One dataset, two different x-axes?

_Kacey_A · April 26, 2008, 7:25pm

Hello all,

Thanks again for all the help so far – you guys are great! But presently I have a (potentially silly) question. So I’m attempting to create a plot of essentially two lists of data, but would like two x-axes: one along the top in one length scale, another along the bottom in another length scale. I’ve tried manually setting another x-axis at coordinates matching the top side of the plot box, but that didn’t work out so well:

loglog(wavelength, flux, "ko")
axis([1, 100, 10000, 1000000])
a = axes([0.15, 0.95, 0.85, 0.01], frameon=False)
a.yaxis.set_visible(False)
a.set_xticklabels(["test1", "test2", "test3"])

(essentially I made another plot set into the larger one and moved it around until the bottom/x-axis of that plot was along the top of the larger plot… ugly tickmarks above the tickmark labels, though)

Then I tried the twinx() solution:

ax1 = subplot(111)
loglog(wavelength, flux, "ko")

ax2 = twinx()
ax2.xaxis.tick_top()
ax2.set_xticklabels(["test1", "test2", "test3"])
show()

Problem is, I change the labels of the second x-axis, it changes the labels of the bottom one, too… I’m essentially trying to have two scales which are functions of each other, one along the top and the other along the bottom, but for the same dataset. I’ve tried scouring all sorts of documentation and forums but haven’t found quite what I’m looking for. Any help would be much appreciated!

_Arthur_M_Greene · April 27, 2008, 2:53pm

Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
2 import matplotlib.pylab
3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

···

-------------------------------
amg -at- iri -dot- columbia -dot- edu

_Cohen-Tanugi_Johann · April 27, 2008, 3:15pm

hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:

···

Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

-------------------------------------------------------------------------
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_Cohen-Tanugi_Johann · April 27, 2008, 4:40pm

Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py

···

---------------------------------------------------------------------------
ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
      2 import matplotlib
      3 matplotlib.use('PS')
----> 4 from pylab import *
      5
      6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
      2
      3 from matplotlib.pylab import *
      4 import matplotlib.pylab
      5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
    201 from numpy import ma
    202
--> 203 from matplotlib import mpl # pulls in most modules
    204
    205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
      1
----> 2 from matplotlib import artist
      3 from matplotlib import axis
      4 from matplotlib import axes
      5 from matplotlib import cbook
      6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
     12 from ticker import NullLocator, FixedLocator, AutoLocator
     13
---> 14 from font_manager import FontProperties
     15 from text import Text, TextWithDash
     16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
     38 import matplotlib
     39 from matplotlib import afm
---> 40 from matplotlib import ft2font
     41 from matplotlib import rcParams, get_configdir
     42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
            matplotlib: 0.98pre
                python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
                        4.1.2 20070925 (Red Hat 4.1.2-33)]
              platform: linux2

REQUIRED DEPENDENCIES
numpy: 1.1.0.dev5077
freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.22
               Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
              wxPython: 2.8.4.0
                        * WxAgg extension not required for wxPython >= 2.8
                  Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
                        pygobject: 2.14.0
                    Qt: Qt: 3.3.8, PyQt: 3.17.4
                   Qt4: Qt: 4.3.3, PyQt4: 4.3.3
                 Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
                dvipng: 1.5
           ghostscript: 8.61
                 latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
configobj: matplotlib will provide
enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:

hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:


Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
_______________________________________________
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_Arthur_M_Greene · April 27, 2008, 5:05pm

The replies have been helpful, but I'm still trying to figure out where the problem lies, but I have noticed that matplotlib-0.90.1 apparently doesn't use ttconv. I have this version installed at home and am able to generate poscript without a problem. Are you able to tell which package is complaining about the undefined symbol(s)?

