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Diffstat (limited to 'scripts/Makefile.host')
| -rw-r--r-- | scripts/Makefile.host | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/scripts/Makefile.host b/scripts/Makefile.host new file mode 100644 index 0000000000..8f7f842b54 --- /dev/null +++ b/scripts/Makefile.host @@ -0,0 +1,160 @@ +# 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 file +host-csingle := $(foreach m,$(hostprogs), \ + $(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m))) + +# C executables linked based on several .o files +host-cmulti := $(foreach m,$(hostprogs),\ + $(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m)))) + +# Object (.o) files compiled from .c files +host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs))) + +# C++ code +# C++ executables compiled from at least one .cc file +# and zero or more .c files +host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m))) + +# C++ Object (.o) files compiled from .cc files +host-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) \ + $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ + $(HOSTRUSTFLAGS_$(target-stem)) + +# $(objtree)/$(obj) for including generated headers from checkin source files +ifeq ($(KBUILD_EXTMOD),) +ifdef building_out_of_srctree +hostc_flags += -I $(objtree)/$(obj) +hostcxx_flags += -I $(objtree)/$(obj) +endif +endif + +##### +# Compile programs on the host + +# Create executable from a single .c file +# host-csingle -> Executable +quiet_cmd_host-csingle = HOSTCC $@ + cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ + $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) +$(host-csingle): $(obj)/%: $(src)/%.c FORCE + $(call if_changed_dep,host-csingle) + +# Link an executable based on list of .o files, all plain c +# host-cmulti -> executable +quiet_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 -> .o +quiet_cmd_host-cobjs = HOSTCC $@ + cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< +$(host-cobjs): $(obj)/%.o: $(src)/%.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 -> executable +quiet_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++) file +quiet_cmd_host-cxxobjs = HOSTCXX $@ + cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< +$(host-cxxobjs): $(obj)/%.o: $(src)/%.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 -> Executable +quiet_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) |