[Xen-devel] libxenstat python bindings

[Travis Vachon <Travis.F.Vachon@xxxxxxxxxxxx>]

Hi 

I seem to be having a little trouble with libxenstat, and was wondering
if the xenstat guys might be able to help.

I've pulled the xen-unstable.hg tree and done a somewhat clean install
(ie, post-make uninstall, as well as deleting the relevant libxenstat
libraries).

Next, I entered the tools/xenstat/libxenstat directory and modified the
Makefile so that the shared libraries would be installed. I've included
my Makefile below.

I ran:

make
make install
make python-bindings
make install-python-bindings


Next, I started a python session and entered:

import xenstat 

and got the following output.

> Python 2.3.5 (#2, Sep  4 2005, 22:01:42)
> [GCC 3.3.5 (Debian 1:3.3.5-13)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import xenstat
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/lib/python2.3/site-packages/xenstat.py", line 5, in ?
>     import _xenstat
> ImportError: /usr/local/lib/python2.3/site-packages/_xenstat.so: undefined 
> symbol: xenstat_init
> 

Any thoughts?

Thanks!

Travis 


Makefile:

# libxenstat: statistics-collection library for Xen
# Copyright (C) International Business Machines Corp., 2005
# Author: Josh Triplett <josht@xxxxxxxxxx>
# 
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.

XEN_ROOT=../../..
include $(XEN_ROOT)/tools/Rules.mk
LINUX_ROOT := $(XEN_ROOT)/linux-2.6-xen-sparse

INSTALL         = install
INSTALL_PROG    = $(INSTALL) -m0755 -D
INSTALL_DATA    = $(INSTALL) -m0644 -D

prefix=/usr/local
includedir=$(prefix)/include
libdir=$(prefix)/lib

LDCONFIG=ldconfig
MAKE_LINK=ln -sf

MAJOR=0
MINOR=0

LIB=src/libxenstat.a
SHLIB=src/libxenstat.so.$(MAJOR).$(MINOR)
SHLIB_LINKS=src/libxenstat.so.$(MAJOR) src/libxenstat.so
OBJECTS=src/xenstat.o src/xen-interface.o
SONAME_FLAGS=-Wl,-soname -Wl,libxenstat.so.$(MAJOR)

WARN_FLAGS=-Wall -Werror

CFLAGS+=-Isrc -I$(XEN_LIBXC)
LDFLAGS+=-Lsrc

all:    $(LIB) $(SHLIB)


$(LIB): $(OBJECTS)
        $(AR) rc $@ $^
        $(RANLIB) $@

$(SHLIB): $(OBJECTS)
        $(CC) $(LDFLAGS) $(SONAME_FLAGS) -shared -o $@ $(OBJECTS)

src/xenstat.o: src/xenstat.c src/xenstat.h src/xen-interface.h
        $(CC) $(CFLAGS) $(WARN_FLAGS) -c -o $@ $<

src/xen-interface.o: src/xen-interface.c src/xen-interface.h
        $(CC) $(CFLAGS) $(WARN_FLAGS) -c -o $@ $<

src/libxenstat.so.$(MAJOR): $(LIB)
        $(MAKE_LINK) $(<F) $@

src/libxenstat.so: src/libxenstat.so.$(MAJOR)
        $(MAKE_LINK) $(<F) $@

install: all
        $(INSTALL_DATA) src/xenstat.h $(DESTDIR)$(includedir)/xenstat.h
        $(INSTALL_PROG) $(LIB) $(DESTDIR)$(libdir)/libxenstat.a
        $(INSTALL_PROG) $(SHLIB) \
                        $(DESTDIR)$(libdir)/libxenstat.so.$(MAJOR).$(MINOR)
        $(MAKE_LINK) libxenstat.so.$(MAJOR).$(MINOR) \
                     $(DESTDIR)$(libdir)/libxenstat.so.$(MAJOR)
        $(MAKE_LINK) libxenstat.so.$(MAJOR) \
                     $(DESTDIR)$(libdir)/libxenstat.so
        -$(LDCONFIG)

PYLIB=bindings/swig/python/_xenstat.so
PYMOD=bindings/swig/python/xenstat.py
PYSRC=bindings/swig/python/_xenstat.c
PERLLIB=bindings/swig/perl/xenstat.so
PERLMOD=bindings/swig/perl/xenstat.pm
PERLSRC=bindings/swig/perl/xenstat.c
BINDINGS=$(PYLIB) $(PYMOD) $(PERLLIB) $(PERLMOD)
BINDINGSRC=$(PYSRC) $(PERLSRC)

# The all-bindings target builds all the language bindings
all-bindings: perl-bindings python-bindings

# The install-bindings target installs all the language bindings
install-bindings: install-perl-bindings install-python-bindings

$(BINDINGS): $(SHLIB) $(SHLIB_LINKS) src/xenstat.h

SWIG_FLAGS=-module xenstat -Isrc

# Python bindings
PYTHON_VERSION=2.3
PYTHON_FLAGS=-I/usr/include/python$(PYTHON_VERSION) -lpython$(PYTHON_VERSION)
$(PYSRC) $(PYMOD): bindings/swig/xenstat.i
        swig -python $(SWIG_FLAGS) -outdir $(@D) -o $(PYSRC) $<

$(PYLIB): $(PYSRC)
        $(CC) $(CFLAGS) $(LDFLAGS) $(PYTHON_FLAGS) -shared -lxenstat -o $@ $<

python-bindings: $(PYLIB) $(PYMOD)

pythonlibdir=$(prefix)/lib/python$(PYTHON_VERSION)/site-packages
install-python-bindings: $(PYLIB) $(PYMOD)
        $(INSTALL_PROG) $(PYLIB) $(DESTDIR)$(pythonlibdir)/_xenstat.so
        $(INSTALL_PROG) $(PYMOD) $(DESTDIR)$(pythonlibdir)/xenstat.py

ifeq ($(XENSTAT_PYTHON_BINDINGS),y)
all: python-bindings
install: install-python-bindings
endif

# Perl bindings
PERL_FLAGS=`perl -MConfig -e 'print "$$Config{ccflags} 
-I$$Config{archlib}/CORE";'`
$(PERLSRC) $(PERLMOD): bindings/swig/xenstat.i
        swig -perl $(SWIG_FLAGS) -outdir $(@D) -o $(PERLSRC) $<

$(PERLLIB): $(PERLSRC)
        $(CC) $(CFLAGS) $(LDFLAGS) $(PERL_FLAGS) -shared -lxenstat -o $@ $<

perl-bindings: $(PERLLIB) $(PERLMOD)

perllibdir=$(prefix)/lib/perl5
perlmoddir=$(prefix)/share/perl5
install-perl-bindings: $(PERLLIB) $(PERLMOD)
        $(INSTALL_PROG) $(PERLLIB) $(DESTDIR)$(perllibdir)/xenstat.so
        $(INSTALL_PROG) $(PERLMOD) $(DESTDIR)$(perlmoddir)/xenstat.pm

ifeq ($(XENSTAT_PERL_BINDINGS),y)
all: perl-bindings
install: install-perl-bindings
endif

clean:
        rm -f $(LIB) $(SHLIB) $(SHLIB_LINKS) $(OBJECTS) \
              $(BINDINGS) $(BINDINGSRC)



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