mirror of https://gitee.com/openkylin/qemu.git
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>
This commit is contained in:
Fam Zheng
Paolo Bonzini
parent
13b6ce0ec9
commit
17969268f5
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@ -64,6 +64,9 @@ libuser
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*.cp
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*.dvi
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*.exe
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*.dll
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*.so
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*.mo
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*.fn
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*.ky
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*.log
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4
Makefile
4
Makefile
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@ -138,7 +138,7 @@ ifeq ($(CONFIG_SMARTCARD_NSS),y)
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include $(SRC_PATH)/libcacard/Makefile
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endif
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all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all
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all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all modules
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vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
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@ -256,6 +256,8 @@ clean:
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rm -f qemu-options.def
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find . -name '*.[oda]' -type f -exec rm -f {} +
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find . -name '*.l[oa]' -type f -exec rm -f {} +
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find . -name '*$(DSOSUF)' -type f -exec rm -f {} +
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find . -name '*.mo' -type f -exec rm -f {} +
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rm -f $(filter-out %.tlb,$(TOOLS)) $(HELPERS-y) qemu-ga TAGS cscope.* *.pod *~ */*~
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rm -f fsdev/*.pod
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rm -rf .libs */.libs
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@ -205,6 +205,9 @@ mingw32="no"
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gcov="no"
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gcov_tool="gcov"
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EXESUF=""
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DSOSUF=".so"
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LDFLAGS_SHARED="-shared"
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modules="no"
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prefix="/usr/local"
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mandir="\${prefix}/share/man"
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datadir="\${prefix}/share"
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@ -515,6 +518,7 @@ OpenBSD)
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Darwin)
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bsd="yes"
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darwin="yes"
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LDFLAGS_SHARED="-bundle -undefined dynamic_lookup"
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if [ "$cpu" = "x86_64" ] ; then
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QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
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LDFLAGS="-arch x86_64 $LDFLAGS"
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@ -608,6 +612,7 @@ fi
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if test "$mingw32" = "yes" ; then
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EXESUF=".exe"
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DSOSUF=".dll"
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QEMU_CFLAGS="-DWIN32_LEAN_AND_MEAN -DWINVER=0x501 $QEMU_CFLAGS"
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# enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later)
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QEMU_CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $QEMU_CFLAGS"
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@ -674,6 +679,9 @@ for opt do
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;;
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--disable-debug-info)
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;;
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--enable-modules)
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modules="yes"
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;;
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--cpu=*)
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;;
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--target-list=*) target_list="$optarg"
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@ -1130,6 +1138,7 @@ Advanced options (experts only):
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--sysconfdir=PATH install config in PATH$confsuffix
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--localstatedir=PATH install local state in PATH (set at runtime on win32)
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--with-confsuffix=SUFFIX suffix for QEMU data inside datadir and sysconfdir [$confsuffix]
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--enable-modules enable modules support
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--enable-debug-tcg enable TCG debugging
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--disable-debug-tcg disable TCG debugging (default)
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--enable-debug-info enable debugging information (default)
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@ -3768,6 +3777,7 @@ echo "python $python"
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if test "$slirp" = "yes" ; then
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echo "smbd $smbd"
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fi
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echo "module support $modules"
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echo "host CPU $cpu"
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echo "host big endian $bigendian"
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echo "target list $target_list"
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@ -4012,6 +4022,9 @@ echo "TARGET_DIRS=$target_list" >> $config_host_mak
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if [ "$docs" = "yes" ] ; then
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echo "BUILD_DOCS=yes" >> $config_host_mak
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fi
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if test "$modules" = "yes"; then
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echo "CONFIG_MODULES=y" >> $config_host_mak
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fi
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if test "$sdl" = "yes" ; then
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echo "CONFIG_SDL=y" >> $config_host_mak
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echo "SDL_CFLAGS=$sdl_cflags" >> $config_host_mak
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@ -4396,6 +4409,8 @@ echo "LIBTOOLFLAGS=$LIBTOOLFLAGS" >> $config_host_mak
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echo "LIBS+=$LIBS" >> $config_host_mak
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echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
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echo "EXESUF=$EXESUF" >> $config_host_mak
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echo "DSOSUF=$DSOSUF" >> $config_host_mak
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echo "LDFLAGS_SHARED=$LDFLAGS_SHARED" >> $config_host_mak
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echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
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echo "POD2MAN=$POD2MAN" >> $config_host_mak
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echo "TRANSLATE_OPT_CFLAGS=$TRANSLATE_OPT_CFLAGS" >> $config_host_mak
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52
