printf String formatting broken

[FranzKnut]

Hi!

I am currently developing an application for nrf52832 and am using the uart module with retarget.c for output over uart via printf().

Now a few days ago I added FDS flash storage support and all of a sudden the String formatting using additional parameters for variables (apart from type) stopped working.

For example if I previously invoked

printf("%04X", 1);

I got "0001" as output but doing so now will result in "4X".

Similarly,

printf("%2.5f", 1.0);

will now lead to ".5f".

When deleting all of the additional parameters and only keep the type (%X, %f) everything works as expected.

Any help is much appreciated,

Julian

[Håkon Alseth]

Hi,

 

Did you update the compiler or change your compiler settings lately?

printf() functionality comes from the standard libs provided by your toolchain, and will not depend on the nRF_SDK source tree.

 

Best regards,

Håkon

[FranzKnut]

Hi Håkon,

Im am not aware of any changes I might have done. Do you know what kind of compiler settings could lead to such behaviour?

Thanks,

Julian

[Andre]

The settings would be related to the C library. In case of GCC, using newlib-nano ( --specs=nano.specs ) could cause such behaviour.