diff -up sage-5.10/spkg/build/sage-5.10/sage/interfaces/gp.py.orig sage-5.10/spkg/build/sage-5.10/sage/interfaces/gp.py
--- sage-5.10/spkg/build/sage-5.10/sage/interfaces/gp.py.orig	2013-07-29 19:56:27.093058008 -0300
+++ sage-5.10/spkg/build/sage-5.10/sage/interfaces/gp.py	2013-07-29 19:56:38.015058427 -0300
@@ -977,11 +977,11 @@ def is_GpElement(x):
     """
     return isinstance(x, GpElement)
 
-from sage.env import DOT_SAGE, SAGE_LOCAL
+from sage.env import DOT_SAGE, SAGE_EXTCODE
 import os
 
-# Set GPRC environment variable to $SAGE_LOCAL/etc/gprc.expect
-os.environ["GPRC"] = os.path.join(SAGE_LOCAL, 'etc', 'gprc.expect')
+# Set GPRC environment variable to $SAGE_EXTCODE/pari/gprc.expect
+os.environ["GPRC"] = '%s/pari/gprc.expect'%SAGE_EXTCODE
 
 # An instance
 gp = Gp(logfile=os.path.join(DOT_SAGE,'gp-expect.log')) # useful for debugging!
diff -up sage-5.10/spkg/build/sage-5.10/sage/libs/pari/gen.pyx.orig sage-5.10/spkg/build/sage-5.10/sage/libs/pari/gen.pyx
--- sage-5.10/spkg/build/sage-5.10/sage/libs/pari/gen.pyx.orig	2013-07-29 19:56:11.479057411 -0300
+++ sage-5.10/spkg/build/sage-5.10/sage/libs/pari/gen.pyx	2013-07-29 19:56:38.025058427 -0300
@@ -183,6 +183,10 @@ include 'sage/ext/python.pxi'
 cdef extern from "mpz_pylong.h":
     cdef int mpz_set_pylong(mpz_t dst, src) except -1
 
+cdef extern from "gmp.h":
+    cdef void mp_get_memory_functions(void**, void**, void**)
+    cdef void mp_set_memory_functions(void*, void*, void*)
+
 # Make sure we don't use mpz_t_offset before initializing it by
 # putting in a value that's likely to provoke a segmentation fault,
 # rather than silently corrupting memory.
@@ -9240,7 +9244,12 @@ cdef class PariInstance(sage.structure.p
 
         # The size here doesn't really matter, because we will allocate
         # our own stack anyway. We ask PARI not to set up signal handlers.
+        cdef void *_gmp_malloc
+        cdef void *_gmp_realloc
+        cdef void *_gmp_free
+        mp_get_memory_functions(&_gmp_malloc, &_gmp_realloc, &_gmp_free)
         pari_init_opts(10000, maxprime, INIT_JMPm | INIT_DFTm)
+        mp_set_memory_functions(_gmp_malloc, _gmp_realloc, _gmp_free)
         num_primes = maxprime
 
         # NOTE: sig_on() can only come AFTER pari_init_opts()!