aboutsummaryrefslogtreecommitdiff
path: root/rules.mak
diff options
context:
space:
mode:
authorFam Zheng <famz@redhat.com>2014-02-10 14:48:56 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2014-02-20 13:14:18 +0100
commit17969268f5938ae1d7f3dedbd73e507badb6146d (patch)
tree73132454175b7ae8096a580d278001a95aa3b8f6 /rules.mak
parent13b6ce0ec98dc0d757d5c9b50f3ce349d7af43bd (diff)
rules.mak: introduce DSO rules
Add necessary rules and flags for shared object generation. The new rules introduced here are: 1) %.o in $(common-obj-m) is compiled to %.o, then linked to %.so. 2) %.mo in $(common-obj-m) is the placeholder for %.so for pattern matching in Makefile. It's linked to "-shared" with all its dependencies (multiple *.o) as input. Which means the list of depended objects must be specified in each sub-Makefile.objs: foo.mo-objs := bar.o baz.o qux.o in the same style with foo.o-cflags and foo.o-libs. The objects here will be prefixed with "$(obj)/" if it's a subdirectory Makefile.objs. 3) For all files ending up in %.so, the following is added automatically: foo.o-cflags += -fPIC -DBUILD_DSO Also introduce --enable-modules in configure, the option will enable support of shared object build. Otherwise objects are static linked to executables. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'rules.mak')
-rw-r--r--rules.mak52
1 files changed, 43 insertions, 9 deletions
diff --git a/rules.mak b/rules.mak
index 0db703129a..0abf3d1f36 100644
--- a/rules.mak
+++ b/rules.mak
@@ -22,7 +22,12 @@ 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 $(foreach o,$1,$($o-libs)))
+maybe-add = $(filter-out $1, $2) $1
+extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)) \
+ $(foreach o,$(call expand-objs,$1),$($o-libs))))
+expand-objs = $(strip $(sort $(filter %.o,$1)) \
+ $(foreach o,$(filter %.mo,$1),$($o-objs)) \
+ $(filter-out %.o %.mo,$1))
%.o: %.c
$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@")
@@ -35,8 +40,8 @@ LINKPROG = $(or $(CXX),$(CC))
ifeq ($(LIBTOOL),)
LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
- $(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
- $(call extract-libs,$^) $(LIBS)," LINK $(TARGET_DIR)$@")
+ $(call expand-objs,$1) $(version-obj-y) \
+ $(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
else
LIBTOOL += $(if $(V),,--quiet)
%.lo: %.c
@@ -47,12 +52,12 @@ LIBTOOL += $(if $(V),,--quiet)
$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
LINK = $(call quiet-command,\
- $(if $(filter %.lo %.la,$^),$(LIBTOOL) --mode=link --tag=CC \
+ $(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
)$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
- $(sort $(filter %.o, $1)) $(filter-out %.o, $1) \
- $(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
- $(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
- $(call extract-libs,$^) $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
+ $(call expand-objs,$1) \
+ $(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
+ $(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
+ $(call extract-libs,$1) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
endif
%.asm: %.S
@@ -73,6 +78,14 @@ endif
%.o: %.dtrace
$(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
+DSO_CFLAGS := -fPIC -DBUILD_DSO
+%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
+%$(DSOSUF): %.mo libqemustub.a
+ $(call LINK,$^)
+
+.PHONY: modules
+modules:
+
%$(EXESUF): %.o
$(call LINK,$^)
@@ -166,7 +179,10 @@ $(foreach v,$($1), \
$(eval $v-cflags := )) \
$(if $($v-libs), \
$(eval $2$v-libs := $($v-libs)) \
- $(eval $v-libs := )))
+ $(eval $v-libs := )) \
+ $(if $($v-objs), \
+ $(eval $2$v-objs := $(addprefix $2,$($v-objs))) \
+ $(eval $v-objs := )))
endef
define unnest-dir
@@ -190,6 +206,22 @@ $(if $(nested-dirs),
$(call unnest-vars-1))
endef
+define process-modules
+$(foreach o,$(filter %.o,$($1)),
+ $(eval $(patsubst %.o,%.mo,$o): $o) \
+ $(eval $(patsubst %.o,%.mo,$o)-objs := $o))
+$(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \
+ $(eval $o: $($o-objs))
+ $(eval modules-objs-m += $($o-objs))
+ $(eval modules-m += $o)
+ $(eval $o:; $$(call quiet-command,touch $$@," GEN $$(TARGET_DIR)$$@"))
+ $(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \
+$(eval modules-objs-m := $(sort $(modules-objs-m)))
+$(foreach o,$(modules-objs-m), \
+ $(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags)))))
+$(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1))
+endef
+
define unnest-vars
$(eval obj := $1)
$(eval nested-vars := $2)
@@ -201,4 +233,6 @@ $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
$(foreach var,$(nested-vars), $(eval \
-include $(addsuffix *.d, $(sort $(dir $($(var)))))))
+$(foreach v,$(filter %-m,$(nested-vars)), \
+ $(call process-modules,$v))
endef