7 years ago.

Problem with building with static library of mbed-os

Hi,

I am trying to build mbed-os-blinky example by generating a static library for mbed os and then building the main app by linking it against the library.

mbed compile  -t GCC_ARM -m NUCLEO_F429ZI --library --source=mbed-os --build=../LIB_BUILD

mbed compile  -t GCC_ARM -m NUCLEO_F429ZI  --source=./main.app  --source=../LIB_BUILD --build=../basic-out

LIB_BUILD is the build dir that contains the generated .o files and static lib .a; basic-out is the build dir where the final main app linked with mbed static lib is built and .bin is generated.

NOTE: I took off the "no-archive" flag mentioned in the link: https://docs.mbed.com/docs/mbed-os-handbook/en/5.1/dev_tools/cli/#compiling-static-libraries, since mbed compile wasn't generating ".a" static lib with that flag.

#include "mbed.h"

DigitalOut led1(LED1);

// main() runs in its own thread in the OS
int main() {
    while (true) {
        led1 = !led1;
        wait(0.5);
    }
}

When I am trying to build blinky example with the static library, it doesn't seem to run. The LED that's supposed to blink just gets turned ON and doesn't toggle, which seems to be a timer issue as the program execution is stuck on wait(0.5) function call. Looks like the mbed static library isn't compiling everything together(since the timer doesn't seem to be working).

Any ideas?

Thanks!