EXTRA_CFLAGS :=
EXTRA_CPPFLAGS :=
EXTRA_LDFLAGS :=
+asflags-y :=
+ccflags-y :=
+cppflags-y :=
+ldflags-y :=
-# Read .config if it exist, otherwise ignore
+# Read auto.conf if it exists, otherwise ignore
-include include/config/auto.conf
include scripts/Kbuild.include
+# For backward compatibility check that these variables do not change
+save-cflags := $(CFLAGS)
+
# The filename Kbuild has precedence over Makefile
kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile)
-
+kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
+include $(kbuild-file)
+
+# If the save-* variables changed error out
+ifeq ($(KBUILD_NOPEDANTIC),)
+ ifneq ("$(save-cflags)","$(CFLAGS)")
+ $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use EXTRA_CFLAGS)
+ endif
+endif
include scripts/Makefile.lib
ifdef host-progs
endif
endif
-# Do not include host rules unles needed
+# Do not include host rules unless needed
ifneq ($(hostprogs-y)$(hostprogs-m),)
include scripts/Makefile.host
endif
_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
endif
-
-ifdef EXTRA_TARGETS
-$(warning kbuild: $(obj)/Makefile - Usage of EXTRA_TARGETS is obsolete in 2.6. Please fix!)
-endif
-
-ifdef build-targets
-$(warning kbuild: $(obj)/Makefile - Usage of build-targets is obsolete in 2.6. Please fix!)
-endif
-
-ifdef export-objs
-$(warning kbuild: $(obj)/Makefile - Usage of export-objs is obsolete in 2.6. Please fix!)
-endif
-
-ifdef O_TARGET
-$(warning kbuild: $(obj)/Makefile - Usage of O_TARGET := $(O_TARGET) is obsolete in 2.6. Please fix!)
-endif
-
-ifdef L_TARGET
-$(error kbuild: $(obj)/Makefile - Use of L_TARGET is replaced by lib-y in 2.6. Please fix!)
-endif
-
-ifdef list-multi
-$(warning kbuild: $(obj)/Makefile - list-multi := $(list-multi) is obsolete in 2.6. Please fix!)
-endif
-
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif
builtin-target := $(obj)/built-in.o
endif
+modorder-target := $(obj)/modules.order
+
# We keep a list of all modules in $(MODVERDIR)
__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
- $(if $(KBUILD_MODULES),$(obj-m)) \
+ $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
$(subdir-ym) $(always)
@:
endif
endif
+# Do section mismatch analysis for each module/built-in.o
+ifdef CONFIG_DEBUG_SECTION_MISMATCH
+ cmd_secanalysis = ; scripts/mod/modpost $@
+endif
# Compile C sources (.c)
# ---------------------------------------------------------------------------
$(obj)/%.i: $(src)/%.c FORCE
$(call if_changed_dep,cc_i_c)
+cmd_genksyms = \
+ $(CPP) -D__GENKSYMS__ $(c_flags) $< | \
+ $(GENKSYMS) -T $@ -A -a $(ARCH) \
+ $(if $(KBUILD_PRESERVE),-p) \
+ $(if $(1),-r $(firstword $(wildcard $(@:.symtypes=.symref) /dev/null)))
+
quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
-cmd_cc_symtypes_c = \
- $(CPP) -D__GENKSYMS__ $(c_flags) $< \
- | $(GENKSYMS) -T $@ >/dev/null; \
- test -s $@ || rm -f $@
+cmd_cc_symtypes_c = \
+ set -e; \
+ $(call cmd_genksyms, true) >/dev/null; \
+ test -s $@ || rm -f $@
$(obj)/%.symtypes : $(src)/%.c FORCE
- $(call if_changed_dep,cc_symtypes_c)
+ $(call cmd,cc_symtypes_c)
# C (.c) files
# The C file is compiled and updated dependency information is generated.
else
# When module versioning is enabled the following steps are executed:
-# o compile a .tmp_<file>.o from <file>.c
-# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
-# not export symbols, we just rename .tmp_<file>.o to <file>.o and
+# o compile a .tmp_<file>.s from <file>.c
+# o if .tmp_<file>.s doesn't contain a __ksymtab version, i.e. does
+# not export symbols, we just assemble .tmp_<file>.s to <file>.o and
# are done.
# o otherwise, we calculate symbol versions using the good old
# genksyms on the preprocessed source and postprocess them in a way
-# that they are usable as a linker script
-# o generate <file>.o from .tmp_<file>.o using the linker to
-# replace the unresolved symbols __crc_exported_symbol with
-# the actual value of the checksum generated by genksyms
+# that they are usable as assembly source
+# o assemble <file>.o from .tmp_<file>.s forcing inclusion of directives
+# defining the actual values of __crc_*, followed by objcopy-ing them
+# to force these symbols to be local to permit stripping them later.
