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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001# SPDX-License-Identifier: GPL-2.0
Masahiro Yamadacf8dfd12019-07-21 01:27:40 +09002
3# LEX
4# ---------------------------------------------------------------------------
5quiet_cmd_flex = LEX $@
6 cmd_flex = $(LEX) -o$@ -L $<
7
8$(obj)/%.lex.c: $(src)/%.l FORCE
9 $(call if_changed,flex)
10
11# YACC
12# ---------------------------------------------------------------------------
13quiet_cmd_bison = YACC $(basename $@).[ch]
14 cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
15
16$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
17 $(call if_changed,bison)
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019# ==========================================================================
20# Building binaries on the host system
21# Binaries are used during the compilation of the kernel, for example
22# to preprocess a data file.
23#
Robert P. J. Day3156fd02008-02-18 04:48:20 -050024# Both C and C++ are supported, but preferred language is C for such utilities.
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020025# Rust is also supported, but it may only be used in scenarios where a Rust
26# toolchain is required to be available (e.g. when `CONFIG_RUST` is enabled).
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#
Mauro Carvalho Chehabcd238ef2019-06-12 14:52:48 -030028# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
Masahiro Yamada5f2fb522020-02-02 01:49:24 +090029# hostprogs := bin2hex
Linus Torvalds1da177e2005-04-16 15:20:36 -070030# Will compile bin2hex.c and create an executable named bin2hex
31#
Masahiro Yamada5f2fb522020-02-02 01:49:24 +090032# hostprogs := lxdialog
Linus Torvalds1da177e2005-04-16 15:20:36 -070033# lxdialog-objs := checklist.o lxdialog.o
34# Will compile lxdialog.c and checklist.c, and then link the executable
35# lxdialog, based on checklist.o and lxdialog.o
36#
Masahiro Yamada5f2fb522020-02-02 01:49:24 +090037# hostprogs := qconf
Linus Torvalds1da177e2005-04-16 15:20:36 -070038# qconf-cxxobjs := qconf.o
39# qconf-objs := menu.o
40# Will compile qconf as a C++ program, and menu as a C program.
41# They are linked as C++ code to the executable qconf
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020042#
43# hostprogs := target
44# target-rust := y
45# Will compile `target` as a Rust program, using `target.rs` as the crate root.
46# The crate may consist of several source files.
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048# C code
49# Executables compiled from a single .c file
Masahiro Yamada85569d12020-07-29 12:15:37 +090050host-csingle := $(foreach m,$(hostprogs), \
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020051 $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53# C executables linked based on several .o files
Masahiro Yamada85569d12020-07-29 12:15:37 +090054host-cmulti := $(foreach m,$(hostprogs),\
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020055 $(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57# Object (.o) files compiled from .c files
Masahiro Yamada85569d12020-07-29 12:15:37 +090058host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
60# C++ code
Masahiro Yamadad8d9efe2014-07-16 16:12:19 +090061# C++ executables compiled from at least one .cc file
Linus Torvalds1da177e2005-04-16 15:20:36 -070062# and zero or more .c files
Masahiro Yamada85569d12020-07-29 12:15:37 +090063host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65# C++ Object (.o) files compiled from .cc files
66host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
67
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020068# Rust code
69# Executables compiled from a single Rust crate (which may consist of
70# one or more .rs files)
71host-rust := $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073host-csingle := $(addprefix $(obj)/,$(host-csingle))
74host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
75host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
76host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
77host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
Miguel Ojeda2f7ab122021-07-03 16:42:57 +020078host-rust := $(addprefix $(obj)/,$(host-rust))
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80#####
81# Handle options to gcc. Support building with separate output directory
82
Masahiro Yamada16169a42023-01-07 18:18:14 +090083hostc_flags = -Wp,-MMD,$(depfile) \
84 $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
Masahiro Yamada54b8ae62019-08-30 13:34:01 +090085 $(HOSTCFLAGS_$(target-stem).o)
Masahiro Yamada16169a42023-01-07 18:18:14 +090086hostcxx_flags = -Wp,-MMD,$(depfile) \
87 $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
Masahiro Yamada54b8ae62019-08-30 13:34:01 +090088 $(HOSTCXXFLAGS_$(target-stem).o)
Miguel Ojedadf01b7c2023-07-23 16:21:28 +020089
90# `--out-dir` is required to avoid temporaries being created by `rustc` in the
91# current working directory, which may be not accessible in the out-of-tree
92# modules case.
93hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
Masahiro Yamada295d8392023-01-07 18:18:15 +090094 $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
Masahiro Yamada16169a42023-01-07 18:18:14 +090095 $(HOSTRUSTFLAGS_$(target-stem))
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Masahiro Yamadacdd750b2019-05-13 15:22:17 +090097# $(objtree)/$(obj) for including generated headers from checkin source files
Masahiro Yamada58156ba2019-01-16 11:56:40 +090098ifeq ($(KBUILD_EXTMOD),)
Masahiro Yamada051f2782019-07-06 12:07:12 +090099ifdef building_out_of_srctree
Masahiro Yamada16169a42023-01-07 18:18:14 +0900100hostc_flags += -I $(objtree)/$(obj)
101hostcxx_flags += -I $(objtree)/$(obj)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102endif
Masahiro Yamada58156ba2019-01-16 11:56:40 +0900103endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105#####
106# Compile programs on the host
107
108# Create executable from a single .c file
109# host-csingle -> Executable
110quiet_cmd_host-csingle = HOSTCC $@
Laura Abbottb90a3682018-07-09 17:46:00 -0700111 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
Masahiro Yamada54b8ae62019-08-30 13:34:01 +0900112 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
Sam Ravnborg767e5812007-05-06 09:23:45 +0200113$(host-csingle): $(obj)/%: $(src)/%.c FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 $(call if_changed_dep,host-csingle)
115
116# Link an executable based on list of .o files, all plain c
117# host-cmulti -> executable
118quiet_cmd_host-cmulti = HOSTLD $@
Laura Abbottb90a3682018-07-09 17:46:00 -0700119 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
Masahiro Yamada54b8ae62019-08-30 13:34:01 +0900120 $(addprefix $(obj)/, $($(target-stem)-objs)) \
121 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
Masahiro Yamada97e32262014-08-19 16:34:21 +0900122$(host-cmulti): FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 $(call if_changed,host-cmulti)
Masahiro Yamada97e32262014-08-19 16:34:21 +0900124$(call multi_depend, $(host-cmulti), , -objs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
126# Create .o file from a single .c file
127# host-cobjs -> .o
128quiet_cmd_host-cobjs = HOSTCC $@
129 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
Sam Ravnborg767e5812007-05-06 09:23:45 +0200130$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 $(call if_changed_dep,host-cobjs)
132
133# Link an executable based on list of .o files, a mixture of .c and .cc
134# host-cxxmulti -> executable
135quiet_cmd_host-cxxmulti = HOSTLD $@
Laura Abbottb90a3682018-07-09 17:46:00 -0700136 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 $(foreach o,objs cxxobjs,\
Masahiro Yamada54b8ae62019-08-30 13:34:01 +0900138 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
139 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
Masahiro Yamada97e32262014-08-19 16:34:21 +0900140$(host-cxxmulti): FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 $(call if_changed,host-cxxmulti)
Masahiro Yamada97e32262014-08-19 16:34:21 +0900142$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144# Create .o file from a single .cc (C++) file
145quiet_cmd_host-cxxobjs = HOSTCXX $@
146 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
Sam Ravnborg767e5812007-05-06 09:23:45 +0200147$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 $(call if_changed_dep,host-cxxobjs)
149
Miguel Ojeda2f7ab122021-07-03 16:42:57 +0200150# Create executable from a single Rust crate (which may consist of
151# one or more `.rs` files)
152# host-rust -> Executable
153quiet_cmd_host-rust = HOSTRUSTC $@
154 cmd_host-rust = \
Masahiro Yamada21852422023-01-07 18:18:17 +0900155 $(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<
Miguel Ojeda2f7ab122021-07-03 16:42:57 +0200156$(host-rust): $(obj)/%: $(src)/%.rs FORCE
157 $(call if_changed_dep,host-rust)
158
Masahiro Yamada42640b132020-07-29 12:15:36 +0900159targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
Miguel Ojeda2f7ab122021-07-03 16:42:57 +0200160 $(host-cxxmulti) $(host-cxxobjs) $(host-rust)