Re: [Qemu-devel] [Makefile] Compiling Qemu to dynamic library

["Halsey Pian" <halsey.pian@gmail.com>]

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Hi All,

 

During building this so library, I found that there are many functions with same name in stubs and other source file, for example,

 

There are two implement functions with same name slirp_pollfds_fill in slirp.c and main-loop.c.

 

./stubs/slirp.c:void slirp_pollfds_fill(GArray *pollfds, uint32_t *timeout)

./main-loop.c:    slirp_pollfds_fill(gpollfds, &timeout);

 

Do you know when qemustub should be used? libqemustub.a is only used for qemu-img, qemu-nbd, qemu-io, but not for
qemu-system-x86_64(and other platform binary)? 

 

Thanks!

 

Best Regards

Halsey Pian

 

From: Halsey Pian [mailto:halsey.pian@gmail.com] 
Sent: 2015年1月7日 16:37
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Makefile] Compiling Qemu to dynamic library

 

Dear All,

 

Recently, I would try to compile qemu to a so in order to call qemu internal functions in my program, I’m trying to do this by
steps,

 

1.       Add rules in qemu-2.1.2/ rules.mak

 

%.so:

$(call quiet-command,rm -f $@ && $(LINKPROG) $(QEMU_INCLUDES) $(QEMU_CFLAGS) $(QEMU_DGFLAGS) -fPIC -shared -DBUILD_DSO  $(CFLAGS)
$($@-cflags) $(LDFLAGS) $(LIBS)   -o $@ $^,"  GEN    $(TARGET_DIR)$@")

 

2.       Add target in qemu-2.1.2/Makefile

 

qemu-kvm-obj = vl.o blockdev.o migration.o migration-unix.o qtest.o migration-fd.o ioport.o savevm.o cpus.o

qemu-kvm-obj +=  net/net.o net/queue.o

qemu-kvm-obj += ui/console.o

qemu-kvm-obj += qom/object.o

qemu-kvm-obj += hw/usb/bus.o

qemu-kvm-obj += pixman/pixman/pixman-bits-image.o pixman/pixman/pixman-utils.o

qemu-kvm-obj += qapi/qapi-visit-core.o

 

libqemu.so : $(block-obj-y) $(util-obj-y) qemu-img.o  vmstate.o qemu-file.o $(qemu-kvm-obj) vl.o qapi-event.o migration.o  blockdev.
o migration-unix.o qtest.o migration-fd.o

 

as you know, the main entrance for final binary qemu-system-x86_64 is located in vl.c, I just want it and qemu-img.o to be included
in the so library, so  it seems that there are many dependent objects above should have to be included,  that would be suffering
problem to be fixed below during doing this,

 

There are many platform dependent source code i.e. cpus.c memory.c, how to compile them into so for specific platform? Is there some
guidance for building qemu to so? could you give help on this? 

 

Thanks a lot!

 

Best Regards

Halsey Pian

 


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