guest agent: remove uneeded dependencies

This patch tries to cull any uneeded library dependencies from the guest
agent to improve portability across various distros. We do so by being
as explicit as possible about in-tree dependencies rather than relying
on existing *-obj-y targets, and by manually setting LIBS for the
qemu-ga target to avoid pulling in LIBS_TOOLS libraries discovered by
configure.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

3 files changed, 16 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index eb3e338206..86068498e9 100644
--- a/Makefile
+++ b/Makefile
@@ -166,6 +166,7 @@ test-coroutine: test-coroutine.o qemu-timer-common.o async.o $(coroutine-obj-y)
 $(qapi-obj-y): $(GENERATED_HEADERS)
 qapi-dir := qapi-generated
 test-visitor.o test-qmp-commands.o qemu-ga$(EXESUF): QEMU_CFLAGS += -I $(qapi-dir)
+qemu-ga$(EXESUF): LIBS = $(LIBS_QGA)
 
 $(qapi-dir)/test-qapi-types.c: $(qapi-dir)/test-qapi-types.h
 $(qapi-dir)/test-qapi-types.h: $(SRC_PATH)/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-types.py
@@ -192,12 +193,11 @@ test-visitor: test-visitor.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o $
 test-qmp-commands.o: $(addprefix $(qapi-dir)/, test-qapi-types.c test-qapi-types.h test-qapi-visit.c test-qapi-visit.h test-qmp-marshal.c test-qmp-commands.h) $(qapi-obj-y)
 test-qmp-commands: test-qmp-commands.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o $(qapi-obj-y) error.o osdep.o $(oslib-obj-y) qjson.o json-streamer.o json-lexer.o json-parser.o qerror.o qemu-error.o qemu-tool.o $(qapi-dir)/test-qapi-visit.o $(qapi-dir)/test-qapi-types.o $(qapi-dir)/test-qmp-marshal.o module.o
 
-QGALIB=qga/guest-agent-command-state.o qga/guest-agent-commands.o
 QGALIB_GEN=$(addprefix $(qapi-dir)/, qga-qapi-types.c qga-qapi-types.h qga-qapi-visit.c qga-qmp-marshal.c)
-
 $(QGALIB_GEN): $(GENERATED_HEADERS)
-$(QGALIB) qemu-ga.o: $(QGALIB_GEN) $(qapi-obj-y)
-qemu-ga$(EXESUF): qemu-ga.o $(QGALIB) qemu-tool.o qemu-error.o error.o $(oslib-obj-y) $(trace-obj-y) $(block-obj-y) $(qobject-obj-y) $(version-obj-y) $(qapi-obj-y) qemu-timer-common.o qemu-sockets.o module.o qapi/qmp-dispatch.o qapi/qmp-registry.o $(qapi-dir)/qga-qapi-visit.o $(qapi-dir)/qga-qapi-types.o $(qapi-dir)/qga-qmp-marshal.o
+$(qga-obj-y) qemu-ga.o: $(QGALIB_GEN)
+
+qemu-ga$(EXESUF): qemu-ga.o $(qga-obj-y) $(qapi-obj-y) $(trace-obj-y) $(qobject-obj-y) $(version-obj-y) $(addprefix $(qapi-dir)/, qga-qapi-visit.o qga-qapi-types.o qga-qmp-marshal.o)
 
 QEMULIBS=libhw32 libhw64 libuser libdis libdis-user
 
diff --git a/Makefile.objs b/Makefile.objs
index 91b71b697d..abd867a0cb 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -396,6 +396,15 @@ qapi-nested-y = qapi-visit-core.o qmp-input-visitor.o qmp-output-visitor.o qapi-
 qapi-nested-y += qmp-registry.o qmp-dispatch.o
 qapi-obj-y = $(addprefix qapi/, $(qapi-nested-y))
 
+######################################################################
+# guest agent
+
+qga-nested-y = guest-agent-commands.o guest-agent-command-state.o
+qga-obj-y = $(addprefix qga/, $(qga-nested-y))
+qga-obj-y += qemu-ga.o qemu-tool.o qemu-error.o qemu-sockets.o module.o qemu-option.o cutils.o osdep.o
+qga-obj-$(CONFIG_WIN32) += oslib-win32.o
+qga-obj-$(CONFIG_POSIX) += oslib-posix.o
+
 vl.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
 
 vl.o: QEMU_CFLAGS+=$(SDL_CFLAGS)
diff --git a/configure b/configure
index 851387556c..234a4c5036 100755
--- a/configure
+++ b/configure
@@ -92,6 +92,7 @@ libs_tools=""
 audio_pt_int=""
 audio_win_int=""
 cc_i386=i386-pc-linux-gnu-gcc
+libs_qga=""
 
 target_list=""
 
@@ -1849,6 +1850,7 @@ if $pkg_config --modversion gthread-2.0 > /dev/null 2>&1 ; then
     glib_cflags=`$pkg_config --cflags gthread-2.0 2>/dev/null`
     glib_libs=`$pkg_config --libs gthread-2.0 2>/dev/null`
     LIBS="$glib_libs $LIBS"
+    libs_qga="$glib_libs $libs_qga"
 else
     echo "glib-2.0 required to compile QEMU"
     exit 1
@@ -3107,6 +3109,7 @@ echo "ARLIBS_END=$arlibs_end" >> $config_host_mak
 echo "LIBS+=$LIBS" >> $config_host_mak
 echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
 echo "EXESUF=$EXESUF" >> $config_host_mak
+echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
 
 # generate list of library paths for linker script