On 01.02.2015 4:21, JonY wrote: > On 2/1/2015 08:56, LRN wrote: >> Possible fixes: >> A) Make "%z" the primary, fix libgomp (gcc) to explicitly decorate >> gomp_fatal and gomp_fatal_va as gnu_printf. When compiled without a >> gnu-compatible vfprintf, it will behave incorrectly at runtime, when a gmp >> error happens. >> B) Make printf the primary, fix libgomp (gcc) to use different format >> strings depending on the host. According to [1], the right format for size_t >> for MS CRT is "Iu". This could be a configure-time check, compile a bunch of >> test programs with different format strings for size_t with -Werror, see >> which one works. >> C) Force libgomp to be compiled with __USE_MINGW_ANSI_STDIO defined to 1. >> This might not sit well with non-mingw SDKs that compile gcc (sounds >> weird...). >> > > I think the last option is the path of least resistance, make > configure.ac check if mingw* host and then use __USE_MINGW_ANSI_STDIO if so.
Now that i'm thinking of it, this will probably not fix the warning. It will guarantee that libgomp works correctly at runtime by ensuring that mingw-w64 printf implementation is used, but compile-time format check is determined by the printf format attribute of the function, and i doubt that gcc is smart enough to figure out that the implementation is gnu-compatible. So (C) will have to be combined with (A) for the warning to go away. -- O< ascii ribbon - stop html email! - www.asciiribbon.org
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