Multiple src folders containing ino files

I am trying to create a platformio.ini for a project, that comprises multiple arduino sketches, as in:

├── Arduino
│   ├── v1
│   │   ├── some_lib.cpp
│   │   ├── some_lib.h
│   │   └── v1.ino
│   ├── v2
│   │   ├── some_lib.cpp
│   │   ├── some_lib.h
│   │   └── v2.ino
│   ├── v3
│   │   ├── some_lib.cpp
│   │   ├── some_lib.h
│   │   └── v3.ino

v1, v2 and v3 target different boards and have (safe for some_lib) completely independent source-codes. Now, this isn’t my project - the author is targeting the Arduino IDE (hence the .ino files). I would just like to contribute a multi-env platformio.ini without touching anything else. My first attempt looks like this:

src_dir = Arduino

framework = arduino

platform = someplatform1
board = someboard2
build_src_filter =

platform = someplatform2
board = someboard2
build_src_filter =

platform = someplatform3
board = someboard3
build_src_filter =

The issue here seems to be that PIO fails to convert the .ino to .cpp - the compiler only sees some_lib and the linker finally complains:

Linking .pio/build/v1/firmware.elf
.pio/build/v1/libFrameworkArduino.a(main.cpp.o): In function `main':
main.cpp:(.text.startup.main+0x22): undefined reference to `setup'
main.cpp:(.text.startup.main+0x26): undefined reference to `loop'
collect2: error: ld returned 1 exit status

It works fine when renaming the inos to cpp - but again: not my project, so that’s not really an option. Is there any way to do this without additional pre-scripts?

Oh, also: First post - hi everyone! :wave:

If after the build source filter, there are .ino files in the source tree, but PlatformIO is not converting them, it seems like a bug.

  1. Make sure to use the PlatformIO CLIpio upgrade --dev to upgrade to the latest version and retest after project task → clean.
  2. If it’s still not working, file a bug in
1 Like

Thanks! Updating to --dev did not help - I opened an issue here: .ino-files in subfolders are not converted to cpp · Issue #4730 · platformio/platformio-core · GitHub