New Port: Mapnik

[dbsgeo@…]

A few other tickets (#12784,#18071) have posted Portfiles for Mapnik.

Here is an updated port for the new 0.6.0 release, in the hopes that the core MacPorts team can help push it over a few last hurdles.

This document (hosted where I developed the portfile) describes a notable problem with boost:

​http://mapnik-utils.googlecode.com/svn/sandbox/ports/README.txt

[dbsgeo@…]

Portfile against svn tag of Mapnik 0.6.0 (for development - ultimately we can build against tarred release)

[raimue (Rainer Müller)]

Tarballs seem to be available already.

[dbsgeo@…]

Updated portfile that fetches from tarred release

[mf2k (Frank Schima)]

Cc Me!

[mf2k (Frank Schima)]

I'm not able to get this to run. It builds fine, but I see the following error in ipython2.5

$ ipython2.5 
Python 2.5.4 (r254:67916, Apr 11 2009, 14:47:01) 
Type "copyright", "credits" or "license" for more information.

IPython 0.9.1 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: import mapnik
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)

/Users/frank/Downloads/mapnik-0.6.0/scons/<ipython console> in <module>()

/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/mapnik/__init__.py in <module>()
     52 setdlopenflags(RTLD_NOW | RTLD_GLOBAL)
     53 
---> 54 from _mapnik import *
     55 from paths import inputpluginspath, fontscollectionpath
     56 

ImportError: dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/mapnik/_mapnik.so, 10): Library not loaded: libmapnik.dylib
  Referenced from: /opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/mapnik/_mapnik.so
  Reason: image not found

[mf2k (Frank Schima)]

I'm attaching my version of the portfile with some fixes such as switching to bzip2 so it downloads.

[dbsgeo@…]

Great, thanks for taking a look at this and for the fixes.

I'm curious about the switch to using:

FRAMEWORK_PYTHON=True

My experience is that will more likely link the python module against the system python, and will create a version mismatch if boost is correctly linked to the macports python (but see #17998).

What does this give on your system?

otool -L /opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/mapnik/_mapnik.so

And

otool -L /opt/local/lib/mapnik/libmapnik.dylib

Regarding the error, this is happening because libmapnik.dylib is likely installed in

/opt/local/lib/mapnik/libmapnik.dylib

but not automatically found without:

export DYLD_LIBRARY_PATH=/opt/local/lib/mapnik/

Does setting that allow the library to be found?

[dbsgeo@…]

Okay, looks like I've got a fix for the library issue. Using export DYLD_LIBRARY_PATH=/opt/local/lib/ is a disaster.

Here is a patch that fixes things by providing the full path to the library location:

See: ​http://qin.laya.com/tech_coding_help/dylib_linking.html

Index: src/SConscript
===================================================================
--- src/SConscript	(revision 1105)
+++ src/SConscript	(working copy)
@@ -31,13 +31,15 @@
 
 install_prefix = env['DESTDIR'] + '/' + prefix
 
+libdir = os.path.normpath(install_prefix + '/' + env['LIBDIR_SCHEMA'])
+
 libraries = env['LIBS']
 
 if env['INTERNAL_LIBAGG']:
     libraries.insert(0, 'agg')
 
 if env['PLATFORM'] == 'Darwin':
-    linkflags = '-Wl,-install_name,libmapnik.dylib'
+    linkflags = '-Wl,-install_name,%s/libmapnik.dylib' % libdir
 elif env['PLATFORM'] == 'SunOS' and env['CXX'].startswith('CC'):
     linkflags = '-R. -h libmapnik.so'
 else: # Linux and others

[dbsgeo@…]

Also, attaching a new portfile which removes the optional LIB_DIR_NAME usage (which does not affect the libmapnik.dylib but will result in problems with fonts due to a bug now fixed in trunk.

[dbsgeo@…]

Okay, I've given up with python25 because the boost python port can link against it.

But the python26 install with boost +python26 works.

So, I'm attaching a new Portfile for python 26 from here:

​http://mapnik-utils.googlecode.com/svn/sandbox/ports/graphics/py26-mapnik/Portfile

with a slightly improved 'src/SConscript' patch as well.

It will need python26 rebuilt after:

​http://trac.macports.org/changeset/50085

[dbsgeo@…]

Python 2.6 Port (abandoning python25 version)

[dbsgeo@…]

install_name patch to allow libmapnik.dylib to be found by python bindings without setting DYLD_LIBRARY_PATH

[dbsgeo@…]

This Portfile is now working great for the first time for me with Portfile.5, the corresponding patch, and these steps:

sudo port install python26 python_select
sudo python_select python26
sudo port install jam 
sudo port install boost +icu +python26
sudo port install py26-mapnik

[dbsgeo@…]

I should mention that one small problem still exists.

The SCons build tool is failing to properly sense build targets so all files are being compiled twice. Adding the argument --debug=explain show that SCons is being dumb here so I need to look into why this as happening as it makes the build take twice as long.

An alternative would be to build and install in one fell swoop but I'm not sure about how to do that in the Portfile syntax yet.

[dbsgeo@…]

Okay, now using configure solves the above problem of double compilation. Portfile again updated, but I'm making small tweaks to the variant options now so until I'm finished the current Portfile can be found at:

​http://mapnik-utils.googlecode.com/svn/sandbox/ports/graphics/py26-mapnik/Portfile

Changes made to solve the above problem were: ​http://code.google.com/p/mapnik-utils/source/detail?r=676#

[(none)]

Milestone Port Submissions deleted

[dbsgeo@…]

Okay, I've found no more major changes needed since my previous comment about fixing the duplicate configure.

As far as I'm concerned this is ready for submission.

I will attach the Portfile again which should be used with the previously attached patch.

[dbsgeo@…]

Mapnik Portfile working with boost 1.38 and python26

[raimue (Rainer Müller)]

Committed in r50498.