-patch the following file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Objects/mimalloc/prim/unix/prim.c

efined(__NetBSD__)
  #define MI_HAS_SYSCALL_H
//  #include <sys/syscall.h>
#endif 


-patch the same file 

#if defined(__QNX__)
#  undef madvise
#  define madvise posix_madvise
#  if !defined(MADV_DONTNEED) && defined(POSIX_MADV_DONTNEED)
#    define MADV_DONTNEED POSIX_MADV_DONTNEED
#  endif
#endif 


-patch the following file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Modules/faulthandler.c

+#ifdef SA_RESTART
+    action.sa_flags = SA_RESTART;
+#else
+    action.sa_flags = 0;        /* QNX / other platforms without SA_RESTART */
+#endif


-patch the following file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Modules/posixmodule.c 

#elif defined(HAVE_SYS_IOCTL_H)
#  include <sys/ioctl.h>
#  if defined(HAVE_TERMIOS_H)
#    include <termios.h>
#  endif

+#if defined(__QNX__)
+#include <unix.h>        /* openpty(), login_tty(), forkpty() on QNX 8.0 */
+#include <termios.h>
+#include <sys/ioctl.h>
+#endif



-symlink gcc(clang) to qcc 
ln -s /usr/bin/gcc /usr/bin/qcc


-patch the following file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Makefile 

-LINKFORSHARED=  -Wl,-E -N 2048K
+LINKFORSHARED=  -Wl,-z,stack-size=2097152


-patch the follwing file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Modules/selectmodule.c 

#if defined(__QNX__)
#  define FD_SETSIZE 1024
#  include <sys/select.h>   /* provides fd_set, FD_ZERO, FD_SET, FD_ISSET on QNX */
#  include <sys/time.h>     /* provides struct timeval */
#endif

#ifdef __APPLE__
    /* Perform runtime testing for a broken poll on OSX to make it easier
     * to use the same binary on multiple releases of the OS.
     */


-patch the following file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Modules/termios.c 

#if defined(__QNX__)
#define __TERMIO_H_INCLUDED
#include <sys/termio.h>
#define NCC 18

/* QNX is strictly POSIX; the old SVR4-style TCGETA etc. cause header conflicts.
   We don't need them in the termios module. */
#undef TCGETA
#undef TCSETA
#undef TCSETAW
#undef TCSETAF
#endif


-patch the follwing file 
/data/pkgsrc/lang/python313/work/Python-3.13.12/Modules/_testinternalcapi/pytime.c 

#if defined(__QNX__)
#include <sys/time.h>     /* defines struct timeval on QNX 8.0 */
#endif


--last step is to do the following : 
--the build fails so we fix it as 

[root@qnxpi /data/pkgsrc/lang/python313/work/Python-3.13.12 ]# clang -fPIC -I. -IInclude -I../Include -I/usr/include -DNCURSES_WIDECHAR=1     -c ./Modules/_ctypes/_ctypes_test.c -o Modules/_ctypes/_ctypes_test
[root@qnxpi /data/pkgsrc/lang/python313/work/Python-3.13.12]# clang -shared -L/usr/lib -Wl,-R/usr/lib -L/data/pkg/lib -Wl,-R/data/pkg/lib \
    Modules/_ctypes/_ctypes_test.o -lm -o Modules/_ctypes_test.so 


--one last fix is needed 

[root@qnxpi /data/pkgsrc/lang/python313/work/Python-3.13.12 ]# make LINKFORSHARED="$LINKFORSHARED -Wl,-E" python
--Fix PLIST 




--- Also make sure to put this file in /data/pkg/lib/python3.13/itecustomize.py 
### This is  QNX 8 specific fix for pkgsrc python-setup-tools 

import os
import shutil
import sys
import tempfile

if sys.platform.startswith('qnx'):
    print("Applying QNX rmtree workaround for NotADirectoryError races", file=sys.stderr)

    original_rmtree_safe_fd = shutil._rmtree_safe_fd

    def qnx_rmtree_safe_fd(stack, onexc):
        """QNX-tolerant wrapper for _rmtree_safe_fd to handle races where dir becomes non-dir."""
        try:
            return original_rmtree_safe_fd(stack, onexc)
        except NotADirectoryError as err:
            # Race: the path is no longer a directory (common on QNX during heavy build cleanup)
            path = getattr(err, 'filename', None) or str(err)
            if not os.path.exists(path) or not os.path.isdir(path):
                return  # safely ignore - already gone or turned non-dir
            # If it's a file, try to unlink it
            if os.path.isfile(path):
                try:
                    os.unlink(path)
                    return
                except Exception:
                    pass
            # Re-raise only if it's truly unexpected
            raise

    shutil._rmtree_safe_fd = qnx_rmtree_safe_fd

    # Also reinforce TemporaryDirectory
    original_TempDir = tempfile.TemporaryDirectory

    class QnxTemporaryDirectory(original_TempDir):
        def __init__(self, *args, **kwargs):
            kwargs.setdefault('ignore_cleanup_errors', True)
            super().__init__(*args, **kwargs)

    tempfile.TemporaryDirectory = QnxTemporaryDirectory