+COMMA := ,
+
# Don't use implicit rules or variables
# we have explicit rules for everything
MAKEFLAGS += -rR
QEMU_CXXFLAGS = -D__STDC_LIMIT_MACROS $(filter-out -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wold-style-declaration -Wold-style-definition -Wredundant-decls, $(QEMU_CFLAGS))
# Flags for dependency generation
-QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
+QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(@D)/$(*F).d
# Same as -I$(SRC_PATH) -I., but for the nested source/object directories
QEMU_INCLUDES += -I$(<D) -I$(@D)
-extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs))))
+WL_U := -Wl,-u,
+find-symbols = $(if $1, $(sort $(shell $(NM) -P -g $1 | $2)))
+defined-symbols = $(call find-symbols,$1,awk '$$2!="U"{print $$1}')
+undefined-symbols = $(call find-symbols,$1,awk '$$2=="U"{print $$1}')
+
+# All the .mo objects in -m variables are also added into corresponding -y
+# variable in unnest-vars, but filtered out here, when LINK is called.
+#
+# The .mo objects are supposed to be linked as a DSO, for module build. So here
+# they are only used as a placeholders to generate those "archive undefined"
+# symbol options (-Wl,-u,$symbol_name), which are the archive functions
+# referenced by the code in the DSO.
+#
+# Also the presence in -y variables will also guarantee they are built before
+# linking executables that will load them. So we can look up symbol reference
+# in LINK.
+#
+# This is necessary because the exectuable itself may not use the function, in
+# which case the function would not be linked in. Then the DSO loading will
+# fail because of the missing symbol.
+process-archive-undefs = $(filter-out %.a %.mo,$1) \
+ $(addprefix $(WL_U), \
+ $(filter $(call defined-symbols,$(filter %.a, $1)), \
+ $(call undefined-symbols,$(filter %.mo,$1)))) \
+ $(filter %.a,$1)
+
+extract-libs = $(strip $(foreach o,$1,$($o-libs)))
expand-objs = $(strip $(sort $(filter %.o,$1)) \
$(foreach o,$(filter %.mo,$1),$($o-objs)) \
$(filter-out %.o %.mo,$1))
# must link with the C++ compiler, not the plain C compiler.
LINKPROG = $(or $(CXX),$(CC))
-ifeq ($(LIBTOOL),)
LINK = $(call quiet-command, $(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
- $1 $(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
-else
-LIBTOOL += $(if $(V),,--quiet)
-%.lo: %.c
- $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC $(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($*.o-cflags) -c -o $@ $<," lt CC $@")
-%.lo: %.rc
- $(call quiet-command,$(LIBTOOL) --mode=compile --tag=RC $(WINDRES) -I. -o $@ $<,"lt RC $(TARGET_DIR)$@")
-%.lo: %.dtrace
- $(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
-
-LINK = $(call quiet-command,\
- $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
- )$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ $1 \
- $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
- $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
- $(call extract-libs,$(1:.lo=.o)) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
-endif
-
-%.asm: %.S
- $(call quiet-command,$(CPP) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -o $@ $<," CPP $(TARGET_DIR)$@")
-
-%.o: %.asm
- $(call quiet-command,$(AS) $(ASFLAGS) -o $@ $<," AS $(TARGET_DIR)$@")
+ $(call process-archive-undefs, $1) \
+ $(version-obj-y) $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
+
+%.o: %.S
+ $(call quiet-command,$(CCAS) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<," CCAS $(TARGET_DIR)$@")
%.o: %.cc
$(call quiet-command,$(CXX) $(QEMU_INCLUDES) $(QEMU_CXXFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CXX $(TARGET_DIR)$@")
