On Thu, Jan 7, 2016 at 4:39 PM, Tony Mechelynck <[email protected]> wrote: > On Thu, Jan 7, 2016 at 10:08 PM, Charles Campbell > <[email protected]> wrote: >> Hello: >> >> I just noticed that there's a warning when compiling with gcc under >> scientific linux: >> >> misc2.c: In function 'put_time': >> misc2.c:6312: warning: ignoring return value of 'fwrite', declared with >> attribute warn_unused_result >> >> In grep'ing through the patches, I see this one must have creeped in >> back with patch#649, which in turn was trying to get rid of an annoying >> compiler message for whatever compiler Michael Jarvis used. The >> solution was to use (void)fwrite(...) in the put_time() function, but >> gcc v4.4.7 gets grumpy even when explicitly told not to worry by the >> (void) cast. IMHO gcc should let explicitly specified ignored values go >> unmentioned, but there it is. >> >> Presumably, given the optimization and fortify settings, the function is >> prototyped with __attribute_warn_unused_result__ . >> >> There are two solutions: >> >> * apply given patch: this removes the warning using gcc at the price of >> a "silly" variable assignment. I'm afraid that I wouldn't be surprised >> if some compiler out there flags silly as an unused variable, though. >> * specify either -U_FORTIFY_SOURCE or -D_FORTIFY_SOURCE=0 . Probably >> won't want to do that, I'd guess. >> >> I didn't see any -W... settings to turn this message off, btw. >> >> Regards, >> Chip Campbell > > > Since the compiler handles only one source file at a time, it would > probably not complain for an assignment to a silly _global_ variable
There is already a global called `ignored` that is used to silence such warnings. Justin M. Keyes -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
