostprogs     := $(addprefix $(obj)/,$(__hostprogs))
61host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
62host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
63host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
64host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
65host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
66host-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
67host-cxxshlib	:= $(addprefix $(obj)/,$(host-cxxshlib))
68host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
69host-cxxshobjs	:= $(addprefix $(obj)/,$(host-cxxshobjs))
70host-objdirs    := $(addprefix $(obj)/,$(host-objdirs))
71
72obj-dirs += $(host-objdirs)
73
74#####
75# Handle options to gcc. Support building with separate output directory
76
77_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
78                 $(HOSTCFLAGS_$(basetarget).o)
79_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
80                 $(HOSTCXXFLAGS_$(basetarget).o)
81
82ifeq ($(KBUILD_SRC),)
83__hostc_flags	= $(_hostc_flags)
84__hostcxx_flags	= $(_hostcxx_flags)
85else
86__hostc_flags	= -I$(obj) $(call flags,_hostc_flags)
87__hostcxx_flags	= -I$(obj) $(call flags,_hostcxx_flags)
88endif
89
90hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
91hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
92
93#####
94# Compile programs on the host
95
96# Create executable from a single .c file
97# host-csingle -> Executable
98quiet_cmd_host-csingle 	= HOSTCC  $@
99      cmd_host-csingle	= $(HOSTCC) $(hostc_flags) -o $@ $< \
100	  	$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
101$(host-csingle): $(obj)/%: $(src)/%.c FORCE
102	$(call if_changed_dep,host-csingle)
103
104# Link an executable based on list of .o files, all plain c
105# host-cmulti -> executable
106quiet_cmd_host-cmulti	= HOSTLD  $@
107      cmd_host-cmulti	= $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
108			  $(addprefix $(obj)/,$($(@F)-objs)) \
109			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
110$(host-cmulti): FORCE
111	$(call if_changed,host-cmulti)
112$(call multi_depend, $(host-cmulti), , -objs)
113
114# Create .o file from a single .c file
115# host-cobjs -> .o
116quiet_cmd_host-cobjs	= HOSTCC  $@
117      cmd_host-cobjs	= $(HOSTCC) $(hostc_flags) -c -o $@ $<
118$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
119	$(call if_changed_dep,host-cobjs)
120
121# Link an executable based on list of .o files, a mixture of .c and .cc
122# host-cxxmulti -> executable
123quiet_cmd_host-cxxmulti	= HOSTLD  $@
124      cmd_host-cxxmulti	= $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
125			  $(foreach o,objs cxxobjs,\
126			  $(addprefix $(obj)/,$($(@F)-$(o)))) \
127			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
128$(host-cxxmulti): FORCE
129	$(call if_changed,host-cxxmulti)
130$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
131
132# Create .o file from a single .cc (C++) file
133quiet_cmd_host-cxxobjs	= HOSTCXX $@
134      cmd_host-cxxobjs	= $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
135$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
136	$(call if_changed_dep,host-cxxobjs)
137
138# Compile .c file, create position independent .o file
139# host-cshobjs -> .o
140quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
141      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
142$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
143	$(call if_changed_dep,host-cshobjs)
144
145# Compile .c file, create position independent .o file
146# Note that plugin capable gcc versions can be either C or C++ based
147# therefore plugin source files have to be compilable in both C and C++ mode.
148# This is why a C++ compiler is invoked on a .c file.
149# host-cxxshobjs -> .o
150quiet_cmd_host-cxxshobjs	= HOSTCXX -fPIC $@
151      cmd_host-cxxshobjs	= $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
152$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
153	$(call if_changed_dep,host-cxxshobjs)
154
155# Link a shared library, based on position independent .o files
156# *.o -> .so shared library (host-cshlib)
157quiet_cmd_host-cshlib	= HOSTLLD -shared $@
158      cmd_host-cshlib	= $(HOSTCC) $(HOSTLDFLAGS) -shared -o $@ \
159			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
160			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
161$(host-cshlib): FORCE
162	$(call if_changed,host-cshlib)
163$(call multi_depend, $(host-cshlib), .so, -objs)
164
165# Link a shared library, based on position independent .o files
166# *.o -> .so shared library (host-cxxshlib)
167quiet_cmd_host-cxxshlib	= HOSTLLD -shared $@
168      cmd_host-cxxshlib	= $(HOSTCXX) $(HOSTLDFLAGS) -shared -o $@ \
169			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
170			  $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
171$(host-cxxshlib): FORCE
172	$(call if_changed,host-cxxshlib)
173$(call multi_depend, $(host-cxxshlib), .so, -objs)
174
175targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
176	   $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)
177