Why does getdate(char*) not compile in STM32CubeIDE? I cannot find an option to enable it. Is there abother way of char* to tm struct?

[MEdgerton]

I see that the standard time.h is included. But getdate to convert a char* to tm does not coliple as it is not enabled. I have tried various project options with no joy.

Can someone let me know how to do this?

[Tesla DeLorean]

Doesn't compile, or doesn't link?

Assuming the latter you need to link against a full library not some limited, lite or cut-down one.

grep the library directory to find which, if any, contain the function.

Sure you could find some source if you looked too, and integrate that into the project.

[berendi]

Use strptime instead.

#define _XOPEN_SOURCE
#include <time.h>
/* ... */
struct tm tm;
strptime("2001-11-12 18:31:01", "%Y-%m-%d %H:%M:%S", &tm);

_XOPEN_SOURCE must be defined before the very first #include directive, not just before including <time.h>.

[MEdgerton]

Thank you, I found this but it generates a compiler warning " warning: implicit declaration of function 'strptime'; did you mean 'strftime'? [-Wimplicit-function-declaration]".

is there a way to stop this. I try to keep warnings to 0 so I can see any that may actually cause a problem when running.

[berendi]

Again,

_XOPEN_SOURCE must be defined before the very first #include directive, not just before including <time.h>

What is the first non-comment line in the source file in which strptime() is called?

[MEdgerton]

Many thanks, I used strptime and it works well.

[Hasdf.1]

I determined this however it generates a compiler warning caution. implicit declaration of characteristic guidedid you mean strftime? Wimplicit function-statement