1# SPDX-License-Identifier: GPL-2.0 2 3$(obj)/randomize_layout_plugin.so: $(objtree)/$(obj)/randomize_layout_seed.h 4quiet_cmd_create_randomize_layout_seed = GENSEED $@ 5cmd_create_randomize_layout_seed = \ 6 $(CONFIG_SHELL) $(srctree)/$(src)/gen-random-seed.sh $@ $(objtree)/include/generated/randomize_layout_hash.h 7$(objtree)/$(obj)/randomize_layout_seed.h: FORCE 8 $(call if_changed,create_randomize_layout_seed) 9targets += randomize_layout_seed.h randomize_layout_hash.h 10 11# Build rules for plugins 12# 13# No extra code is needed for single-file plugins. 14# For multi-file plugins, use *-objs syntax to list the objects. 15# 16# If the plugin foo.so is compiled from foo.c and foo2.c, you can do: 17# 18# foo-objs := foo.o foo2.o 19 20always-y += $(GCC_PLUGIN) 21 22GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin) 23 24plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \ 25 -I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \ 26 -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \ 27 -ggdb -Wno-narrowing -Wno-unused-variable \ 28 -Wno-format-diag 29 30plugin_ldflags = -shared 31 32plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m))) 33plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN)) 34plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs)))) 35 36targets += $(plugin-single) $(plugin-multi) $(plugin-objs) 37clean-files += *.so 38 39plugin-single := $(addprefix $(obj)/, $(plugin-single)) 40plugin-multi := $(addprefix $(obj)/, $(plugin-multi)) 41plugin-objs := $(addprefix $(obj)/, $(plugin-objs)) 42 43quiet_cmd_plugin_cxx_so_c = HOSTCXX $@ 44 cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $< 45 46$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE 47 $(call if_changed_dep,plugin_cxx_so_c) 48 49quiet_cmd_plugin_ld_so_o = HOSTLD $@ 50 cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \ 51 $(addprefix $(obj)/, $($(target-stem)-objs)) 52 53$(plugin-multi): FORCE 54 $(call if_changed,plugin_ld_so_o) 55$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs))))) 56 57quiet_cmd_plugin_cxx_o_c = HOSTCXX $@ 58 cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $< 59 60$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE 61 $(call if_changed_dep,plugin_cxx_o_c) 62