[Bug target/46372] New: format '%f' expects type 'double', but argument 3 has type 'float'

[corsepiu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46372

           Summary: format '%f' expects type 'double', but argument 3 has
                    type 'float'
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: corse...@gcc.gnu.org


I am facing the warning from the subject when compiling this snippet below with
avr-*gcc's:

-- snip --
#include <stdio.h>

int main()
{
  float f = 2.0;
  fprintf( stdout, "%f\n", f );
}
-- snip --

# avr-rtems4.10-gcc -O2 -o foo -c foo.c -Wall
foo.c: In function 'main':
foo.c:6: warning: format '%f' expects type 'double', but argument 3 has type
'float'

#  avr-rtems4.10-gcc --version
avr-rtems4.10-gcc (GCC) 4.4.5 20101001 (RTEMS
gcc-4.4.5-2.fc13/newlib-1.18.0-17.fc13)



# avr-gcc -O2 -o foo -c foo.c -Wall
foo.c: In function 'main':
foo.c:6:3: warning: format '%f' expects type 'double', but argument 3 has type
'float'

# avr-gcc --version
avr-gcc (Fedora 4.5.1-2.fc13) 4.5.1