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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/scripts/Makefile.host
....@@ -1,4 +1,21 @@
11 # SPDX-License-Identifier: GPL-2.0
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+
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+# LEX
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+# ---------------------------------------------------------------------------
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+quiet_cmd_flex = LEX     $@
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+      cmd_flex = $(LEX) -o$@ -L $<
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+
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+$(obj)/%.lex.c: $(src)/%.l FORCE
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+	$(call if_changed,flex)
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+
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+# YACC
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+# ---------------------------------------------------------------------------
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+quiet_cmd_bison = YACC    $(basename $@).[ch]
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+      cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
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+
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+$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
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+	$(call if_changed,bison)
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+
219 # ==========================================================================
320 # Building binaries on the host system
421 # Binaries are used during the compilation of the kernel, for example
....@@ -6,77 +23,65 @@
623 #
724 # Both C and C++ are supported, but preferred language is C for such utilities.
825 #
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-# Sample syntax (see Documentation/kbuild/makefiles.txt for reference)
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-# hostprogs-y := bin2hex
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+# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
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+# hostprogs := bin2hex
1128 # Will compile bin2hex.c and create an executable named bin2hex
1229 #
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-# hostprogs-y    := lxdialog
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+# hostprogs     := lxdialog
1431 # lxdialog-objs := checklist.o lxdialog.o
1532 # Will compile lxdialog.c and checklist.c, and then link the executable
1633 # lxdialog, based on checklist.o and lxdialog.o
1734 #
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-# hostprogs-y      := qconf
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+# hostprogs       := qconf
1936 # qconf-cxxobjs   := qconf.o
2037 # qconf-objs      := menu.o
2138 # Will compile qconf as a C++ program, and menu as a C program.
2239 # They are linked as C++ code to the executable qconf
2340 
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-__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
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-host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
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-host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
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-
2841 # C code
2942 # Executables compiled from a single .c file
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-host-csingle	:= $(foreach m,$(__hostprogs), \
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+host-csingle	:= $(foreach m,$(hostprogs), \
3144 			$(if $($(m)-objs)$($(m)-cxxobjs),,$(m)))
3245 
3346 # C executables linked based on several .o files
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-host-cmulti	:= $(foreach m,$(__hostprogs),\
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+host-cmulti	:= $(foreach m,$(hostprogs),\
3548 		   $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
3649 
3750 # Object (.o) files compiled from .c files
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-host-cobjs	:= $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
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+host-cobjs	:= $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
3952 
4053 # C++ code
4154 # C++ executables compiled from at least one .cc file
4255 # and zero or more .c files
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-host-cxxmulti	:= $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
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+host-cxxmulti	:= $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
4457 
4558 # C++ Object (.o) files compiled from .cc files
4659 host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
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-
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-# Object (.o) files used by the shared libaries
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-host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
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-host-cxxshobjs	:= $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
5160 
5261 host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
5362 host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
5463 host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
5564 host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
5665 host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
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-host-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
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-host-cxxshlib	:= $(addprefix $(obj)/,$(host-cxxshlib))
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-host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
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-host-cxxshobjs	:= $(addprefix $(obj)/,$(host-cxxshobjs))
6166 
6267 #####
6368 # Handle options to gcc. Support building with separate output directory
6469 
6570 _hostc_flags   = $(KBUILD_HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
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-                 $(HOSTCFLAGS_$(basetarget).o)
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+                 $(HOSTCFLAGS_$(target-stem).o)
6772 _hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
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-                 $(HOSTCXXFLAGS_$(basetarget).o)
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+                 $(HOSTCXXFLAGS_$(target-stem).o)
6974 
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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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+# $(objtree)/$(obj) for including generated headers from checkin source files
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+ifeq ($(KBUILD_EXTMOD),)
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+ifdef building_out_of_srctree
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+_hostc_flags   += -I $(objtree)/$(obj)
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+_hostcxx_flags += -I $(objtree)/$(obj)
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+endif
7681 endif
7782 
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-hostc_flags    = -Wp,-MD,$(depfile) $(__hostc_flags)
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-hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
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+hostc_flags    = -Wp,-MMD,$(depfile) $(_hostc_flags)
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+hostcxx_flags  = -Wp,-MMD,$(depfile) $(_hostcxx_flags)
8085 
8186 #####
8287 # Compile programs on the host
....@@ -85,7 +90,7 @@
8590 # host-csingle -> Executable
8691 quiet_cmd_host-csingle 	= HOSTCC  $@
8792       cmd_host-csingle	= $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
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-		$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
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+		$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
8994 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
9095 	$(call if_changed_dep,host-csingle)
9196 
....@@ -93,8 +98,8 @@
9398 # host-cmulti -> executable
9499 quiet_cmd_host-cmulti	= HOSTLD  $@
95100       cmd_host-cmulti	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
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-			  $(addprefix $(obj)/,$($(@F)-objs)) \
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-			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
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+			  $(addprefix $(obj)/, $($(target-stem)-objs)) \
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+			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
98103 $(host-cmulti): FORCE
99104 	$(call if_changed,host-cmulti)
100105 $(call multi_depend, $(host-cmulti), , -objs)
....@@ -111,8 +116,8 @@
111116 quiet_cmd_host-cxxmulti	= HOSTLD  $@
112117       cmd_host-cxxmulti	= $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
113118 			  $(foreach o,objs cxxobjs,\
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-			  $(addprefix $(obj)/,$($(@F)-$(o)))) \
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-			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
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+			  $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
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+			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
116121 $(host-cxxmulti): FORCE
117122 	$(call if_changed,host-cxxmulti)
118123 $(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
....@@ -123,42 +128,5 @@
123128 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
124129 	$(call if_changed_dep,host-cxxobjs)
125130 
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-# Compile .c file, create position independent .o file
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-# host-cshobjs -> .o
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-quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
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-      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
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-$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
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-	$(call if_changed_dep,host-cshobjs)
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-
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-# Compile .c file, create position independent .o file
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-# Note that plugin capable gcc versions can be either C or C++ based
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-# therefore plugin source files have to be compilable in both C and C++ mode.
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-# This is why a C++ compiler is invoked on a .c file.
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-# host-cxxshobjs -> .o
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-quiet_cmd_host-cxxshobjs	= HOSTCXX -fPIC $@
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-      cmd_host-cxxshobjs	= $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $<
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-$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
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-	$(call if_changed_dep,host-cxxshobjs)
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-
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-# Link a shared library, based on position independent .o files
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-# *.o -> .so shared library (host-cshlib)
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-quiet_cmd_host-cshlib	= HOSTLLD -shared $@
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-      cmd_host-cshlib	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
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-			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
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-			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
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-$(host-cshlib): FORCE
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-	$(call if_changed,host-cshlib)
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-$(call multi_depend, $(host-cshlib), .so, -objs)
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-
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-# Link a shared library, based on position independent .o files
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-# *.o -> .so shared library (host-cxxshlib)
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-quiet_cmd_host-cxxshlib	= HOSTLLD -shared $@
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-      cmd_host-cxxshlib	= $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
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-			  $(addprefix $(obj)/,$($(@F:.so=-objs))) \
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-			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F))
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-$(host-cxxshlib): FORCE
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-	$(call if_changed,host-cxxshlib)
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-$(call multi_depend, $(host-cxxshlib), .so, -objs)
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-
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-targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
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-	   $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)
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+targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
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+	   $(host-cxxmulti) $(host-cxxobjs)