Update to sagemath 7.5.1

sagemath-pari.patch

@@ -1,77 +1,24 @@
-diff -up src/sage/libs/pari/handle_error.pxd.orig src/sage/libs/pari/handle_error.pxd
---- src/sage/libs/pari/handle_error.pxd.orig	2016-10-20 08:06:47.720535139 -0400
-+++ src/sage/libs/pari/handle_error.pxd	2016-10-20 08:07:01.459535665 -0400
-@@ -1,5 +1,5 @@
- from .types cimport GEN
+diff -up src/sage/libs/cypari2/paridecl.pxd.orig src/sage/libs/cypari2/paridecl.pxd
+--- src/sage/libs/cypari2/paridecl.pxd.orig	2017-03-04 14:37:56.976639516 -0500
++++ src/sage/libs/cypari2/paridecl.pxd	2017-03-04 14:38:09.953640013 -0500
+@@ -77,7 +77,7 @@ cdef extern from "sage/libs/cypari2/cypa
+     int     PARI_SIGINT_block, PARI_SIGINT_pending
+     void    NEXT_PRIME_VIADIFF(long, byteptr)
+     void    PREC_PRIME_VIADIFF(long, byteptr)
+-    int     INIT_JMPm, INIT_SIGm, INIT_DFTm, INIT_noPRIMEm, INIT_noIMTm
++    int     INIT_JMPm, INIT_SIGm, INIT_DFTm, INIT_noPRIMEm, INIT_noIMTm, INIT_noINTGMPm
+     int     new_galois_format, factor_add_primes, factor_proven
+     int     precdl
+     # The "except 0" here is to ensure compatibility with
+diff -up src/sage/libs/cypari2/pari_instance.pyx.orig src/sage/libs/cypari2/pari_instance.pyx
+--- src/sage/libs/cypari2/pari_instance.pyx.orig	2017-03-04 14:38:30.535640801 -0500
++++ src/sage/libs/cypari2/pari_instance.pyx	2017-03-04 14:38:39.680641151 -0500
+@@ -510,7 +510,7 @@ cdef class PariInstance(PariInstance_aut
+         # As a simple heuristic, we set the virtual stack to 1/4 of the
+         # virtual memory.
  
- cdef void _pari_init_error_handling()
--cdef int _pari_err_handle(GEN E) except 0
-+cdef int _pari_handle_exception(long errnum_unused) except 0
- cdef void _pari_err_recover(long errnum)
-diff -up src/sage/libs/pari/handle_error.pyx.orig src/sage/libs/pari/handle_error.pyx
---- src/sage/libs/pari/handle_error.pyx.orig	2016-10-20 08:07:12.336536082 -0400
-+++ src/sage/libs/pari/handle_error.pyx	2016-10-20 08:08:23.089538791 -0400
-@@ -139,7 +139,7 @@ cdef void _pari_init_error_handling():
-     cb_pari_err_recover = _pari_err_recover
+-        pari_init_opts(size, maxprime, INIT_DFTm)
++        pari_init_opts(size, maxprime, INIT_DFTm|INIT_noINTGMPm)
  
- 
--cdef int _pari_err_handle(GEN E) except 0:
-+cdef int _pari_handle_exception(long errnum_unused) except 0:
-     """
-     Convert a PARI error into a Sage exception, unless the error was
-     a stack overflow, in which case we enlarge the stack.
-@@ -158,11 +158,11 @@ cdef int _pari_err_handle(GEN E) except
-         PariError: impossible inverse in gdiv: 0
- 
-     """
-+    cdef GEN E = pari_err_last()
-     cdef long errnum = E[1]
- 
-     sig_block()
-     cdef char* errstr
--    cdef char* s
-     try:
-         if errnum == e_STACK:
-             # Custom error message for PARI stack overflow
-@@ -173,11 +173,6 @@ cdef int _pari_err_handle(GEN E) except
-             errstr = pari_err2str(E)
-             pari_error_string = errstr.decode('ascii')
-             pari_free(errstr)
--
--        s = closure_func_err()
--        if s is not NULL:
--            pari_error_string = s.decode('ascii') + ": " + pari_error_string
--
-         raise PariError(errnum, pari_error_string, pari_instance.new_gen_noclear(E))
-     finally:
-         sig_unblock()
-diff -up src/sage/libs/pari/pari_instance.pxd.orig src/sage/libs/pari/pari_instance.pxd
---- src/sage/libs/pari/pari_instance.pxd.orig	2016-10-20 08:08:33.152539177 -0400
-+++ src/sage/libs/pari/pari_instance.pxd	2016-10-20 08:08:51.209539868 -0400
-@@ -5,6 +5,10 @@ cimport cython
- 
- from sage.libs.pari.gen cimport gen
- 
-+cdef extern from "gmp.h":
-+    cdef void mp_get_memory_functions(void**, void**, void**)
-+    cdef void mp_set_memory_functions(void*, void*, void*)
-+
- cpdef long prec_bits_to_words(unsigned long prec_in_bits)
- cpdef long prec_words_to_bits(long prec_in_words)
- cpdef long default_bitprec()
-diff -up src/sage/libs/pari/pari_instance.pyx.orig src/sage/libs/pari/pari_instance.pyx
---- src/sage/libs/pari/pari_instance.pyx.orig	2016-10-20 08:09:05.632540421 -0400
-+++ src/sage/libs/pari/pari_instance.pyx	2016-10-20 08:10:25.322543472 -0400
-@@ -475,7 +475,12 @@ cdef class PariInstance(PariInstance_aut
-         from sage.misc.memory_info import MemoryInfo
-         mem = MemoryInfo()
- 
-+        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(size, maxprime, INIT_DFTm)
-+        mp_set_memory_functions(_gmp_malloc, _gmp_realloc, _gmp_free)
-         
-         sizemax = mem.virtual_memory_limit() // 4
+         from sage.misc.getusage import virtual_memory_limit