The "z" modifier was introduced in c99, but using "l" instead
seems to work.
setting_list.c: In function ‘setting_get_string_representation_size’:
setting_list.c:175:24: warning: ISO C90 does not support the ‘z’ gnu_printf length modifier [-Wformat=]
snprintf(s, len, "%" PRI_SIZET,
^~~
setting_list.c: In function ‘setting_get_string_representation_size_in_mb’:
setting_list.c:183:24: warning: ISO C90 does not support the ‘z’ gnu_printf length modifier [-Wformat=]
snprintf(s, len, "%" PRI_SIZET,
^~~
setting_list.c: In function ‘setting_set_with_string_representation’:
setting_list.c:508:24: warning: ISO C90 does not support the ‘z’ gnu_scanf length modifier [-Wformat=]
sscanf(value, "%" PRI_SIZET, setting->value.target.sizet);
^~~
libretro-common/file/config_file.c: In function ‘config_get_size_t’:
libretro-common/file/config_file.c:692:32: warning: ISO C90 does not support the ‘z’ gnu_scanf length modifier [-Wformat=]
if (sscanf(entry->value, "%" PRI_SIZET, &val) == 1