gh-39533: build/pkgs: update eclib to version 20250122
    
Update the version of eclib in sage-the-distro to 20250122 on top of
#38962

**Dependencies**:
* #38962
    
URL: #39533
Reported by: Michael Orlitzky
Reviewer(s): John Cremona

Author: Release Manager

build/pkgs/eclib/SPKG.rst

@@ -30,5 +30,5 @@ Upstream Contact
 -  Author: John Cremona
 -  Email: [email protected]
 -  Website:
-   http://homepages.warwick.ac.uk/staff/J.E.Cremona/mwrank/index.html
+   https://johncremona.github.io/mwrank/index.html
 -  Repository: https://github.com/JohnCremona/eclib

build/pkgs/eclib/checksums.ini

@@ -1,4 +1,4 @@
 tarball=eclib-VERSION.tar.bz2
-sha1=3028ac95e1b76699f5f9e871ac706cda363ab842
-sha256=32d116a3e359b0de4f6486c2bb6188bb8b553c8b833f618cc2596484e8b6145a
-upstream_url=https://github.com/JohnCremona/eclib/releases/download/vVERSION/eclib-VERSION.tar.bz2
+sha1=ec8dd87df46ac5a54b548354681085d1da6e7e13
+sha256=9f8c2b32e24a4f20d7cc2d336ea30c8ea03b5b0953c2d32adda0c496e7616899
+upstream_url=https://github.com/JohnCremona/eclib/releases/download/VERSION/eclib-VERSION.tar.bz2

build/pkgs/eclib/package-version.txt

@@ -1 +1 @@
-20231212
+20250122

build/pkgs/eclib/spkg-configure.m4

@@ -1,7 +1,7 @@
 SAGE_SPKG_CONFIGURE([eclib], [
   SAGE_SPKG_DEPCHECK([ntl pari flint], [
     dnl use existing eclib only if the version reported by pkg-config is recent enough
-    m4_pushdef([SAGE_ECLIB_VER],["20231212"])
+    m4_pushdef([SAGE_ECLIB_VER],["20241112"])
     PKG_CHECK_MODULES([ECLIB], [eclib >= SAGE_ECLIB_VER], [
       AC_CACHE_CHECK([for mwrank version == SAGE_ECLIB_VER], [ac_cv_path_MWRANK], [
         AC_PATH_PROGS_FEATURE_CHECK([MWRANK], [mwrank], [

src/sage/libs/eclib/__init__.pxd

@@ -55,7 +55,6 @@ cdef extern from "eclib/matrix.h":
     cdef cppclass mat:
         mat()
         mat(mat m)
-        scalar* get_entries()
         scalar sub(long, long)
         long nrows()
         long ncols()
@@ -67,7 +66,6 @@ cdef extern from "eclib/smatrix.h":
     cdef cppclass smat:
         smat()
         smat(smat m)
-        scalar* get_entries()
         scalar sub(long, long)
         long nrows()
         long ncols()

src/sage/libs/eclib/mat.pyx

@@ -11,7 +11,6 @@ from sage.matrix.matrix_integer_sparse cimport Matrix_integer_sparse
 from sage.matrix.matrix_integer_dense cimport Matrix_integer_dense
 from sage.rings.integer cimport Integer
 
-
 cdef class Matrix:
     """
     A Cremona Matrix.
@@ -212,30 +211,27 @@ cdef class Matrix:
             <class 'sage.matrix.matrix_integer_dense.Matrix_integer_dense'>
         """
         cdef long n = self.nrows()
-        cdef long i, j, k
-        cdef scalar* v = <scalar*> self.M.get_entries()   # coercion needed to deal with const
+        cdef long i, j
 
         cdef Matrix_integer_dense Td
         cdef Matrix_integer_sparse Ts
 
         # Ugly code...
         if sparse:
             Ts = MatrixSpace(ZZ, n, sparse=sparse).zero_matrix().__copy__()
-            k = 0
             for i from 0 <= i < n:
                 for j from 0 <= j < n:
-                    if v[k]:
-                        Ts.set_unsafe(i, j, Integer(v[k]))
-                    k += 1
+                    Mij = Integer(self.M.sub(i+1,j+1))
+                    if Mij:
+                        Ts.set_unsafe(i, j, Mij)
             return Ts
         else:
             Td = MatrixSpace(ZZ, n, sparse=sparse).zero_matrix().__copy__()
-            k = 0
             for i from 0 <= i < n:
                 for j from 0 <= j < n:
-                    if v[k]:
-                        Td.set_unsafe(i, j, Integer(v[k]))
-                    k += 1
+                    Mij = Integer(self.M.sub(i+1,j+1))
+                    if Mij:
+                        Td.set_unsafe(i, j, Mij)
             return Td