# SPDX-License-Identifier: GPL-2.0 $(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h quiet_cmd_create_randomize_layout_seed = SEEDHDR $@ cmd_create_randomize_layout_seed = \ SEED=$$(cat $(filter-out FORCE,$^) $@; \ echo ' * This file is automatically generated. Keep it private.' >> $@; \ echo ' * Exposing this value will expose the layout of randomized structures.' >> $@; \ echo ' */' >> $@; \ echo "const char *randstruct_seed = \"$$SEED\";" >> $@ $(obj)/randomize_layout_seed.h: $(objtree)/scripts/basic/randstruct.seed FORCE $(call if_changed,create_randomize_layout_seed) targets += randomize_layout_seed.h # Build rules for plugins # # No extra code is needed for single-file plugins. # For multi-file plugins, use *-objs syntax to list the objects. # # If the plugin foo.so is compiled from foo.c and foo2.c, you can do: # # foo-objs := foo.o foo2.o always-y += $(GCC_PLUGIN) GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ -include $(srctree)/include/linux/compiler-version.h \ -include $(objtree)/include/generated/utsrelease.h \ -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \ -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ -ggdb -Wno-narrowing -Wno-unused-variable \ -Wno-format-diag plugin_ldflags = -shared plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m))) plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN)) plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs)))) targets += $(plugin-single) $(plugin-multi) $(plugin-objs) clean-files += *.so plugin-single := $(addprefix $(obj)/, $(plugin-single)) plugin-multi := $(addprefix $(obj)/, $(plugin-multi)) plugin-objs := $(addprefix $(obj)/, $(plugin-objs)) quiet_cmd_plugin_cxx_so_c = HOSTCXX $@ cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $< $(plugin-single): $(obj)/%.so: $(src)/%.c FORCE $(call if_changed_dep,plugin_cxx_so_c) quiet_cmd_plugin_ld_so_o = HOSTLD $@ cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \ $(addprefix $(obj)/, $($(target-stem)-objs)) $(plugin-multi): FORCE $(call if_changed,plugin_ld_so_o) $(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs))))) quiet_cmd_plugin_cxx_o_c = HOSTCXX $@ cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $< $(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE $(call if_changed_dep,plugin_cxx_o_c)