[arm-gnu] sprintf issue on Cortex-M3

[Norbert Unterberg <nunterberg@xxxxxxxxx>]

Hi,

we are using arm-none-eabi-gcc (Sourcery G++ Lite 2009q3-68) 4.4.1.

Formatting a floating point number with sprintf does not seem to work:

   char b[20];
   float temperature = 0.4f;
   sprintf(b, "%6.1f ", temperature);

prints "  -0.0" into the buffer.

I have searched the mailing list and have found an article from
September 9 ("output of sprintf with double-input"), but I did not
understand the solution posted there.

Is floating point output with sprintf a known issue?

Norbert Unterberg