%.o: %.dtrace
$(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
-%$(DSOSUF): CFLAGS += -fPIC -DBUILD_DSO
+DSO_OBJ_CFLAGS := -fPIC -DBUILD_DSO
+module-common.o: CFLAGS += $(DSO_OBJ_CFLAGS)
%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
-%$(DSOSUF):
+%$(DSOSUF): %.mo
$(call LINK,$^)
@# Copy to build root so modules can be loaded when program started without install
$(if $(findstring /,$@),$(call quiet-command,cp $@ $(subst /,-,$@), " CP $(subst /,-,$@)"))
+
+LD_REL := $(CC) -nostdlib -Wl,-r $(LD_REL_FLAGS)
+
+%.mo:
+ $(call quiet-command,$(LD_REL) -o $@ $^," LD -r $(TARGET_DIR)$@")
+
.PHONY: modules
modules:
%$(EXESUF): %.o
- $(call LINK,$^)
+ $(call LINK,$(filter %.o %.a %.mo, $^))
%.a:
$(call quiet-command,rm -f $@ && $(AR) rcs $@ $^," AR $(TARGET_DIR)$@")
cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
>/dev/null 2>&1 && echo OK), $2, $3)
+cc-c-option = $(if $(shell $(CC) $1 $2 -c -o /dev/null -xc /dev/null \
+ >/dev/null 2>&1 && echo OK), $2, $3)
VPATH_SUFFIXES = %.c %.h %.S %.cc %.cpp %.m %.mak %.texi %.sh %.rc
set-vpath = $(if $1,$(foreach PATTERN,$(VPATH_SUFFIXES),$(eval vpath $(PATTERN) $1)))
+# install-prog list, dir
+define install-prog
+ $(INSTALL_DIR) "$2"
+ $(INSTALL_PROG) $1 "$2"
+ $(if $(STRIP),$(STRIP) $(foreach T,$1,"$2/$(notdir $T)"),)
+endef
+
# find-in-path
# Usage: $(call find-in-path, prog)
# Looks in the PATH if the argument contains no slash, else only considers one
config-%.h: config-%.h-timestamp
@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-config-%.h-timestamp: config-%.mak
+config-%.h-timestamp: config-%.mak $(SRC_PATH)/scripts/create_config
$(call quiet-command, sh $(SRC_PATH)/scripts/create_config < $< > $@, " GEN $(TARGET_DIR)config-$*.h")
.PHONY: clean-timestamp
$(if $1,$(call fix-paths,$1/,,$2))
# Descend and include every subdir Makefile.objs
- $(foreach v, $2, $(call unnest-var-recursive,$1,$2,$v))
+ $(foreach v, $2,
+ $(call unnest-var-recursive,$1,$2,$v)
+ # Pass the .mo-cflags and .mo-libs along to its member objects
+ $(foreach o, $(filter %.mo,$($v)),
+ $(foreach p,$($o-objs),
+ $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
+ $(if $($o-libs), $(eval $p-libs += $($o-libs))))))
+
+ # For all %.mo objects that are directly added into -y, just expand them
+ $(foreach v,$(filter %-y,$2),
+ $(eval $v := $(foreach o,$($v),$(if $($o-objs),$($o-objs),$o))))
$(foreach v,$(filter %-m,$2),
# All .o found in *-m variables are single object modules, create .mo
# For module build, build shared libraries during "make modules"
# For non-module build, add -m to -y
$(if $(CONFIG_MODULES),
+ $(foreach o,$($v),
+ $(eval $($o-objs): CFLAGS += $(DSO_OBJ_CFLAGS))
+ $(eval $o: $($o-objs)))
+ $(eval $(patsubst %-m,%-y,$v) += $($v))
$(eval modules: $($v:%.mo=%$(DSOSUF))),
$(eval $(patsubst %-m,%-y,$v) += $(call expand-objs, $($v)))))
# according to .mo-objs. Report error if not set
$(if $($o-objs),
$(eval $(o:%.mo=%$(DSOSUF)): module-common.o $($o-objs)),
- $(error $o added in $v but $o-objs is not set))
- # Pass the .mo-cflags and .mo-libs along to member objects
- $(foreach p,$($o-objs),
- $(if $($o-cflags), $(eval $p-cflags += $($o-cflags)))
- $(if $($o-libs), $(eval $p-libs += $($o-libs)))))
+ $(error $o added in $v but $o-objs is not set)))
$(shell mkdir -p ./ $(sort $(dir $($v))))
# Include all the .d files
- $(eval -include $(addsuffix *.d, $(sort $(dir $($v)))))
+ $(eval -include $(patsubst %.o,%.d,$(patsubst %.mo,%.d,$($v))))
$(eval $v := $(filter-out %/,$($v))))
endef
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