If I downgrade (at work) I will probably lose some capabilities, since the file size of 0.91.2 is more than twice that of 0.90.1 (!) But I would prefer to be able to generate .ps or .eps, even if I lose the capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

···

-------------------------------
amg -at- iri -dot- columbia -dot- edu

Johann Cohen-Tanugi wrote:

Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
      2 import matplotlib
      3 matplotlib.use('PS')
----> 4 from pylab import *
      5
      6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
      2
      3 from matplotlib.pylab import *
      4 import matplotlib.pylab
      5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
    201 from numpy import ma
    202
--> 203 from matplotlib import mpl # pulls in most modules
    204
    205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
      1
----> 2 from matplotlib import artist
      3 from matplotlib import axis
      4 from matplotlib import axes
      5 from matplotlib import cbook
      6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
     12 from ticker import NullLocator, FixedLocator, AutoLocator
     13
---> 14 from font_manager import FontProperties
     15 from text import Text, TextWithDash
     16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
     38 import matplotlib
     39 from matplotlib import afm
---> 40 from matplotlib import ft2font
     41 from matplotlib import rcParams, get_configdir
     42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
            matplotlib: 0.98pre
                python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
                        4.1.2 20070925 (Red Hat 4.1.2-33)]
              platform: linux2

REQUIRED DEPENDENCIES
                 numpy: 1.1.0.dev5077
             freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.22
               Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
              wxPython: 2.8.4.0
                        * WxAgg extension not required for wxPython >= 2.8
                  Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
                        pygobject: 2.14.0
                    Qt: Qt: 3.3.8, PyQt: 3.17.4
                   Qt4: Qt: 4.3.3, PyQt4: 4.3.3
                 Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
                dvipng: 1.5
           ghostscript: 8.61
                 latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
             configobj: matplotlib will provide
      enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:

hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:


Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

_Cohen-Tanugi_Johann · April 28, 2008, 12:22pm

After browsing the web a little, it seems that the matplotlib build of ft2font2 is missing the linking of libz.so : if I add it to the command line
[cohen@...1986... matplotlib]$ g++ -pthread -shared build/temp.linux-i686-2.5/src/ft2font.o build/temp.linux-i686-2.5/src/mplutils.o build/temp.linux-i686-2.5/CXX/cxxsupport.o build/temp.linux-i686-2.5/CXX/cxx_extensions.o build/temp.linux-i686-2.5/CXX/IndirectPythonInterface.o build/temp.linux-i686-2.5/CXX/cxxextensions.o -L/usr/local/lib -L/usr/lib -lstdc++ -lm -lpython2.5 -L/usr/lib -lfreetype _lz -o build/lib.linux-i686-2.5/matplotlib/ft2font.so

and then reinstall matplotlib, the problem goes away, id est I can import pylab, and the pstest example works. One word on this last statement though : as is the pstest example does not open any window to show the plots, id est the final show() command does not do anything. But if I savefig('pstest'), I can open the pstest.ps resulting file with gv and can see the plots. I do not know whether this behavior is expected....

So, should I fill a ticket for the inclusion of libz.so at link time of ft2font.so?

thanks,
Johann

Arthur M. Greene wrote:

···

The replies have been helpful, but I'm still trying to figure out where the problem lies, but I have noticed that matplotlib-0.90.1 apparently doesn't use ttconv. I have this version installed at home and am able to generate poscript without a problem. Are you able to tell which package is complaining about the undefined symbol(s)?

If I downgrade (at work) I will probably lose some capabilities, since the file size of 0.91.2 is more than twice that of 0.90.1 (!) But I would prefer to be able to generate .ps or .eps, even if I lose the capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

Johann Cohen-Tanugi wrote:


Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
      2 import matplotlib
      3 matplotlib.use('PS')
----> 4 from pylab import *
      5
      6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
      2
      3 from matplotlib.pylab import *
      4 import matplotlib.pylab
      5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
    201 from numpy import ma
    202
--> 203 from matplotlib import mpl # pulls in most modules
    204
    205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
      1
----> 2 from matplotlib import artist
      3 from matplotlib import axis
      4 from matplotlib import axes
      5 from matplotlib import cbook
      6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
     12 from ticker import NullLocator, FixedLocator, AutoLocator
     13
---> 14 from font_manager import FontProperties
     15 from text import Text, TextWithDash
     16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
     38 import matplotlib
     39 from matplotlib import afm
---> 40 from matplotlib import ft2font
     41 from matplotlib import rcParams, get_configdir
     42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
            matplotlib: 0.98pre
                python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
                        4.1.2 20070925 (Red Hat 4.1.2-33)]
              platform: linux2