+s_file = $(@D)/.tmp_$(@F:.o=.s)
+v_file = $(@D)/.tmp_$(@F:.o=.v)
+tmp_o_file = $(@D)/.tmp_$(@F)
+no_g_c_flags = $(filter-out -g%,$(c_flags))
+
+cmd_cc_o_c = $(CC) $(c_flags) -S -o $(s_file) $<
-cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
cmd_modversions = \
- if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
- $(CPP) -D__GENKSYMS__ $(c_flags) $< \
- | $(GENKSYMS) $(if $(KBUILD_SYMTYPES), \
- -T $(@D)/$(@F:.o=.symtypes)) -a $(ARCH) \
- > $(@D)/.tmp_$(@F:.o=.ver); \
- \
- $(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
- -T $(@D)/.tmp_$(@F:.o=.ver); \
- rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
+ if grep -q __ksymtab $(s_file); then \
+ if $(call cmd_genksyms, $(KBUILD_SYMTYPES)) > $(v_file) \
+ && $(CC) $(no_g_c_flags) -c -Wa,$(v_file) \
+ -o $(tmp_o_file) $(s_file) \
+ && $(OBJCOPY) -L '__crc_*' -L '___crc_*' -w \
+ $(tmp_o_file) $@; \
+ then \
+ : ; \
+ else \
+ rm -f $@; exit 1; \
+ fi; \
else \
- mv -f $(@D)/.tmp_$(@F) $@; \
+ rm -f $(v_file); \
+ $(CC) $(no_g_c_flags) -c -o $@ $(s_file); \
fi;
endif
+ifdef CONFIG_FTRACE_MCOUNT_RECORD
+cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
+ "$(if $(CONFIG_64BIT),64,32)" \
+ "$(OBJDUMP)" "$(OBJCOPY)" "$(CC)" "$(LD)" "$(NM)" "$(RM)" "$(MV)" "$(@)";
+endif
+
define rule_cc_o_c
$(call echo-cmd,checksrc) $(cmd_checksrc) \
$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
$(cmd_modversions) \
+ $(cmd_record_mcount) \
scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \
$(dot-target).tmp; \
- rm -f $(depfile); \
+ if [ -r $(@D)/.tmp_$(@F:.o=.v) ]; then \
+ echo >> $(dot-target).tmp; \
+ echo '$@: $(GENKSYMS)' >> $(dot-target).tmp; \
+ echo '$(GENKSYMS):: ;' >> $(dot-target).tmp; \
+ fi; \
+ rm -f $(depfile) $(@D)/.tmp_$(@F:.o=.?); \
mv -f $(dot-target).tmp $(dot-target).cmd
endef
quiet_cmd_link_o_target = LD $@
# If the list of objects to link is empty, just create an empty built-in.o
cmd_link_o_target = $(if $(strip $(obj-y)),\
- $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^),\
+ $(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \
+ $(cmd_secanalysis),\
rm -f $@; $(AR) rcs $@)
$(builtin-target): $(obj-y) FORCE
endif # builtin-target
#
+# Rule to create modules.order file
+#
+# Create commands to either record .ko file or cat modules.order from
+# a subdirectory
+modorder-cmds = \
+ $(foreach m, $(modorder), \
+ $(if $(filter %/modules.order, $m), \
+ cat $m;, echo kernel/$m;))
+
+$(modorder-target): $(subdir-ym) FORCE
+ $(Q)(cat /dev/null; $(modorder-cmds)) > $@
+
+#
# Rule to compile a set of .o files into one .a file
#
ifdef lib-target
$($(subst $(obj)/,,$(@:.o=-y)))), $^)
quiet_cmd_link_multi-y = LD $@
-cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps)
+cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
quiet_cmd_link_multi-m = LD [M] $@
cmd_link_multi-m = $(cmd_link_multi-y)
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