General Comments and Discussions

[KStandiford]

I notice that most repositories have no really nice way to talk with the author, ask questions, make suggestions, etc. So I opened the discussions page. If people don't flood it with troll do-do or spam, maybe it will be a good connection. So ask or comment!

[Nothoro]

Hello, Im having difficulty compiling Piccolo_OS_Plus. There was a typeo that I fixed in the docs directory (readme.md.in) was all in upper case. I fixed that and when I typed cmake . it successfully created the makefile. When I used make, I received an error:

(piccolo_os_demo.c:(.ext.spinner+0x10c): undefined reference to 'sem_try_acquire'
collect2: error: id returned 1 exit status

I was able to successfully compile v1 and also 1.1 just fine. I don't have very much experience using cmake. I typically use Arduino C for most of my projects. Please forgive my lack of knowledge. Perhaps I am doing something wrong. On a quick google search it was advised to use -ipthread when I link, however Im not sure where to put switches using cmake/make. Applying -lpthread, -pthread or -lrt options to cmake or make, I receive the same error.
I am using a Raspberry Pi 400, cmake version 3.16.3, gcc is version 8.3.0

Thank you,
Brian.

[BjornTheProgrammer]

Hmmm, using a MacBook Pro 13-inch, M1, 2020 I was able to compile using the following commands from a fresh clone...
mkdir build
cd build
cmake ..
make

Also using a Raspberry Pi 4 I was able to compile it, as seen on my online Pico programmer powered by one as seen on berdos.org, you can see the UART output from the chip, by clicking UART output on the bottom right, and you can run it by clicking build on the top right. After commenting out the add_subdirectory( "${PROJECT_SOURCE_DIR}/docs") line

[Nothoro]

O,k BjornTheProgram..
I did exactly what you noted, it builds all the way up to:
[100%] Linking CXX executable piccolo_os_plus_os_plus_demo_elf
/usr/lib/gcc/arm-none-eabi/7.3.1/../../../arm-none-eabi/bin/ld: CMakeFiles/piccolo_os_plus_demo.dir/piccolo_os_demo.c.obj: in function 'spinner':
piccolo_os_demo.c:(.text.spinner+0x10c): undefined reference to 'sem_try_acquire'
collect2: error: id returned 1 exit status

[BjornTheProgrammer]

The function sem_try_acquire is part of the Pico SDK. Maybe your installation of the SDK was corrupted or something. Try reinstalling it, and see if that fixes it.

[Nothoro]

Yes, thats what I did, and it fixed it. I had over a year of crap on there so I just re-installed raspbian, executed ( ./pico_setup.sh), noted in the getting started pdf and it worked. Thank you for your time in taking a look at this.