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Tom Rini83d290c2018-05-06 17:58:06 -04001# SPDX-License-Identifier: GPL-2.0
Masahiro Yamada22433fc2014-02-04 17:24:27 +09002# ==========================================================================
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
Masahiro Yamada22433fc2014-02-04 17:24:27 +090024__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
25
26# C code
27# Executables compiled from a single .c file
Masahiro Yamada87e90722014-10-30 11:06:09 +090028host-csingle := $(foreach m,$(__hostprogs), \
Simon Glass76bce102016-07-04 11:58:11 -060029 $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-sharedobjs),,$(m)))
Masahiro Yamada22433fc2014-02-04 17:24:27 +090030
31# C executables linked based on several .o files
32host-cmulti := $(foreach m,$(__hostprogs),\
33 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
34
Simon Glass76bce102016-07-04 11:58:11 -060035# Shared object libraries
36host-shared := $(foreach m,$(__hostprogs),\
37 $(if $($(m)-sharedobjs),$(m))))
38
Masahiro Yamada22433fc2014-02-04 17:24:27 +090039# Object (.o) files compiled from .c files
40host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
41
42# C++ code
Masahiro Yamada87e90722014-10-30 11:06:09 +090043# C++ executables compiled from at least one .cc file
Masahiro Yamada22433fc2014-02-04 17:24:27 +090044# and zero or more .c files
45host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
46
47# C++ Object (.o) files compiled from .cc files
48host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
49
Masahiro Yamada22433fc2014-02-04 17:24:27 +090050# output directory for programs/.o files
Masahiro Yamada87e90722014-10-30 11:06:09 +090051# hostprogs-y := tools/build may have been specified.
52# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation
53host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs))
Masahiro Yamada22433fc2014-02-04 17:24:27 +090054
55host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs))))
56
57
58__hostprogs := $(addprefix $(obj)/,$(__hostprogs))
59host-csingle := $(addprefix $(obj)/,$(host-csingle))
60host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
61host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
62host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
63host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
Simon Glass76bce102016-07-04 11:58:11 -060064host-shared := $(addprefix $(obj)/,$(host-shared))
Masahiro Yamada22433fc2014-02-04 17:24:27 +090065host-objdirs := $(addprefix $(obj)/,$(host-objdirs))
66
67obj-dirs += $(host-objdirs)
68
69#####
70# Handle options to gcc. Support building with separate output directory
71
72_hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
73 $(HOSTCFLAGS_$(basetarget).o)
74_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
75 $(HOSTCXXFLAGS_$(basetarget).o)
76
77ifeq ($(KBUILD_SRC),)
78__hostc_flags = $(_hostc_flags)
79__hostcxx_flags = $(_hostcxx_flags)
80else
81__hostc_flags = -I$(obj) $(call flags,_hostc_flags)
82__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags)
83endif
84
85hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags)
86hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags)
87
88#####
89# Compile programs on the host
90
91# Create executable from a single .c file
92# host-csingle -> Executable
93quiet_cmd_host-csingle = HOSTCC $@
94 cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \
95 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
96$(host-csingle): $(obj)/%: $(src)/%.c FORCE
97 $(call if_changed_dep,host-csingle)
98
99# Link an executable based on list of .o files, all plain c
100# host-cmulti -> executable
101quiet_cmd_host-cmulti = HOSTLD $@
102 cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
103 $(addprefix $(obj)/,$($(@F)-objs)) \
104 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900105$(host-cmulti): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900106 $(call if_changed,host-cmulti)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900107$(call multi_depend, $(host-cmulti), , -objs)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900108
109# Create .o file from a single .c file
110# host-cobjs -> .o
111quiet_cmd_host-cobjs = HOSTCC $@
112 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
113$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
114 $(call if_changed_dep,host-cobjs)
115
116# Link an executable based on list of .o files, a mixture of .c and .cc
117# host-cxxmulti -> executable
118quiet_cmd_host-cxxmulti = HOSTLD $@
119 cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
120 $(foreach o,objs cxxobjs,\
121 $(addprefix $(obj)/,$($(@F)-$(o)))) \
122 $(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F))
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900123$(host-cxxmulti): FORCE
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900124 $(call if_changed,host-cxxmulti)
Masahiro Yamadacb6e7b02014-10-30 11:06:10 +0900125$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900126
127# Create .o file from a single .cc (C++) file
128quiet_cmd_host-cxxobjs = HOSTCXX $@
129 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
130$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
131 $(call if_changed_dep,host-cxxobjs)
132
Masahiro Yamada22433fc2014-02-04 17:24:27 +0900133targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\
Simon Glass76bce102016-07-04 11:58:11 -0600134 $(host-cxxmulti) $(host-cxxobjs) $(host-shared)