REQUIRED DEPENDENCIES
                 numpy: 1.1.0.dev5077
             freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.22
               Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
              wxPython: 2.8.4.0
                        * WxAgg extension not required for wxPython >= 2.8
                  Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
                        pygobject: 2.14.0
                    Qt: Qt: 3.3.8, PyQt: 3.17.4
                   Qt4: Qt: 4.3.3, PyQt4: 4.3.3
                 Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
                dvipng: 1.5
           ghostscript: 8.61
                 latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
             configobj: matplotlib will provide
      enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:


hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:


Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

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Michael_Droettboom1 · April 28, 2008, 1:59pm

Johann Cohen-Tanugi wrote:

After browsing the web a little, it seems that the matplotlib build of ft2font2 is missing the linking of libz.so : if I add it to the command line
[cohen@...1986... matplotlib]$ g++ -pthread -shared build/temp.linux-i686-2.5/src/ft2font.o build/temp.linux-i686-2.5/src/mplutils.o build/temp.linux-i686-2.5/CXX/cxxsupport.o build/temp.linux-i686-2.5/CXX/cxx_extensions.o build/temp.linux-i686-2.5/CXX/IndirectPythonInterface.o build/temp.linux-i686-2.5/CXX/cxxextensions.o -L/usr/local/lib -L/usr/lib -lstdc++ -lm -lpython2.5 -L/usr/lib -lfreetype _lz -o build/lib.linux-i686-2.5/matplotlib/ft2font.so

and then reinstall matplotlib, the problem goes away, id est I can import pylab, and the pstest example works. One word on this last statement though : as is the pstest example does not open any window to show the plots, id est the final show() command does not do anything. But if I savefig('pstest'), I can open the pstest.ps resulting file with gv and can see the plots. I do not know whether this behavior is expected....

So, should I fill a ticket for the inclusion of libz.so at link time of ft2font.so?

matplotlib is should already be attempting to dynamically link libz when it generates ft2font.so. I wonder why it wasn't for you. Can you revert any manual changes, remove the build directory ("build" at the top of the source tree), rebuild ("python setup.py build") and attach the output to this list?

Cheers,
Mike

···

thanks,
Johann

Arthur M. Greene wrote:


The replies have been helpful, but I'm still trying to figure out where the problem lies, but I have noticed that matplotlib-0.90.1 apparently doesn't use ttconv. I have this version installed at home and am able to generate poscript without a problem. Are you able to tell which package is complaining about the undefined symbol(s)?

If I downgrade (at work) I will probably lose some capabilities, since the file size of 0.91.2 is more than twice that of 0.90.1 (!) But I would prefer to be able to generate .ps or .eps, even if I lose the capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

Johann Cohen-Tanugi wrote:


Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
      2 import matplotlib
      3 matplotlib.use('PS')
----> 4 from pylab import *
      5
      6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
      2
      3 from matplotlib.pylab import *
      4 import matplotlib.pylab
      5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
    201 from numpy import ma
    202
--> 203 from matplotlib import mpl # pulls in most modules
    204
    205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
      1
----> 2 from matplotlib import artist
      3 from matplotlib import axis
      4 from matplotlib import axes
      5 from matplotlib import cbook
      6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
     12 from ticker import NullLocator, FixedLocator, AutoLocator
     13
---> 14 from font_manager import FontProperties
     15 from text import Text, TextWithDash
     16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
     38 import matplotlib
     39 from matplotlib import afm
---> 40 from matplotlib import ft2font
     41 from matplotlib import rcParams, get_configdir
     42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
            matplotlib: 0.98pre
                python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
                        4.1.2 20070925 (Red Hat 4.1.2-33)]
              platform: linux2

REQUIRED DEPENDENCIES
                 numpy: 1.1.0.dev5077
             freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.22
               Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
              wxPython: 2.8.4.0
                        * WxAgg extension not required for wxPython >= 2.8
                  Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
                        pygobject: 2.14.0
                    Qt: Qt: 3.3.8, PyQt: 3.17.4
                   Qt4: Qt: 4.3.3, PyQt4: 4.3.3
                 Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
                dvipng: 1.5
           ghostscript: 8.61
                 latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
             configobj: matplotlib will provide
      enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:


hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:


Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Michael_Droettboom1 · April 28, 2008, 2:03pm

Arthur M. Greene wrote:

The replies have been helpful, but I'm still trying to figure out where the problem lies, but I have noticed that matplotlib-0.90.1 apparently doesn't use ttconv.

