(minor) Some functions missing prototypes

[fenugrec]

Compiling with -Werror=missing-prototypes (I have that set globally in a project), causes these:

gpibusb-firmware-arm/printf/src/printf/printf.c:483:8: error: no previous prototype for 'apply_scaling' [-Werror=missing-prototypes]
  483 | double apply_scaling(double num, struct scaling_factor normalization)
      |        ^~~~~~~~~~~~~
gpibusb-firmware-arm/printf/src/printf/printf.c:488:8: error: no previous prototype for 'unapply_scaling' [-Werror=missing-prototypes]
  488 | double unapply_scaling(double normalized, struct scaling_factor normalization)
      |        ^~~~~~~~~~~~~~~
gpibusb-firmware-arm/printf/src/printf/printf.c:493:23: error: no previous prototype for 'update_normalization' [-Werror=missing-prototypes]
  493 | struct scaling_factor update_normalization(struct scaling_factor sf, double extra_multiplicative_factor)
      |                       ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Perhaps those functions could be declared as static since (if I understand correctly) they're not meant to be used outside of printf.c ?

[eyalroz]

Sure, why not. Note this won't reach the master branch for a while, as I've just released 5.2.0.

[fenugrec]

that's fine, I'm pulling in as a git submodule here. Thanks !

[phillipjohnston]

I saw this tagged as fixed-on-develop, but I get this warning in GCC-9 on the develop branch (none on master):

../printf/src/printf/printf.c: At top level:
../printf/src/printf/printf.c:952:16: warning: no previous declaration for 'parse_flags' [-Wmissing-declarations]
  952 | printf_flags_t parse_flags(const char** format)
      |

[eyalroz]

@phillipjohnston : Regressed by a recent commit...

[eyalroz]

@phillipjohnston : done.