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 := bin2hex 28# Will compile bin2hex.c and create an executable named bin2hex 29# 30# hostprogs := 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 := 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)) 42host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m)) 43 44# C code 45# Executables compiled from a single .c file 46host-csingle := $(foreach m,$(__hostprogs), \ 47 $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) 48 49# C executables linked based on several .o files 50host-cmulti := $(foreach m,$(__hostprogs),\ 51 $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) 52 53# Object (.o) files compiled from .c files 54host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) 55 56# C++ code 57# C++ executables compiled from at least one .cc file 58# and zero or more .c files 59host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) 60 61# C++ Object (.o) files compiled from .cc files 62host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) 63 64# Object (.o) files used by the shared libaries 65host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs)))) 66 67host-csingle := $(addprefix $(obj)/,$(host-csingle)) 68host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) 69host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) 70host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) 71host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) 72host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib)) 73host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs)) 74 75##### 76# Handle options to gcc. Support building with separate output directory 77 78_hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ 79 $(HOSTCFLAGS_$(target-stem).o) 80_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ 81 $(HOSTCXXFLAGS_$(target-stem).o) 82 83# $(objtree)/$(obj) for including generated headers from checkin source files 84ifeq ($(KBUILD_EXTMOD),) 85ifdef building_out_of_srctree 86_hostc_flags += -I $(objtree)/$(obj) 87_hostcxx_flags += -I $(objtree)/$(obj) 88endif 89endif 90 91hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags) 92hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags) 93 94##### 95# Compile programs on the host 96 97# Create executable from a single .c file 98# host-csingle -> Executable 99quiet_cmd_host-csingle = HOSTCC $@ 100 cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ 101 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 102$(host-csingle): $(obj)/%: $(src)/%.c FORCE 103 $(call if_changed_dep,host-csingle) 104 105# Link an executable based on list of .o files, all plain c 106# host-cmulti -> executable 107quiet_cmd_host-cmulti = HOSTLD $@ 108 cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \ 109 $(addprefix $(obj)/, $($(target-stem)-objs)) \ 110 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 111$(host-cmulti): FORCE 112 $(call if_changed,host-cmulti) 113$(call multi_depend, $(host-cmulti), , -objs) 114 115# Create .o file from a single .c file 116# host-cobjs -> .o 117quiet_cmd_host-cobjs = HOSTCC $@ 118 cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< 119$(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE 120 $(call if_changed_dep,host-cobjs) 121 122# Link an executable based on list of .o files, a mixture of .c and .cc 123# host-cxxmulti -> executable 124quiet_cmd_host-cxxmulti = HOSTLD $@ 125 cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \ 126 $(foreach o,objs cxxobjs,\ 127 $(addprefix $(obj)/, $($(target-stem)-$(o)))) \ 128 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) 129$(host-cxxmulti): FORCE 130 $(call if_changed,host-cxxmulti) 131$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) 132 133# Create .o file from a single .cc (C++) file 134quiet_cmd_host-cxxobjs = HOSTCXX $@ 135 cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< 136$(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE 137 $(call if_changed_dep,host-cxxobjs) 138 139# Compile .c file, create position independent .o file 140# Note that plugin capable gcc versions can be either C or C++ based 141# therefore plugin source files have to be compilable in both C and C++ mode. 142# This is why a C++ compiler is invoked on a .c file. 143# host-cxxshobjs -> .o 144quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@ 145 cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $< 146$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE 147 $(call if_changed_dep,host-cxxshobjs) 148 149# Link a shared library, based on position independent .o files 150# *.o -> .so shared library (host-cxxshlib) 151quiet_cmd_host-cxxshlib = HOSTLLD -shared $@ 152 cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ 153 $(addprefix $(obj)/, $($(target-stem)-objs)) \ 154 $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so) 155$(host-cxxshlib): FORCE 156 $(call if_changed,host-cxxshlib) 157$(call multi_depend, $(host-cxxshlib), .so, -objs) 158 159targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ 160 $(host-cxxmulti) $(host-cxxobjs) $(host-cxxshlib) $(host-cxxshobjs) 161