That is correct. ttconv is a tool to convert and subset Truetype fonts to Postscript fonts for embedding in Postscript files.

I have this version installed at home and am able to generate poscript without a problem. Are you able to tell which package is complaining about the undefined symbol(s)?

The undefined symbols you get are from the C++ standard library. These sorts of messages are very common when you compile something on one version of gcc (libg++) and then run on a machine with another version of libg++. Did you obtain binaries for matplotlib 0.91.2 somewhere, or did you compile from source?

If I downgrade (at work) I will probably lose some capabilities, since the file size of 0.91.2 is more than twice that of 0.90.1 (!)

I suspect most of the file size difference is due to the inclusion of the STIX math fonts. There weren't huge amounts of code added between 0.90 and 0.91.

Cheers,
Mike

···

But I would prefer to be able to generate .ps or .eps, even if I lose the capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

Johann Cohen-Tanugi wrote:


Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
      2 import matplotlib
      3 matplotlib.use('PS')
----> 4 from pylab import *
      5
      6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
      2
      3 from matplotlib.pylab import *
      4 import matplotlib.pylab
      5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
    201 from numpy import ma
    202
--> 203 from matplotlib import mpl # pulls in most modules
    204
    205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
      1
----> 2 from matplotlib import artist
      3 from matplotlib import axis
      4 from matplotlib import axes
      5 from matplotlib import cbook
      6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
     12 from ticker import NullLocator, FixedLocator, AutoLocator
     13
---> 14 from font_manager import FontProperties
     15 from text import Text, TextWithDash
     16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
     38 import matplotlib
     39 from matplotlib import afm
---> 40 from matplotlib import ft2font
     41 from matplotlib import rcParams, get_configdir
     42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
            matplotlib: 0.98pre
                python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
                        4.1.2 20070925 (Red Hat 4.1.2-33)]
              platform: linux2

REQUIRED DEPENDENCIES
                 numpy: 1.1.0.dev5077
             freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
                libpng: 1.2.22
               Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
              wxPython: 2.8.4.0
                        * WxAgg extension not required for wxPython >= 2.8
                  Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
                        pygobject: 2.14.0
                    Qt: Qt: 3.3.8, PyQt: 3.17.4
                   Qt4: Qt: 4.3.3, PyQt4: 4.3.3
                 Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
              datetime: present, version unknown
              dateutil: matplotlib will provide
                  pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
                dvipng: 1.5
           ghostscript: 8.61
                 latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
             configobj: matplotlib will provide
      enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:


hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
        linux-gate.so.1 => (0x00110000)
        libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
        libm.so.6 => /lib/libm.so.6 (0x0011f000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
        libc.so.6 => /lib/libc.so.6 (0x003f3000)
        libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
        libutil.so.1 => /lib/libutil.so.1 (0x00172000)
        /lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
         U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:


Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
       2 import matplotlib.pylab
       3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
     290
     291
--> 292 from matplotlib.pyplot import *
     293
     294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
      35
      36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
      38
      39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
      22 backend_name = 'backend_'+backend.lower()
      23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
      25
      26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

      22 from matplotlib.font_manager import findfont, is_opentype_cff_font
      23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
      25 from matplotlib.mathtext import MathTextParser
      26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

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--
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Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

