ForkOn 26/01/2021 17:10, Eli Zaretskii wrote:
> Could someone (Keith?) please remind me how to avoid the following
> compiler warning:
>
> D:\usr\eli>gcc -Wall -pedantic -c tsnprintf.c
When building GCC, I configure with:
--disable-build-format-warnings
but that's a package-specific configuration option. For more general
use, you could try:
D:\usr\eli>gcc -Wall -pedantic -Wno-pedantic-ms-format -c tsnprintf.c
Alternatively, insert:
#pragma GCC diagnostic ignored "-Wformat"
into the source, (but that would suppress *all* format warnings), or
(more selectively) wrap the offending snprintf() call within:
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wformat"
snprintf (buf, 40, "%" PRIu64, bar);
# pragma GCC diagnostic pop
(Unfortunately, I'm not aware of any pragma which would activate
-Wno-pedantic-ms-format
in any more selective fashion, or I might suggest adding it to features.h).
> One way of getting rid of this is to use _snprintf instead, but is
> there a cleaner way?
I wouldn't recommend that: _snprintf() is *not* a drop-in replacement
for snprintf(), but __mingw_snprintf() might be a viable alternative;
(after all, it *is* MinGW's effective implementation of snprintf()).
> I thought some function attribute could solve this, perhaps?
The format attribute is already specified; I'm not aware of any modifier
to override the pedantic-ms-format behaviour.
--
Regards,
Keith.
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