QUERY · ISSUE

ports/unix: Allow building and linking dynamically against libmbedtls on Linux

openby aylen384opened 2025-10-22updated 2025-10-22

enhancement

Description

It would be nice if micropython could be built against the libmbedtls from a linux distro instead of the one bundled with the sources - similar to as it works now with libffi on the unix port.

Code Size

No response

Implementation

I hope the MicroPython maintainers or community will implement this feature

Code of Conduct

Yes, I agree

CANDIDATE · PULL REQUEST

unix/make: Fix 32bit libffi path.

openby yf13opened 2025-07-17updated 2025-08-01

port-unix

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Summary

This fixes libffi.a link error when building 32bit standalone UNIX port on Ubuntu 22.04:

$ make -C ports/unix MICROPY_STANDALONE=1 MICROPY_FORCE_32BIT=1 CC=i686-linux-gnu-gcc CXX=i686-linux-gnu-g++ deplibs
$ make -C ports/unix MICROPY_STANDALONE=1 MICROPY_FORCE_32BIT=1 CC=i686-linux-gnu-gcc CXX=i686-linux-gnu-g++
...
LINK build-standard/micropython
/usr/lib/gcc-cross/i686-linux-gnu/11/../../../../i686-linux-gnu/bin/ld: cannot find build-standard/lib/libffi/out/lib32/libffi.a: No such file or directory
collect2: error: ld returned 1 exit status

Testing

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Checked on Ubuntu 22.04 like:

$ make -C ports/unix MICROPY_STANDALONE=1 MICROPY_FORCE_32BIT=1 CC=i686-linux-gnu-gcc CXX=i686-linux-gnu-g++ deplibs
$ make -C ports/unix MICROPY_STANDALONE=1 MICROPY_FORCE_32BIT=1 CC=i686-linux-gnu-gcc CXX=i686-linux-gnu-g++
...
LINK build-standard/micropython
   text      data       bss       dec       hex   filename
 743657     35968      2788    782413     bf04d   build-standard/micropython
$ file ports/unix/build-standard/micropython
ports/unix/build-standard/micropython: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, BuildID[sha1]=3c107769fefd7b467ca0b095ad1c6d28b1702826, for GNU/Linux 3.2.0, stripped
$ ldd ports/unix/build-standard/micropython
     linux-gate.so.1 (0xf7f7b000)
     libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf7d8f000)
     libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7a00000)
     /lib/ld-linux.so.2 (0xf7f7d000)