_Cohen-Tanugi_Johann · April 28, 2008, 8:55pm

Hi Michael,

ok, here it is attached. For completion, from the matplotlib directory, I issued :
[cohen@...1986... matplotlib]$ \rm -rf build
[cohen@...1986... matplotlib]$ python setup.py build > build.log
The following was printed out to the screen and not redirected :
src/backend_agg.cpp: In member function �Py::Object RendererAgg::write_rgba(const Py::Tuple&)�:
src/backend_agg.cpp:1303: warning: ignoring return value of �size_t fwrite(const void*, size_t, size_t, FILE*)�, declared with attribute warn_unused_result
src/backend_agg.cpp:1308: warning: ignoring return value of �size_t fwrite(const void*, size_t, size_t, FILE*)�, declared with attribute warn_unused_result
lib/enthought/traits/ctraits.c: In function �_trait_cast�:
lib/enthought/traits/ctraits.c:2370: warning: format �%lu� expects type �long unsigned int�, but argument 3 has type �Py_ssize_t�

I have revision 5087 of matplotlib. In the log you can see that libz is linked against for the backends, but not for ft2font......
Best,
Johann

Michael Droettboom wrote:

build.log (105 KB)

···

Johann Cohen-Tanugi wrote:

After browsing the web a little, it seems that the matplotlib build of ft2font2 is missing the linking of libz.so : if I add it to the command line
[cohen@...1986... matplotlib]$ g++ -pthread -shared build/temp.linux-i686-2.5/src/ft2font.o build/temp.linux-i686-2.5/src/mplutils.o build/temp.linux-i686-2.5/CXX/cxxsupport.o build/temp.linux-i686-2.5/CXX/cxx_extensions.o build/temp.linux-i686-2.5/CXX/IndirectPythonInterface.o build/temp.linux-i686-2.5/CXX/cxxextensions.o -L/usr/local/lib -L/usr/lib -lstdc++ -lm -lpython2.5 -L/usr/lib -lfreetype _lz -o build/lib.linux-i686-2.5/matplotlib/ft2font.so

and then reinstall matplotlib, the problem goes away, id est I can import pylab, and the pstest example works. One word on this last statement though : as is the pstest example does not open any window to show the plots, id est the final show() command does not do anything. But if I savefig('pstest'), I can open the pstest.ps resulting file with gv and can see the plots. I do not know whether this behavior is expected....

So, should I fill a ticket for the inclusion of libz.so at link time of ft2font.so?

matplotlib is should already be attempting to dynamically link libz when it generates ft2font.so. I wonder why it wasn't for you. Can you revert any manual changes, remove the build directory ("build" at the top of the source tree), rebuild ("python setup.py build") and attach the output to this list?

Cheers,
Mike

thanks,
Johann

Arthur M. Greene wrote:

The replies have been helpful, but I'm still trying to figure out where the problem lies, but I have noticed that matplotlib-0.90.1 apparently doesn't use ttconv. I have this version installed at home and am able to generate poscript without a problem. Are you able to tell which package is complaining about the undefined symbol(s)?

If I downgrade (at work) I will probably lose some capabilities, since the file size of 0.91.2 is more than twice that of 0.90.1 (!) But I would prefer to be able to generate .ps or .eps, even if I lose the capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu

Johann Cohen-Tanugi wrote:

Sorry for the preceding mis-threaded version. Here it is again :

I dont know if it is related, but I am actually failing an exemple :
[cohen@...1986... matplotlib]$ ipython examples/pstest.py
---------------------------------------------------------------------------

ImportError Traceback (most recent call last)

/home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py in <module>()
2 import matplotlib
3 matplotlib.use('PS')
----> 4 from pylab import *
5
6 def f(t):

/usr/lib/python2.5/site-packages/pylab.py in <module>()
----> 1
2
3 from matplotlib.pylab import *
4 import matplotlib.pylab
5 __doc__ = matplotlib.pylab.__doc__

/usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
201 from numpy import ma
202
--> 203 from matplotlib import mpl # pulls in most modules
204
205 # catch more than an import error here, since the src could fail too,

/usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
1
----> 2 from matplotlib import artist
3 from matplotlib import axis
4 from matplotlib import axes
5 from matplotlib import cbook
6 from matplotlib import collections

/usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
12 from ticker import NullLocator, FixedLocator, AutoLocator
13
---> 14 from font_manager import FontProperties
15 from text import Text, TextWithDash
16 from transforms import Affine2D, Bbox, blended_transform_factory, \

/usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
38 import matplotlib
39 from matplotlib import afm
---> 40 from matplotlib import ft2font
41 from matplotlib import rcParams, get_configdir
42 from matplotlib.cbook import is_string_like

ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: undefined symbol: inflateReset

My config is :

BUILDING MATPLOTLIB
matplotlib: 0.98pre
python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11) [GCC
4.1.2 20070925 (Red Hat 4.1.2-33)]
platform: linux2

REQUIRED DEPENDENCIES
numpy: 1.1.0.dev5077
freetype2: 9.16.3

OPTIONAL BACKEND DEPENDENCIES
libpng: 1.2.22
Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
wxPython: 2.8.4.0
* WxAgg extension not required for wxPython >= 2.8
Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
pygobject: 2.14.0
Qt: Qt: 3.3.8, PyQt: 3.17.4
Qt4: Qt: 4.3.3, PyQt4: 4.3.3
Cairo: 1.4.12

OPTIONAL DATE/TIMEZONE DEPENDENCIES
datetime: present, version unknown
dateutil: matplotlib will provide
pytz: matplotlib will provide

OPTIONAL USETEX DEPENDENCIES
dvipng: 1.5
ghostscript: 8.61
latex: 3.141592

EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
configobj: matplotlib will provide
enthought.traits: matplotlib will provide

best,
Johann

Johann Cohen-Tanugi wrote:

hmm, I did not use matplotlib recently, but looking at the library, I would guess that I have the same issue :
[cohen@...1986... ~]$ ldd /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
linux-gate.so.1 => (0x00110000)
libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
libm.so.6 => /lib/libm.so.6 (0x0011f000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
libc.so.6 => /lib/libc.so.6 (0x003f3000)
libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
libutil.so.1 => /lib/libutil.so.1 (0x00172000)
/lib/ld-linux.so.2 (0x001a4000)
[cohen@...1986... ~]$ nm /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
U _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4

Arthur M. Greene wrote:

Hello Matplotlib users,

I'm having difficulty generating postscript, and receiving an error that I'm guessing reflects a version conflict, but I'm not sure exactly which version of what needs to be changed. If I generate a plot (backend is QtAGG, so I get a window), then click on the save button, I get a dialog saying:

/path_to/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

Alternatively, if I do

import matplotlib; matplotlib.use('PS'); from pylab import *

the result is as follows (essentially the same error):

exceptions.ImportError
Traceback (most recent call last)

/home/amg/<ipython console>

/home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
----> 1 from matplotlib.pylab import *
2 import matplotlib.pylab
3 __doc__ = matplotlib.pylab.__doc__

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
290
291
--> 292 from matplotlib.pyplot import *
293
294

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
35
36 from matplotlib.backends import pylab_setup
---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
38
39 def switch_backend(newbackend):

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py in pylab_setup()
22 backend_name = 'backend_'+backend.lower()
23 backend_mod = __import__('matplotlib.backends.'+backend_name,
---> 24 globals(),locals(),[backend_name])
25
26 # Things we pull in from all backends

/home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py

22 from matplotlib.font_manager import findfont, is_opentype_cff_font
23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT, LOAD_NO_HINTING
---> 24 from matplotlib.ttconv import convert_ttf_to_ps
25 from matplotlib.mathtext import MathTextParser
26 from matplotlib._mathtext_data import uni2type1

ImportError: /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE

(The above backtrace is from iPython, but I get the same thing running from plain ol' Python.)

Googling suggests that this might mean I have a version of Matplotlib that is too recent for the g++ compiler on my system, but I'm not really certain. I'm running as an unprivileged user on RHEL4, with most of the necessary libraries already present on the system. I've only had to add qt and PyQt, which are installed in my home directory, where Matplotlib can apparently find them. Version info is as follows:

These are locally installed:
Python 2.4
qt-3.3.8b
PyQt-3.17.4
Matplotlib-0.91.2

The following were already present:
Kernel: 2.6.9-67.0.1.ELsmp, on i686
glibc-2.3.4-2.39
gcc-3.4.6-9
tcl-8.4.7-2
tk-8.4.7-3.el4_6.1
freetype-2.1.9-6.el4
libpng-1.2.7-3.el4_5.1
zlib-1.2.1.2-1.2
ghostscript-7.07-33.2.el4_6.1
Output of 'gs --version': 8.50

I tried switching to qt4/PyQt4, but then ipython -pylab hangs...

