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134 lines
4.7 KiB
134 lines
4.7 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# ========================================================================== |
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# Building binaries on the host system |
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# Binaries are used during the compilation of the kernel, for example |
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# to preprocess a data file. |
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# |
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# Both C and C++ are supported, but preferred language is C for such utilities. |
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# |
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# Sample syntax (see Documentation/kbuild/makefiles.txt for reference) |
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# hostprogs-y := bin2hex |
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# Will compile bin2hex.c and create an executable named bin2hex |
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# |
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# hostprogs-y := lxdialog |
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# lxdialog-objs := checklist.o lxdialog.o |
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# Will compile lxdialog.c and checklist.c, and then link the executable |
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# lxdialog, based on checklist.o and lxdialog.o |
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# |
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# hostprogs-y := qconf |
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# qconf-cxxobjs := qconf.o |
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# qconf-objs := menu.o |
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# Will compile qconf as a C++ program, and menu as a C program. |
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# They are linked as C++ code to the executable qconf |
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__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m)) |
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# C code |
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# Executables compiled from a single .c file |
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host-csingle := $(foreach m,$(__hostprogs), \ |
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$(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-sharedobjs),,$(m))) |
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# C executables linked based on several .o files |
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host-cmulti := $(foreach m,$(__hostprogs),\ |
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$(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) |
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# Shared object libraries |
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host-shared := $(foreach m,$(__hostprogs),\ |
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$(if $($(m)-sharedobjs),$(m)))) |
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# Object (.o) files compiled from .c files |
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host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) |
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# C++ code |
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# C++ executables compiled from at least one .cc file |
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# and zero or more .c files |
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host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) |
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# C++ Object (.o) files compiled from .cc files |
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host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) |
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# output directory for programs/.o files |
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# hostprogs-y := tools/build may have been specified. |
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# Retrieve also directory of .o files from prog-objs or prog-cxxobjs notation |
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host-objdirs := $(dir $(__hostprogs) $(host-cobjs) $(host-cxxobjs)) |
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host-objdirs := $(strip $(sort $(filter-out ./,$(host-objdirs)))) |
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__hostprogs := $(addprefix $(obj)/,$(__hostprogs)) |
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host-csingle := $(addprefix $(obj)/,$(host-csingle)) |
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host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) |
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host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) |
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host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) |
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host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) |
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host-shared := $(addprefix $(obj)/,$(host-shared)) |
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host-objdirs := $(addprefix $(obj)/,$(host-objdirs)) |
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obj-dirs += $(host-objdirs) |
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##### |
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# Handle options to gcc. Support building with separate output directory |
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_hostc_flags = $(HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ |
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$(HOSTCFLAGS_$(basetarget).o) |
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_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ |
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$(HOSTCXXFLAGS_$(basetarget).o) |
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ifeq ($(KBUILD_SRC),) |
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__hostc_flags = $(_hostc_flags) |
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__hostcxx_flags = $(_hostcxx_flags) |
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else |
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__hostc_flags = -I$(obj) $(call flags,_hostc_flags) |
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__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags) |
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endif |
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hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags) |
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hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags) |
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##### |
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# Compile programs on the host |
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# Create executable from a single .c file |
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# host-csingle -> Executable |
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quiet_cmd_host-csingle = HOSTCC $@ |
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cmd_host-csingle = $(HOSTCC) $(hostc_flags) -o $@ $< \ |
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$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
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$(host-csingle): $(obj)/%: $(src)/%.c FORCE |
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$(call if_changed_dep,host-csingle) |
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# Link an executable based on list of .o files, all plain c |
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# host-cmulti -> executable |
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quiet_cmd_host-cmulti = HOSTLD $@ |
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cmd_host-cmulti = $(HOSTCC) $(HOSTLDFLAGS) -o $@ \ |
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$(addprefix $(obj)/,$($(@F)-objs)) \ |
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$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
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$(host-cmulti): FORCE |
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$(call if_changed,host-cmulti) |
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$(call multi_depend, $(host-cmulti), , -objs) |
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# Create .o file from a single .c file |
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# host-cobjs -> .o |
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quiet_cmd_host-cobjs = HOSTCC $@ |
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cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< |
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$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE |
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$(call if_changed_dep,host-cobjs) |
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# Link an executable based on list of .o files, a mixture of .c and .cc |
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# host-cxxmulti -> executable |
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quiet_cmd_host-cxxmulti = HOSTLD $@ |
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cmd_host-cxxmulti = $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \ |
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$(foreach o,objs cxxobjs,\ |
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$(addprefix $(obj)/,$($(@F)-$(o)))) \ |
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$(HOST_LOADLIBES) $(HOSTLOADLIBES_$(@F)) |
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$(host-cxxmulti): FORCE |
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$(call if_changed,host-cxxmulti) |
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$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) |
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# Create .o file from a single .cc (C++) file |
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quiet_cmd_host-cxxobjs = HOSTCXX $@ |
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cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< |
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$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE |
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$(call if_changed_dep,host-cxxobjs) |
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targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ |
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$(host-cxxmulti) $(host-cxxobjs) $(host-shared)
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