rules.mak
52
rules.mak
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@ -22,7 +22,12 @@ QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
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# Same as -I$(SRC_PATH) -I., but for the nested source/object directories
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QEMU_INCLUDES += -I$(<D) -I$(@D)
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extract-libs = $(strip $(foreach o,$1,$($o-libs)))
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maybe-add = $(filter-out $1, $2) $1
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extract-libs = $(strip $(sort $(foreach o,$1,$($o-libs)) \
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$(foreach o,$(call expand-objs,$1),$($o-libs))))
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expand-objs = $(strip $(sort $(filter %.o,$1)) \
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$(foreach o,$(filter %.mo,$1),$($o-objs)) \
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$(filter-out %.o %.mo,$1))
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%.o: %.c
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$(call quiet-command,$(CC) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) $(CFLAGS) $($@-cflags) -c -o $@ $<," CC $(TARGET_DIR)$@")
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@ -35,8 +40,8 @@ LINKPROG = $(or $(CXX),$(CC))
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ifeq ($(LIBTOOL),)
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LINK = $(call quiet-command,$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
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$(sort $(filter %.o, $1)) $(filter-out %.o, $1) $(version-obj-y) \
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$(call extract-libs,$^) $(LIBS)," LINK $(TARGET_DIR)$@")
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$(call expand-objs,$1) $(version-obj-y) \
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$(call extract-libs,$1) $(LIBS)," LINK $(TARGET_DIR)$@")
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else
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LIBTOOL += $(if $(V),,--quiet)
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%.lo: %.c
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@ -47,12 +52,12 @@ LIBTOOL += $(if $(V),,--quiet)
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$(call quiet-command,$(LIBTOOL) --mode=compile --tag=CC dtrace -o $@ -G -s $<, " lt GEN $(TARGET_DIR)$@")
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LINK = $(call quiet-command,\
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$(if $(filter %.lo %.la,$^),$(LIBTOOL) --mode=link --tag=CC \
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$(if $(filter %.lo %.la,$1),$(LIBTOOL) --mode=link --tag=CC \
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)$(LINKPROG) $(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS) -o $@ \
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$(sort $(filter %.o, $1)) $(filter-out %.o, $1) \
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$(if $(filter %.lo %.la,$^),$(version-lobj-y),$(version-obj-y)) \
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$(if $(filter %.lo %.la,$^),$(LIBTOOLFLAGS)) \
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$(call extract-libs,$^) $(LIBS),$(if $(filter %.lo %.la,$^),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
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$(call expand-objs,$1) \
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$(if $(filter %.lo %.la,$1),$(version-lobj-y),$(version-obj-y)) \
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$(if $(filter %.lo %.la,$1),$(LIBTOOLFLAGS)) \
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$(call extract-libs,$1) $(LIBS),$(if $(filter %.lo %.la,$1),"lt LINK ", " LINK ")"$(TARGET_DIR)$@")
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endif
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%.asm: %.S
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@ -73,6 +78,14 @@ endif
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%.o: %.dtrace
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$(call quiet-command,dtrace -o $@ -G -s $<, " GEN $(TARGET_DIR)$@")
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DSO_CFLAGS := -fPIC -DBUILD_DSO
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%$(DSOSUF): LDFLAGS += $(LDFLAGS_SHARED)
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%$(DSOSUF): %.mo libqemustub.a
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$(call LINK,$^)
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.PHONY: modules
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modules:
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%$(EXESUF): %.o
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$(call LINK,$^)
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@ -166,7 +179,10 @@ $(foreach v,$($1), \
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$(eval $v-cflags := )) \
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$(if $($v-libs), \
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$(eval $2$v-libs := $($v-libs)) \
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$(eval $v-libs := )))
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$(eval $v-libs := )) \
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$(if $($v-objs), \
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$(eval $2$v-objs := $(addprefix $2,$($v-objs))) \
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$(eval $v-objs := )))
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endef
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define unnest-dir
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@ -190,6 +206,22 @@ $(if $(nested-dirs),
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$(call unnest-vars-1))
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endef
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define process-modules
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$(foreach o,$(filter %.o,$($1)),
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$(eval $(patsubst %.o,%.mo,$o): $o) \
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$(eval $(patsubst %.o,%.mo,$o)-objs := $o))
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$(foreach o,$(filter-out $(modules-m), $(patsubst %.o,%.mo,$($1))), \
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$(eval $o: $($o-objs))
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$(eval modules-objs-m += $($o-objs))
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$(eval modules-m += $o)
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$(eval $o:; $$(call quiet-command,touch $$@," GEN $$(TARGET_DIR)$$@"))
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$(if $(CONFIG_MODULES),$(eval modules: $(patsubst %.mo,%$(DSOSUF),$o)))) \
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$(eval modules-objs-m := $(sort $(modules-objs-m)))
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$(foreach o,$(modules-objs-m), \
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$(if $(CONFIG_MODULES),$(eval $o-cflags := $(call maybe-add, $(DSO_CFLAGS), $($o-cflags)))))
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$(eval $(patsubst %-m,%-$(call lnot,$(CONFIG_MODULES)),$1) += $($1))
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endef
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define unnest-vars
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$(eval obj := $1)
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$(eval nested-vars := $2)
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@ -201,4 +233,6 @@ $(foreach var,$(nested-vars),$(eval $(var) := $(filter-out %/, $($(var)))))
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$(shell mkdir -p $(sort $(foreach var,$(nested-vars),$(dir $($(var))))))
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$(foreach var,$(nested-vars), $(eval \
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-include $(addsuffix *.d, $(sort $(dir $($(var)))))))
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$(foreach v,$(filter %-m,$(nested-vars)), \
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$(call process-modules,$v))
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endef
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