Not sure what other info to supply; suggestions appreciated.

Thanks!

Arthur

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_John_Hunter1 · April 28, 2008, 9:23pm

Do you have pkgconfig installed? In setupext.py, it looks like the
'z' lib is added only if we are not finding pkgconfig:

def add_ft2font_flags(module):
    'Add the module flags to ft2font extension'
    if not get_pkgconfig(module, 'freetype2'):
        module.libraries.extend(['freetype', 'z'])

If get_pkgconfig is returning True, but it is not configured properly
to find libz for freetype2, you may fall into a configure black hole
where libz never gets added.

Does it help to modify this function to read:

def add_ft2font_flags(module):
    'Add the module flags to ft2font extension'
    if not get_pkgconfig(module, 'freetype2'):
        module.libraries.extend(['freetype', 'z'])
        add_base_flags(module)

        basedirs = module.include_dirs[:] # copy the list to avoid inf loop!
        for d in basedirs:
            module.include_dirs.append(os.path.join(d, 'freetype2'))
            p = os.path.join(d, 'lib/freetype2/include')
            if os.path.exists(p): module.include_dirs.append(p)
            p = os.path.join(d, 'lib/freetype2/include/freetype2')
            if os.path.exists(p): module.include_dirs.append(p)

        basedirs = module.library_dirs[:] # copy the list to avoid inf loop!
        for d in basedirs:
            p = os.path.join(d, 'freetype2/lib')
            if os.path.exists(p): module.library_dirs.append(p)
    else:
        add_base_flags(module)
        module.libraries.append('z')

···

On Mon, Apr 28, 2008 at 3:55 PM, Johann Cohen-Tanugi <cohen@...1565...> wrote:

Hi Michael,

ok, here it is attached. For completion, from the matplotlib directory, I
issued :
[cohen@...1986... matplotlib]$ \rm -rf build
[cohen@...1986... matplotlib]$ python setup.py build > build.log
The following was printed out to the screen and not redirected :
src/backend_agg.cpp: In member function 'Py::Object
RendererAgg::write_rgba(const Py::Tuple&)':
src/backend_agg.cpp:1303: warning: ignoring return value of 'size_t
fwrite(const void*, size_t, size_t, FILE*)', declared with attribute
warn_unused_result
src/backend_agg.cpp:1308: warning: ignoring return value of 'size_t
fwrite(const void*, size_t, size_t, FILE*)', declared with attribute
warn_unused_result
lib/enthought/traits/ctraits.c: In function '_trait_cast':
lib/enthought/traits/ctraits.c:2370: warning: format '%lu' expects type
'long unsigned int', but argument 3 has type 'Py_ssize_t'

I have revision 5087 of matplotlib. In the log you can see that libz is
linked against for the backends, but not for ft2font......
Best,

_Cohen-Tanugi_Johann · April 28, 2008, 9:38pm

yes it does! -lz now shows up and the pstest runs fine. Any idea what is failing wrt pkgconfig?
thanks,
Johann

John Hunter wrote:

···

On Mon, Apr 28, 2008 at 3:55 PM, Johann Cohen-Tanugi > <cohen@...1565...> wrote:


Hi Michael,

ok, here it is attached. For completion, from the matplotlib directory, I
issued :
[cohen@...1986... matplotlib]$ \rm -rf build
[cohen@...1986... matplotlib]$ python setup.py build > build.log
The following was printed out to the screen and not redirected :
src/backend_agg.cpp: In member function 'Py::Object
RendererAgg::write_rgba(const Py::Tuple&)':
src/backend_agg.cpp:1303: warning: ignoring return value of 'size_t
fwrite(const void*, size_t, size_t, FILE*)', declared with attribute
warn_unused_result
src/backend_agg.cpp:1308: warning: ignoring return value of 'size_t
fwrite(const void*, size_t, size_t, FILE*)', declared with attribute
warn_unused_result
lib/enthought/traits/ctraits.c: In function '_trait_cast':
lib/enthought/traits/ctraits.c:2370: warning: format '%lu' expects type
'long unsigned int', but argument 3 has type 'Py_ssize_t'

