+pyyaml FTBFS on the s390x buildd. It seems this is due to using int
+where the libyaml API uses size_t. I tested the attached patch in
+zelenka.d.o's sid chroot, and at least the python2 build/test worked (it
+failed with the same error as the buildd pre-patching).
+Patch by Julien Cristau <jcristau@debian.org>
+Add to the pyyaml package by Scott Kitterman <scott@kitterman.com>
+http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=676536
+
+Index: pyyaml-3.10/ext/_yaml.pxd
+===================================================================
+--- pyyaml-3.10.orig/ext/_yaml.pxd 2011-05-29 23:31:01.000000000 -0400
++++ pyyaml-3.10/ext/_yaml.pxd 2012-06-08 16:33:54.309407701 -0400
+@@ -86,15 +86,15 @@
+ YAML_MAPPING_END_EVENT
+
+ ctypedef int yaml_read_handler_t(void *data, char *buffer,
+- int size, int *size_read) except 0
++ size_t size, size_t *size_read) except 0
+
+ ctypedef int yaml_write_handler_t(void *data, char *buffer,
+- int size) except 0
++ size_t size) except 0
+
+ ctypedef struct yaml_mark_t:
+- int index
+- int line
+- int column
++ size_t index
++ size_t line
++ size_t column
+ ctypedef struct yaml_version_directive_t:
+ int major
+ int minor
+@@ -113,7 +113,7 @@
+ char *suffix
+ ctypedef struct _yaml_token_scalar_data_t:
+ char *value
+- int length
++ size_t length
+ yaml_scalar_style_t style
+ ctypedef struct _yaml_token_version_directive_data_t:
+ int major
+@@ -152,7 +152,7 @@
+ char *anchor
+ char *tag
+ char *value
+- int length
++ size_t length
+ int plain_implicit
+ int quoted_implicit
+ yaml_scalar_style_t style
+Index: pyyaml-3.10/ext/_yaml.pyx
+===================================================================
+--- pyyaml-3.10.orig/ext/_yaml.pyx 2011-05-29 23:31:01.000000000 -0400
++++ pyyaml-3.10/ext/_yaml.pyx 2012-06-08 16:33:54.313409701 -0400
+@@ -905,7 +905,7 @@
+ raise error
+ return 1
+
+-cdef int input_handler(void *data, char *buffer, int size, int *read) except 0:
++cdef int input_handler(void *data, char *buffer, size_t size, size_t *read) except 0:
+ cdef CParser parser
+ parser = <CParser>data
+ if parser.stream_cache is None:
+@@ -1515,7 +1515,7 @@
+ self.ascend_resolver()
+ return 1
+
+-cdef int output_handler(void *data, char *buffer, int size) except 0:
++cdef int output_handler(void *data, char *buffer, size_t size) except 0:
+ cdef CEmitter emitter
+ emitter = <CEmitter>data
+ if emitter.dump_unicode == 0: