Commit 17969268 authored by Fam Zheng's avatar Fam Zheng Committed by Paolo Bonzini

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: default avatarFam Zheng <famz@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 13b6ce0e
......@@ -64,6 +64,9 @@ libuser
*.cp
*.dvi
*.exe
*.dll
*.so
*.mo
*.fn
*.ky
*.log
......
......@@ -138,7 +138,7 @@ ifeq ($(CONFIG_SMARTCARD_NSS),y)
include $(SRC_PATH)/libcacard/Makefile
endif
all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all
all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all modules
vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
......@@ -256,6 +256,8 @@ clean:
rm -f qemu-options.def
find . -name '*.[oda]' -type f -exec rm -f {} +
find . -name '*.l[oa]' -type f -exec rm -f {} +
find . -name '*$(DSOSUF)' -type f -exec rm -f {} +
find . -name '*.mo' -type f -exec rm -f {} +
rm -f $(filter-out %.tlb,$(TOOLS)) $(HELPERS-y) qemu-ga TAGS cscope.* *.pod *~ */*~
rm -f fsdev/*.pod
rm -rf .libs */.libs
......
......@@ -205,6 +205,9 @@ mingw32="no"
gcov="no"
gcov_tool="gcov"
EXESUF=""
DSOSUF=".so"
LDFLAGS_SHARED="-shared"
modules="no"
prefix="/usr/local"
mandir="\${prefix}/share/man"
datadir="\${prefix}/share"
......@@ -515,6 +518,7 @@ OpenBSD)
Darwin)
bsd="yes"
darwin="yes"
LDFLAGS_SHARED="-bundle -undefined dynamic_lookup"
if [ "$cpu" = "x86_64" ] ; then
QEMU_CFLAGS="-arch x86_64 $QEMU_CFLAGS"
LDFLAGS="-arch x86_64 $LDFLAGS"
......@@ -608,6 +612,7 @@ fi
if test "$mingw32" = "yes" ; then
EXESUF=".exe"
DSOSUF=".dll"
QEMU_CFLAGS="-DWIN32_LEAN_AND_MEAN -DWINVER=0x501 $QEMU_CFLAGS"
# enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later)
QEMU_CFLAGS="-D__USE_MINGW_ANSI_STDIO=1 $QEMU_CFLAGS"
......@@ -674,6 +679,9 @@ for opt do
;;
--disable-debug-info)
;;
--enable-modules)
modules="yes"
;;
--cpu=*)
;;
--target-list=*) target_list="$optarg"
......@@ -1130,6 +1138,7 @@ Advanced options (experts only):
--sysconfdir=PATH install config in PATH$confsuffix
--localstatedir=PATH install local state in PATH (set at runtime on win32)
--with-confsuffix=SUFFIX suffix for QEMU data inside datadir and sysconfdir [$confsuffix]
--enable-modules enable modules support
--enable-debug-tcg enable TCG debugging
--disable-debug-tcg disable TCG debugging (default)
--enable-debug-info enable debugging information (default)
......@@ -3768,6 +3777,7 @@ echo "python $python"
if test "$slirp" = "yes" ; then
echo "smbd $smbd"
fi
echo "module support $modules"
echo "host CPU $cpu"
echo "host big endian $bigendian"
echo "target list $target_list"
......@@ -4012,6 +4022,9 @@ echo "TARGET_DIRS=$target_list" >> $config_host_mak
if [ "$docs" = "yes" ] ; then
echo "BUILD_DOCS=yes" >> $config_host_mak
fi
if test "$modules" = "yes"; then
echo "CONFIG_MODULES=y" >> $config_host_mak
fi
if test "$sdl" = "yes" ; then
echo "CONFIG_SDL=y" >> $config_host_mak
echo "SDL_CFLAGS=$sdl_cflags" >> $config_host_mak
......@@ -4396,6 +4409,8 @@ echo "LIBTOOLFLAGS=$LIBTOOLFLAGS" >> $config_host_mak
echo "LIBS+=$LIBS" >> $config_host_mak
echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
echo "EXESUF=$EXESUF" >> $config_host_mak
echo "DSOSUF=$DSOSUF" >> $config_host_mak
echo "LDFLAGS_SHARED=$LDFLAGS_SHARED" >> $config_host_mak
echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
echo "POD2MAN=$POD2MAN" >> $config_host_mak
echo "TRANSLATE_OPT_CFLAGS=$TRANSLATE_OPT_CFLAGS" >> $config_host_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
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