I have revision 5087 of matplotlib. In the log you can see that libz is
linked against for the backends, but not for ft2font......
Best,

Do you have pkgconfig installed? In setupext.py, it looks like the
'z' lib is added only if we are not finding pkgconfig:

def add_ft2font_flags(module):
    'Add the module flags to ft2font extension'
    if not get_pkgconfig(module, 'freetype2'):
        module.libraries.extend(['freetype', 'z'])

If get_pkgconfig is returning True, but it is not configured properly
to find libz for freetype2, you may fall into a configure black hole
where libz never gets added.

Does it help to modify this function to read:

def add_ft2font_flags(module):
    'Add the module flags to ft2font extension'
    if not get_pkgconfig(module, 'freetype2'):
        module.libraries.extend(['freetype', 'z'])
        add_base_flags(module)

        basedirs = module.include_dirs[:] # copy the list to avoid inf loop!
        for d in basedirs:
            module.include_dirs.append(os.path.join(d, 'freetype2'))
            p = os.path.join(d, 'lib/freetype2/include')
            if os.path.exists(p): module.include_dirs.append(p)
            p = os.path.join(d, 'lib/freetype2/include/freetype2')
            if os.path.exists(p): module.include_dirs.append(p)

        basedirs = module.library_dirs[:] # copy the list to avoid inf loop!
        for d in basedirs:
            p = os.path.join(d, 'freetype2/lib')
            if os.path.exists(p): module.library_dirs.append(p)
    else:
        add_base_flags(module)
        module.libraries.append('z')

_Cohen-Tanugi_Johann · April 29, 2008, 7:06am

hi John,
for the record, I have a fedora 8 box, and the shipped version of pkgconfig (pkgconfig-0.22-4.fc8) gives me :

[cohen@...1986... matplotlib]$ /usr/bin/pkg-config --libs freetype2
-lfreetype

No -lz here, if I am not wrong in my querying this tool .....

best,
Johann

_John_Hunter1 · April 29, 2008, 12:26pm

This looks like the correct incantation, so it appears that your
proplem is a misconfigured freetype2.pc. You might want to post
something to the fedora list, or to the free type list, or simply make
a patch against the pc file. I am not sure who maintains that part.

JDH

···

On Tue, Apr 29, 2008 at 2:06 AM, Johann Cohen-Tanugi <cohen@...1565...> wrote:

hi John,
for the record, I have a fedora 8 box, and the shipped version of
pkgconfig (pkgconfig-0.22-4.fc8) gives me :

[cohen@...1986... matplotlib]$ /usr/bin/pkg-config --libs freetype2
-lfreetype

No -lz here, if I am not wrong in my querying this tool .....

_Cohen-Tanugi_Johann · April 30, 2008, 11:29am

hello,
so the freetype.rc is defined with env variables that are supposed to be fed in when packaging it. LIBZ seemingly was missing when the fedora 8 packaging of freetype was done. I added -lz directly to freetype.rc and rebuilt successfully matplotlib. I have no clue which mailing list to ping for a fedora packaging issue....
Anyway, end of story for this part of the thread....

best,
Johann

John Hunter wrote:

···

On Tue, Apr 29, 2008 at 2:06 AM, Johann Cohen-Tanugi > <cohen@...1565...> wrote:

hi John,
for the record, I have a fedora 8 box, and the shipped version of
pkgconfig (pkgconfig-0.22-4.fc8) gives me :

[cohen@...1986... matplotlib]$ /usr/bin/pkg-config --libs freetype2
-lfreetype

No -lz here, if I am not wrong in my querying this tool .....

This looks like the correct incantation, so it appears that your
proplem is a misconfigured freetype2.pc. You might want to post
something to the fedora list, or to the free type list, or simply make
a patch against the pc file. I am not sure who maintains that part.

JDH