| 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | |
| 3 | # LEX |
| 4 | # --------------------------------------------------------------------------- |
| 5 | quiet_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 | # --------------------------------------------------------------------------- |
| 13 | quiet_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)) |
| 42 | |
| 43 | # C code |
| 44 | # Executables compiled from a single .c file |
| 45 | host-csingle := $(foreach m,$(__hostprogs), \ |
| 46 | $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) |
| 47 | |
| 48 | # C executables linked based on several .o files |
| 49 | host-cmulti := $(foreach m,$(__hostprogs),\ |
| 50 | $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m)))) |
| 51 | |
| 52 | # Object (.o) files compiled from .c files |
| 53 | host-cobjs := $(sort $(foreach m,$(__hostprogs),$($(m)-objs))) |
| 54 | |
| 55 | # C++ code |
| 56 | # C++ executables compiled from at least one .cc file |
| 57 | # and zero or more .c files |
| 58 | host-cxxmulti := $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m))) |
| 59 | |
| 60 | # C++ Object (.o) files compiled from .cc files |
| 61 | host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs))) |
| 62 | |
| 63 | host-csingle := $(addprefix $(obj)/,$(host-csingle)) |
| 64 | host-cmulti := $(addprefix $(obj)/,$(host-cmulti)) |
| 65 | host-cobjs := $(addprefix $(obj)/,$(host-cobjs)) |
| 66 | host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti)) |
| 67 | host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs)) |
| 68 | |
| 69 | ##### |
| 70 | # Handle options to gcc. Support building with separate output directory |
| 71 | |
| 72 | _hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ |
| 73 | $(HOSTCFLAGS_$(target-stem).o) |
| 74 | _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ |
| 75 | $(HOSTCXXFLAGS_$(target-stem).o) |
| 76 | |
| 77 | # $(objtree)/$(obj) for including generated headers from checkin source files |
| 78 | ifeq ($(KBUILD_EXTMOD),) |
| 79 | ifdef building_out_of_srctree |
| 80 | _hostc_flags += -I $(objtree)/$(obj) |
| 81 | _hostcxx_flags += -I $(objtree)/$(obj) |
| 82 | endif |
| 83 | endif |
| 84 | |
| 85 | hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags) |
| 86 | hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags) |
| 87 | |
| 88 | ##### |
| 89 | # Compile programs on the host |
| 90 | |
| 91 | # Create executable from a single .c file |
| 92 | # host-csingle -> Executable |
| 93 | quiet_cmd_host-csingle = HOSTCC $@ |
| 94 | cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \ |
| 95 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) |
| 96 | $(host-csingle): $(obj)/%: $(src)/%.c FORCE |
| 97 | $(call if_changed_dep,host-csingle) |
| 98 | |
| 99 | # Link an executable based on list of .o files, all plain c |
| 100 | # host-cmulti -> executable |
| 101 | quiet_cmd_host-cmulti = HOSTLD $@ |
| 102 | cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \ |
| 103 | $(addprefix $(obj)/, $($(target-stem)-objs)) \ |
| 104 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) |
| 105 | $(host-cmulti): FORCE |
| 106 | $(call if_changed,host-cmulti) |
| 107 | $(call multi_depend, $(host-cmulti), , -objs) |
| 108 | |
| 109 | # Create .o file from a single .c file |
| 110 | # host-cobjs -> .o |
| 111 | quiet_cmd_host-cobjs = HOSTCC $@ |
| 112 | cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $< |
| 113 | $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE |
| 114 | $(call if_changed_dep,host-cobjs) |
| 115 | |
| 116 | # Link an executable based on list of .o files, a mixture of .c and .cc |
| 117 | # host-cxxmulti -> executable |
| 118 | quiet_cmd_host-cxxmulti = HOSTLD $@ |
| 119 | cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \ |
| 120 | $(foreach o,objs cxxobjs,\ |
| 121 | $(addprefix $(obj)/, $($(target-stem)-$(o)))) \ |
| 122 | $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem)) |
| 123 | $(host-cxxmulti): FORCE |
| 124 | $(call if_changed,host-cxxmulti) |
| 125 | $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs) |
| 126 | |
| 127 | # Create .o file from a single .cc (C++) file |
| 128 | quiet_cmd_host-cxxobjs = HOSTCXX $@ |
| 129 | cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $< |
| 130 | $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE |
| 131 | $(call if_changed_dep,host-cxxobjs) |
| 132 | |
| 133 | targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \ |
| 134 | $(host-cxxmulti) $(host-cxxobjs) |