.

bigfile/_file_zodb.pyx

@@ -106,11 +106,12 @@ cdef extern from "<wendelin/bigfile/file.h>" nogil:
         pass
 cdef extern from * nogil:
     """
-    extern bigfile_ops ZBigFile_mmap_ops;
+    extern const bigfile_ops ZBigFile_mmap_ops;
     """
     const bigfile_ops ZBigFile_mmap_ops
 from cpython cimport PyCapsule_New
-cdef object _ZBigFile_mmap_pycapsule = PyCapsule_New(&ZBigFile_mmap_ops, "bigfile.blkmmaper", NULL)
+cdef object _ZBigFile_mmap_pycapsule = PyCapsule_New(
+        <void*>&ZBigFile_mmap_ops, "bigfile.blkmmaper", NULL)
 
 
 # pywconnOf establishes and returns (py) wcfs.Conn associated with zconn.

bigfile/file_zodb.cpp

@@ -68,7 +68,7 @@ static void zfile_munmap(VMA *vma, BigFile *file) {
 }
 
 
-//const VirtMMapper zfile_mmapper = {
+// NOTE reusing whole bigfile_ops for just .mmap* ops.
 const bigfile_ops ZBigFile_mmap_ops = {
     .mmap_setup_read    = zfile_mmap_setup_read,
     .remmap_blk_read    = zfile_remmap_blk_read,