2013/5/3 Ozkan Sezer <[email protected]>: > On Fri, May 3, 2013 at 1:09 PM, xunxun <[email protected]> wrote: >> 于 2013/5/3 星期五 17:59, Ozkan Sezer 写道: >>> >>> On Fri, May 3, 2013 at 12:51 PM, niXman <[email protected]> wrote: >>>> >>>> Hi JonY, >>>> >>>>> If you use -D__MINGW_USE_ANSI_STDIO=1, use %lld. >>>>> If you DO NOT USE -D__MINGW_USE_ANSI_STDIO=1, use %I64d. >>>> >>>> Tell me please, what can be reasons to use '%I64d' and do not use >>>> '-D__MINGW_USE_ANSI_STDIO=1' ? >>>> I'm just curious, why not just use the GNU style format string? >>>> >>> One may want to avoid mingw-provided print routines, which are linked >>> statically, and want to use the ones from msvcrt.dll (which is shared >>> code). >>> >>> Personally, I always use windows-native stuff, e.g. %I64 in cases such >>> as this, but yes it may be hard to do so when porting posix and/or c99- >>> compliant code which rely on pure conformance. >>> >>>> Thanks. >>>> >>>> -- >>>> Regards, >>>> niXman >>> >>> -- >>> O.S. >>> >> Kai wants to set it by default on MinGW(64) >> >> -------------------------------------------------- >> >> Hi, >> >> this patch enables the POSIX-printf variant for mingw-hosts by default. >> >> ChangeLog >> >> 2013-03-22 Kai Tietz<[email protected]> >> >> * config/i386/xm-mingw32.h (__USE_MINGW_ANSI_STDIO): Enable >> POSIX-printf >> for mingw-hosted builds. >> >> Tested for i686-w64-mingw32, and x86_64-w64-mingw32. I will apply >> tomorrow, if there aren't any objections by other Windows-maintainers. >> >> Regards, >> Kai >> >> Index: gcc/config/i386/xm-mingw32.h >> =================================================================== >> --- gcc/config/i386/xm-mingw32.h (Revision 196898) >> +++ gcc/config/i386/xm-mingw32.h (Arbeitskopie) >> @@ -29,6 +29,12 @@ along with GCC; see the file COPYING3. If not see >> /* The st_ino field of struct stat is always 0. */ >> #define HOST_LACKS_INODE_NUMBERS >> >> +#ifdef __MINGW32__ >> +#undef __USE_MINGW_ANSI_STDIO >> +#define __USE_MINGW_ANSI_STDIO 1 >> +#else >> /* MSVCRT does not support the "ll" format specifier for printing >> "long long" values. Instead, we use "I64". */ >> #define HOST_LONG_LONG_FORMAT "I64" >> +#endif >> + >> >> >> -- >> Best Regards, >> xunxun >> > > Aside from the fact that I don't get the relevance of __MINGW32__ > check (didn't look at the code), that patch seems to affect gcc's > own code and not any user code being compiled against mingw. Am I > wrong? > > -- > O.S.
You are right. That patch affects gcc's own compilation only. It doesn't affects user-code. Nevertheless for libstdc++-v3 uses - starting with 4.8 - by default POSIX-printf due it relies badly on this behavior internally. Kai ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Mingw-w64-public mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mingw-w64-public
