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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166# SPDX-License-Identifier: GPL-2.0
# LEX# ---------------------------------------------------------------------------quiet_cmd_flex = LEX $@ cmd_flex = $(LEX) -o$@ -L $<
$(obj)/%.lex.c: $(src)/%.l FORCE $(call if_changed,flex)
# YACC# ---------------------------------------------------------------------------quiet_cmd_bison = YACC $(basename $@).[ch] cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE $(call if_changed,bison)
# ==========================================================================# Building binaries on the host system# Binaries are used during the compilation of the kernel, for example# to preprocess a data file.## Both C and C++ are supported, but preferred language is C for such utilities.# Rust is also supported, but it may only be used in scenarios where a Rust# toolchain is required to be available (e.g. when `CONFIG_RUST` is enabled).## Sample syntax (see Documentation/kbuild/makefiles.rst for reference)# hostprogs := bin2hex# Will compile bin2hex.c and create an executable named bin2hex## hostprogs := lxdialog# lxdialog-objs := checklist.o lxdialog.o# Will compile lxdialog.c and checklist.c, and then link the executable# lxdialog, based on checklist.o and lxdialog.o## hostprogs := qconf# qconf-cxxobjs := qconf.o# qconf-objs := menu.o# Will compile qconf as a C++ program, and menu as a C program.# They are linked as C++ code to the executable qconf## hostprogs := target# target-rust := y# Will compile `target` as a Rust program, using `target.rs` as the crate root.# The crate may consist of several source files.
# C code# Executables compiled from a single .c filehost-csingle := $(foreach m,$(hostprogs), \ $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))
# C executables linked based on several .o fileshost-cmulti := $(foreach m,$(hostprogs),\ $(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))
# Object (.o) files compiled from .c fileshost-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
# C++ code# C++ executables compiled from at least one .cc file# and zero or more .c fileshost-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
# C++ Object (.o) files compiled from .cc fileshost-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
# Rust code# Executables compiled from a single Rust crate (which may consist of# one or more .rs files)host-rust := $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))
host-csingle := $(addprefix $(obj)/,$(host-csingle))host-cmulti := $(addprefix $(obj)/,$(host-cmulti))host-cobjs := $(addprefix $(obj)/,$(host-cobjs))host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))host-rust := $(addprefix $(obj)/,$(host-rust))
###### Handle options to gcc. Support building with separate output directory
hostc_flags = -Wp,-MMD,$(depfile) \ $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ $(HOSTCFLAGS_$(target-stem).o)hostcxx_flags = -Wp,-MMD,$(depfile) \ $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ $(HOSTCXXFLAGS_$(target-stem).o)
# `--out-dir` is required to avoid temporaries being created by `rustc` in the# current working directory, which may be not accessible in the out-of-tree# modules case.hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \ -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ $(HOSTRUSTFLAGS_$(target-stem))
# $(obj) for including generated headers from checkin source filesifdef building_out_of_srctreehostc_flags += -I $(obj)hostcxx_flags += -I $(obj)endif
###### Compile programs on the host
# Create executable from a single .c file# host-csingle -> Executablequiet_cmd_host-csingle = HOSTCC $@ cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))$(host-csingle): $(obj)/%: $(obj)/%.c FORCE $(call if_changed_dep,host-csingle)
# Link an executable based on list of .o files, all plain c# host-cmulti -> executablequiet_cmd_host-cmulti = HOSTLD $@ cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \ $(addprefix $(obj)/, $($(target-stem)-objs)) \ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))$(host-cmulti): FORCE $(call if_changed,host-cmulti)$(call multi_depend, $(host-cmulti), , -objs)
# Create .o file from a single .c file# host-cobjs -> .oquiet_cmd_host-cobjs = HOSTCC $@ cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<$(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE $(call if_changed_dep,host-cobjs)
# Link an executable based on list of .o files, a mixture of .c and .cc# host-cxxmulti -> executablequiet_cmd_host-cxxmulti = HOSTLD $@ cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \ $(foreach o,objs cxxobjs,\ $(addprefix $(obj)/, $($(target-stem)-$(o)))) \ $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))$(host-cxxmulti): FORCE $(call if_changed,host-cxxmulti)$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
# Create .o file from a single .cc (C++) filequiet_cmd_host-cxxobjs = HOSTCXX $@ cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<$(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE $(call if_changed_dep,host-cxxobjs)
# Create executable from a single Rust crate (which may consist of# one or more `.rs` files)# host-rust -> Executablequiet_cmd_host-rust = HOSTRUSTC $@ cmd_host-rust = \ $(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<$(host-rust): $(obj)/%: $(src)/%.rs FORCE +$(call if_changed_dep,host-rust)
targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \ $(host-cxxmulti) $(host-cxxobjs) $(host-rust)
# %.lex.o <- %.lex.c <- %.l# %.tab.o <- %.tab.[ch] <- %.ytargets += $(call intermediate_targets, .lex.o, .lex.c) \ $(call intermediate_targets, .tab.o, .tab.c .tab.h)