strnlen compile error with Arm Compiler 6.16

[renesas-adam-benson]

When testing with Arm Compiler 6.16 I see the following compile error:

Error: L6218E: Undefined symbol strnlen (referred from cellular_at_core.o)

Unless I'm mistaken, I don't believe AC6 supports strnlen. I've temporarily resolved the compile issue by defining strnlen in the cellular_platform.h file like so:

#if defined(__ARMCC_VERSION)           /* AC6 compiler */
inline size_t strnlen (const char * s, size_t maxlen)
{
    const char * p;

    p = memchr(s, '\0', maxlen);
    if (p == NULL)
    {
        return maxlen;
    }

    return (size_t) (p - s);
}

#endif

[chinglee-iot]

Hi Adam,

Thank you for your feedback. We will have internal discussion about the compile error with AC6 compiler. Once we have conclusion, we will update in this issue.

[chinglee-iot]

Hi Adam,

Currently, we suggest the same method you use to resolve this compilation error.

Developers can provide strnlen in cellular_platform.h if strnlen is not supported in their compilation environment.

If you have suggestion about this, please share with us. We would like to know more from you.

[chinglee-iot]

Hi Adam,

We are trying to remove the unnecessary usage of strnlen in #64. Once merged, I will update this issue.