[newlib] print formats for FAST and LEAST types

Corinna Vinschen vinschen@redhat.com
Tue Jul 14 13:56:00 GMT 2015

On Jul 14 12:17, Andre Vieira wrote:
> Hello,
> Kevin Bracey commented on Launchpad that he was having issues with a
> mismatch between <inttypes.h> and <stdint.h> when printing an int_fast32_t.
> See https://answers.launchpad.net/gcc-arm-embedded/+question/269083
> This is due to the fact that on targets where the size of ‘int’ and ‘long’
> are equal and 32 bits, the current header files will configure the type of
> int_fast32_t to be ‘int’ and PRIdFAST32 to be ‘ld’ and make printf thus
> expect a ‘long’. The macro’s used in <stdint.h> come from
> ‘gcc/config/newlib-stdint.h’.

Are you looking into an older version of newlib by any chance?  We
added code to newlib's headers to check explicitely at runtime whether
__INT32_TYPE__ is int or long, and set the PRIxxx32 macros accordingly.

See https://sourceware.org/git/?p=newlib-cygwin.git;h=496380c

I just checked this on 32 bit Cygwin:

  $ gcc -E - <<EOF
  #include <inttypes.h>
  #include <stdint.h>
If there's still anything wrong with that, feel free to send patches.


Corinna Vinschen
Cygwin Maintainer
Red Hat
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