tmedicci opened a new pull request, #3495:
URL: https://github.com/apache/nuttx-apps/pull/3495
## Summary
* interpreters/python: Add ctypes prototype patches for NuttX:
* integrate NuttX-specific ctypes and posixmodule updates.
* system/libffi: Add libffi package integration:
* Add Kconfig, build rules, and ignore entries required to build and
package libffi as a standalone system component.
## Impact
Impact on user: Allow users to import the ctypes module for Python on NuttX.
Impact on build: No.
Impact on hardware: No.
Impact on documentation: No.
Impact on security: No.
Impact on compatibility: No.
## Testing
`rv-virt:cpython` can be used to test it.
### Building
```
make -j distclean
./tools/configure.sh -S rv-virt:python
kconfig-tweak -e FS_TMPFS
kconfig-tweak --set-val FS_HEAPSIZE 2097152
kconfig-tweak --set-val RAM_SIZE 67108864
kconfig-tweak -e LIBC_DLFCN
kconfig-tweak -e LIB_LIBFFI
kconfig-tweak -e INTERPRETERS_CPYTHON_ENABLE_PIP
make olddefconfig
make -j$(nproc)
```
### Running
After build, run it on the generic RISC-V QEMU:
```
qemu-system-riscv32 -semihosting -M virt,aclint=on -cpu rv32 -smp 8 -m 128 \
-global virtio-mmio.force-legacy=false \
-device virtio-serial-device,bus=virtio-mmio-bus.0 \
-chardev
socket,telnet=on,host=127.0.0.1,port=3450,server=on,wait=off,id=foo \
-device virtconsole,chardev=foo \
-device virtio-rng-device,bus=virtio-mmio-bus.1 \
-netdev
user,id=u1,hostfwd=tcp:127.0.0.1:10023-10.0.2.15:23,hostfwd=tcp:127.0.0.1:15001-10.0.2.15:5001
\
-device virtio-net-device,netdev=u1,bus=virtio-mmio-bus.2 \
-drive file=./mydisk-1gb.img,if=none,format=raw,id=hd \
-device virtio-blk-device,bus=virtio-mmio-bus.3,drive=hd \
-bios none -kernel ./nuttx -nographic
```
And, then, try to import `ctypes` on Python and check its output result to
calculate the size of a C type.
### Results
```
nsh> python
[ 2.710000] check_and_mount_romfs: Mounting ROMFS filesystem at
target=/usr/local/lib with source=/dev/ram1
Python 3.13.0 (main, May 21 2026, 16:35:39) [GCC 14.2.0] on nuttx
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes
>>> x = ctypes.sizeof(ctypes.c_longlong)
>>> x
8
>>>
```
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