S32KのトピックRe: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Danny_Wu — Wed, 26 Jul 2023 02:43:24 GMT

Hello,

I tried to use function snprintf in my project,

even though I had included the following H file,

#include <stdarg.h>

#include <stdio.h>

#include <string.h>

but at compile time it prompt "undefined reference to 'vsnprintf'".

Functions snprintf and sprintf are also unavailable.

Test environment:

S32K314，S32DS.3.5，AUTOSAR project

Re: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Senlent — Wed, 26 Jul 2023 06:33:54 GMT

Hi@Danny_Wu

I made a simple test, it works fine on myside.(RTD2.0.X)

Re: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Danny_Wu — Wed, 26 Jul 2023 06:59:24 GMT

Thanks for your reply.

Maybe because I am using AUTOSAR project, the compilation method is different.
Do you have any advice for the AUTOSAR project on this issue?

Re: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Senlent — Wed, 26 Jul 2023 07:17:59 GMT

Hi@Danny_Wu

This should be related to AUTOSAR,

I saw some answers, for autosar, the standard input/output functions should not be used.

The standard library functions from the '<stdio.h>' / '<cstdio>' and '<wchar.h>' header files can be

dangerous. Their behavior depends on the implementation. Besides, their use might lead to undefined

ehavior.

Re: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Danny_Wu — Wed, 26 Jul 2023 09:15:54 GMT

Thanks for your reply.

This means that I may not be able to use these standard library functions,
So does NXP provide functions that implement these functions (such as vsnprintf)?

Re: S32K314 Compilation prompt "undefined reference to 'vsnprintf'"

Senlent — Wed, 26 Jul 2023 09:26:59 GMT

Hi@Danny_Wu

Sorry, I didn't find any similar function for your direct reference, you need to write it yourself. And as discussed above, for AUTOSAR applications try to avoid using functions in the standard library.