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On Fri, 11 Sep 2015 10:16:56 +0200, Evgeny Grin <k2k@yandex.ru> wrote:
10.09.2015, 23:52, "HK" <hk1020@t-online.de>:On Thu, 10 Sep 2015 13:19:04 +0200, V?clav_Haisman wrote:On 10 September 2015 at 01:30, HK wrote:hello.c:1:0: warning: SSE instruction set disabled, using 387 arithmeticsDoes it help to use `-march=native`? My hunch is that this is because the default CPU type is set to such that does not have SSE.Yep, that did the trick. Thanks for the suggestion. Now, is this a gcc buildbuild problem? The 64bit version doesn't need -march=native and that is onthe same computer.It's not a problem as by default GCC generate code compatible with maximum number of CPU models. If you need to generate an SSE instructions, you have to use at lest -march=pentium3. For x86-64 version, SSE is always enabled as all x86-64 CPUs support SSE and SSE2.See http://gcc.gnu.org/onlinedocs/gcc/x86-Options.html#x86-Options
Thanks. While I don't quite agree with the choice of defaults it makes sense. So does my 32bit window next to the 64bit window on the same computer really
have a different instruction set? Anyway, case closed. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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