build/pkgs/{gcc,gfortran}/spkg-configure.m4: Allow 14.x

[mkoeppe]

Fedora 40 already ships GCC 14

Fixes #37698

📝 Checklist

• The title is concise and informative.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation accordingly.

⌛ Dependencies

• Depends on Fix compilation with -std=c++17 #37646

[github-actions]

Documentation preview for this PR (built with commit d17b927; changes) is ready! 🎉

[enriqueartal]

I am still testing gcc 14 with no success. Besides these changes, I needed to use #35148 and some patches in fedora 40 for linbox. The problems are in sagelib, maybe here:

[spkg-install]     sage/graphs/base/static_sparse_backend.c:15899:75: warning: comparison of integer expressions of different signedness: 'uint32_t' {aka 'unsigned int'} and 'int' [-Wsign-compare]
[spkg-install]     15899 |     __pyx_t_1 = (((__pyx_v_self->g_rev->neighbors[__pyx_v_u])[__pyx_v_i]) != __pyx_v_v);
[spkg-install]           |                                                                           ^~
[spkg-install]     sage/graphs/base/dense_graph.c: In function '__pyx_pf_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend_6has_edge':
[spkg-install]     sage/graphs/base/dense_graph.c:18267:103: error: passing argument 1 of '__pyx_f_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend__has_labeled_edge_unsafe' from incompatible pointer type [-Wincompatible-pointer-ty
pes]
[spkg-install]     18267 |   __pyx_t_2 = __pyx_f_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend__has_labeled_edge_unsafe(((struct __pyx_obj_4sage_6graphs_4base_7c_graph_CGraphBackend *)__pyx_v_self), __pyx_v_u_int, __pyx_v_v_int,
 Py_None); if (unlikely(__pyx_t_2 == ((int)-1))) __PYX_ERR(0, 702, __pyx_L1_error)

[enriqueartal]

After last beta, 'sagelib` is not built. I attach the log (of an incremental build); those files and lines are to blame, apparently:
sagelib-10.4.beta3.log

sage/graphs/base/sparse_graph.c:17473:94: error: passing argument 1 of 
'__pyx_f_4sage_6graphs_4base_12sparse_graph_11SparseGraph_add_arc_label_unsafe'
from incompatible pointer type [-Wincompatible-pointer-types]```

sage/graphs/base/dense_graph.c:18268:103: error: passing argument 1 of 
'__pyx_f_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend__has_labeled_edge_unsafe' 
from incompatible pointer type [-Wincompatible-pointer-types]

Same file in 18319:94.

sage/graphs/base/sparse_graph.c:21822:105: error: passing argument 1 of 
'__pyx_f_4sage_6graphs_4base_12sparse_graph_18SparseGraphBackend__has_labeled_edge_unsafe' 
from incompatible pointer type [-Wincompatible-pointer-types]

Same file 21879:96, 22605:97. 22668:90

sage/graphs/base/static_sparse_backend.c:15831:116: error: passing argument 1 of 
'__pyx_f_4sage_6graphs_4base_21static_sparse_backend_18StaticSparseCGraph_next_out_neighbor_unsafe' 
from incompatible pointer type [-Wincompatible-pointer-types]

Same file 19644:109 (arguments 1 and 4), 20154:116, 24845:119

sage/matroids/lean_matrix.c:36372:83: error: passing argument 1 of 
'__pyx_f_4sage_8matroids_11lean_matrix_13TernaryMatrix_is_nonzero' 
from incompatible pointer type [-Wincompatible-pointer-types]

Smae file 43136:86

 sage/plot/plot3d/implicit_surface.c:11783:21: error: assignment to 'PyObject *' {aka 'struct _object *'} 
from incompatible pointer type 'struct __pyx_obj_4sage_4plot_6plot3d_16implicit_surface_VertexInfo 
*' [-Wincompatible-pointer-types]

Same file 12340:21, 13593:21

[erentar]

I am still testing gcc 14 with no success. Besides these changes, I needed to use #35148 and some patches in fedora 40 for linbox. The problems are in sagelib, maybe here:

[spkg-install]     sage/graphs/base/static_sparse_backend.c:15899:75: warning: comparison of integer expressions of different signedness: 'uint32_t' {aka 'unsigned int'} and 'int' [-Wsign-compare]
[spkg-install]     15899 |     __pyx_t_1 = (((__pyx_v_self->g_rev->neighbors[__pyx_v_u])[__pyx_v_i]) != __pyx_v_v);
[spkg-install]           |                                                                           ^~
[spkg-install]     sage/graphs/base/dense_graph.c: In function '__pyx_pf_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend_6has_edge':
[spkg-install]     sage/graphs/base/dense_graph.c:18267:103: error: passing argument 1 of '__pyx_f_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend__has_labeled_edge_unsafe' from incompatible pointer type [-Wincompatible-pointer-ty
pes]
[spkg-install]     18267 |   __pyx_t_2 = __pyx_f_4sage_6graphs_4base_11dense_graph_17DenseGraphBackend__has_labeled_edge_unsafe(((struct __pyx_obj_4sage_6graphs_4base_7c_graph_CGraphBackend *)__pyx_v_self), __pyx_v_u_int, __pyx_v_v_int,
 Py_None); if (unlikely(__pyx_t_2 == ((int)-1))) __PYX_ERR(0, 702, __pyx_L1_error)

i can attest that givaro fails. will try with #35148

[vbraun]

Lets merge this and work on fixing the breakage in separate PRs

[enriqueartal]

For the record, I summarize my tests, not yet successul, but with some progress:

• Apply this PR
• The givaro problems were gone using Updates to linbox-1.7.0, givaro-4.2.0, fflas-ffpack-2.5.0 #35148 with an additional upstream patch for givaro, I guess everything is contain in the new Updates to linbox-1.7.0, givaro-4.2.0, fflas-ffpack-2.5.0 #37938
• Some of the above problems for sagelib are gone with cython-3.0.10, using build/pkgs/cython: Update to 3.0.10 #37584

The remaining errors in sagelib come from sage/plot/plot3d/implicit_surface.c.

Thanks for the work.