Update to sagemath 7.4

sagemath-pari.patch

@@ -1,25 +1,17 @@
 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	2015-10-11 17:43:43.037782565 -0300
-+++ src/sage/libs/pari/handle_error.pxd	2015-10-11 17:46:28.004788882 -0300
+--- 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 @@
- include 'sage/libs/pari/decl.pxi'
+ from .types cimport GEN
  
  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	2015-10-11 17:43:43.023782564 -0300
-+++ src/sage/libs/pari/handle_error.pyx	2015-10-11 17:45:11.844785966 -0300
-@@ -131,13 +131,13 @@ cdef void _pari_init_error_handling():
-         sage: pari('warning("test")')
-           ***   user warning: test
-     """
--    global cb_pari_err_handle
-+    global cb_pari_handle_exception
-     global cb_pari_err_recover
--    cb_pari_err_handle = _pari_err_handle
-+    cb_pari_handle_exception = _pari_handle_exception
+--- 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
  
  
@@ -28,34 +20,35 @@ diff -up src/sage/libs/pari/handle_error.pyx.orig src/sage/libs/pari/handle_erro
      """
      Convert a PARI error into a Sage exception, unless the error was
      a stack overflow, in which case we enlarge the stack.
-@@ -156,6 +156,7 @@ cdef int _pari_err_handle(GEN E) except
+@@ -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]
-     if errnum == e_STACK:
-         # PARI is out of memory.  We double the size of the PARI stack
-@@ -165,15 +166,10 @@ cdef int _pari_err_handle(GEN E) except
  
      sig_block()
      cdef char* errstr
 -    cdef char* s
      try:
-         errstr = pari_err2str(E)
-         pari_error_string = errstr.decode('ascii')
- 
+         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:
-         pari_free(errstr)
+         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	2015-10-11 17:43:43.028782564 -0300
-+++ src/sage/libs/pari/pari_instance.pxd	2015-10-11 17:45:37.884786963 -0300
-@@ -7,6 +7,10 @@ cimport cython
+--- 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
  
@@ -64,21 +57,21 @@ diff -up src/sage/libs/pari/pari_instance.pxd.orig src/sage/libs/pari/pari_insta
 +    cdef void mp_set_memory_functions(void*, void*, void*)
 +
  cpdef long prec_bits_to_words(unsigned long prec_in_bits)
- 
- cdef class PariInstance_auto(ParentWithBase):
+ 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	2015-10-11 17:43:43.032782565 -0300
-+++ src/sage/libs/pari/pari_instance.pyx	2015-10-11 17:46:14.596788369 -0300
-@@ -429,7 +429,12 @@ cdef class PariInstance(PariInstance_aut
-         # The size here doesn't really matter, because we will allocate
-         # our own stack anyway. We ask PARI not to set up signal and
-         # error handlers.
+--- 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(10000, maxprime, INIT_DFTm)
+         pari_init_opts(size, maxprime, INIT_DFTm)
 +        mp_set_memory_functions(_gmp_malloc, _gmp_realloc, _gmp_free)
+         
+         sizemax = mem.virtual_memory_limit() // 4
  
-         # Disable PARI's stack overflow checking which is incompatible
-         # with multi-threading.