1# SPDX-License-Identifier: GPL-2.0 2 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 19# ========================================================================== 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# 24# Both C and C++ are supported, but preferred language is C for such utilities. 25# 26# Sample syntax (see Documentation/kbuild/makefiles.rst for reference) 27# hostprogs-y := bin2hex 28# Will compile bin2hex.c and create an executable named bin2hex 29# 30# hostprogs-y := lxdialog 31# lxdialog-objs := checklist.o lxdialog.o 32# Will compile lxdialog.c and checklist.c, and then link the executable 33# lxdialog, based on checklist.o and lxdialog.o 34# 35# hostprogs-y := qconf 36# qconf-cxxobjs := qconf.o 37# qconf-objs := menu.o 38# Will compile qconf as a C++ program, and menu as a C program. 39# They are linked as C++ code to the executable qconf 40 41__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m)) 42host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m)) 43host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m)) 44 45# C code 46# Executables compiled from a single .c file 47host-csingle := $(foreach m,$(__hostprogs), \ 48 $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) 49 50# C executables linked based on several .o files 51host-cmulti := $(foreach m,$(__hostprogs),\ 52 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) 53 54# Object (.o) files compiled from .c files 55host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) 56 57# C++ code 58# C++ executables compiled from at least one .cc file 59# and zero or more .c files 60host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) 61 62# C++ Object (.o) files compiled from .cc files 63host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) 64 65# Object (.o) files used by the shared libaries 66host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs)))) 67host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs)))) 68 69host-csingle := $(addprefix $(obj)/,$(host-csingle)) 70host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) 71host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) 72host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) 73host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) 74host-cshlib := $(addprefix $(obj)/,$(host-cshlib)) 75host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib)) 76host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs)) 77host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs)) 78 79##### 80# Handle options to gcc. Support building with separate output directory 81 82_hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ 83 $(HOSTCFLAGS_$(target-stem).o) 84_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ 85 $(HOSTCXXFLAGS_$(target-stem).o) 86 87# $(objtree)/$(obj) for including generated headers from checkin source files 88ifeq ($(KBUILD_EXTMOD),) 89ifdef building_out_of_srctree 90_hostc_flags += -I $(objtree)/$(obj) 91_hostcxx_flags += -I $(objtree)/$(obj) 92endif 93endif 94 95hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags) 96hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags) 97 98##### 99# Compile programs on the host 100 101# Create executable from a single .c file 102# host-csingle -> Executable 103quiet_cmd_host-csingle = HOSTCC $@ 104 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ 105 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 106$(host-csingle): $(obj)/%: $(src)/%.c FORCE 107 $(call if_changed_dep,host-csingle) 108 109# Link an executable based on list of .o files, all plain c 110# host-cmulti -> executable 111quiet_cmd_host-cmulti = HOSTLD $@ 112 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \ 113 $(addprefix $(obj)/, $($(target-stem)-objs)) \ 114 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 115$(host-cmulti): FORCE 116 $(call if_changed,host-cmulti) 117$(call multi_depend, $(host-cmulti), , -objs) 118 119# Create .o file from a single .c file 120# host-cobjs -> .o 121quiet_cmd_host-cobjs = HOSTCC $@ 122 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< 123$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE 124 $(call if_changed_dep,host-cobjs) 125 126# Link an executable based on list of .o files, a mixture of .c and .cc 127# host-cxxmulti -> executable 128quiet_cmd_host-cxxmulti = HOSTLD $@ 129 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \ 130 $(foreach o,objs cxxobjs,\ 131 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \ 132 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 133$(host-cxxmulti): FORCE 134 $(call if_changed,host-cxxmulti) 135$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) 136 137# Create .o file from a single .cc (C++) file 138quiet_cmd_host-cxxobjs = HOSTCXX $@ 139 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< 140$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE 141 $(call if_changed_dep,host-cxxobjs) 142 143# Compile .c file, create position independent .o file 144# host-cshobjs -> .o 145quiet_cmd_host-cshobjs = HOSTCC -fPIC $@ 146 cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $< 147$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE 148 $(call if_changed_dep,host-cshobjs) 149 150# Compile .c file, create position independent .o file 151# Note that plugin capable gcc versions can be either C or C++ based 152# therefore plugin source files have to be compilable in both C and C++ mode. 153# This is why a C++ compiler is invoked on a .c file. 154# host-cxxshobjs -> .o 155quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@ 156 cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $< 157$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE 158 $(call if_changed_dep,host-cxxshobjs) 159 160# Link a shared library, based on position independent .o files 161# *.o -> .so shared library (host-cshlib) 162quiet_cmd_host-cshlib = HOSTLLD -shared $@ 163 cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ 164 $(addprefix $(obj)/, $($(target-stem)-objs)) \ 165 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so) 166$(host-cshlib): FORCE 167 $(call if_changed,host-cshlib) 168$(call multi_depend, $(host-cshlib), .so, -objs) 169 170# Link a shared library, based on position independent .o files 171# *.o -> .so shared library (host-cxxshlib) 172quiet_cmd_host-cxxshlib = HOSTLLD -shared $@ 173 cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ 174 $(addprefix $(obj)/, $($(target-stem)-objs)) \ 175 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so) 176$(host-cxxshlib): FORCE 177 $(call if_changed,host-cxxshlib) 178$(call multi_depend, $(host-cxxshlib), .so, -objs) 179 180targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ 181 $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs) 182