David Gressett
DGres****@amli-*****
Sat Jun 30 23:39:42 JST 2018
>From: mingw****@lists***** [mailto:mingw****@lists*****] On Behalf Of Keith Marshall >Sent: Saturday, June 30, 2018 8:46 AM >To: mingw****@lists***** >Subject: Re: [Mingw-users] Yet another compilation problem with building gcc 7.3.0 >On 29/06/18 03:52, David Gressett wrote: >> I found that my successful gcc 7.1.0 build has tconfig.h, but my >> failed 7.3.0 build has config.h. >I suspect that config.h vs. tconfig.h may be a red herring; the issue is >(again) in gcc/ada/mingw32.h, where in gcc-7.1.0, I see: >| /* We need functionality available only starting with Windows XP */ >| #ifndef _WIN32_WINNT #define _WIN32_WINNT 0x0501 #endif >| >| #ifndef __CYGWIN__ >| #include <tchar.h> >| #endif >| #if defined (__CYGWIN__) && !defined (__CYGWIN32__) && !defined >| (IN_RTS) >| /* Note: windows.h on cygwin-64 includes x86intrin.h which uses malloc. >| That fails to compile, if malloc is poisoned, i.e. if !IN_RTS. */ >| #define _X86INTRIN_H_INCLUDED #endif #include <windows.h> >| >| #ifndef _O_U8TEXT >| #define _O_U8TEXT _O_TEXT >| #endif >| #ifndef _O_U16TEXT >| #define _O_U16TEXT _O_TEXT >| #endif >| #ifndef _O_WTEXT >| #define _O_WTEXT _O_TEXT >| #endif ... snip ... I found the "fallback" when I resumed my detecteve work, and put it back. The changelog file fefers to the removal; The fallback caused a problem with Cygwin64, and contained a reference to the bug report, which I looked up on the gcc web site. It wasn't very informative, I saw no explanation for why the fallback was removed rather than given an appropriate #ifdef wrapper. The reinsertion solved the last build problem, and I now have a successful native build of gcc 7.3.0 My next step is to crawl through the build log and look for warnings that shouldn't be there.
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