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Subject:	Re: i686-w64-mingw32-gcc -fstack-protector-strong
To:	cygwin AT cygwin DOT com
References:	<CAD8GWsusnJQk_Z42o966BUwaFHedZ4xnEvBC7AcEtWe=K0ioKg AT mail DOT gmail DOT com> <b7878d31-389b-2d73-b988-34db0b926efb AT gmail DOT com> <CAD8GWsu53ZtB5exta8vmpAJZiNsvAi2xKK0KKctq-hiaW5Fsfw AT mail DOT gmail DOT com> <80ff03da-8e78-f52a-00ad-cf601bbf4e49 AT gmail DOT com> <CAD8GWsuCBxO_8R9uBZwkGnbnJnV5-DdnvMvJ7txF0Ww6McYXoQ AT mail DOT gmail DOT com> <75eecba1-f968-a596-778f-77bbd8bb5c59 AT gmail DOT com> <CAD8GWsvNi1_9Dm9m50BR+JOE_amcwprWgndA6tdpKsm-tgf9cw AT mail DOT gmail DOT com>
From:	Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
Message-ID:	<4a702e1e-5ce1-175f-ca52-088dd21ef905@cygwin.com>
Date:	Fri, 8 Sep 2017 17:34:00 -0500
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From: Yaakov Selkowitz <yselkowitz AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <4a702e1e-5ce1-175f-ca52-088dd21ef905 AT cygwin DOT com>
Subject: Re: i686-w64-mingw32-gcc -fstack-protector-strong
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On 2017-09-08 16:08, Lee wrote:
> $ i686-w64-mingw32-gcc --version
> i686-w64-mingw32-gcc (GCC) 6.3.0
> Copyright (C) 2016 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOS=
E.
>=20
> $ i686-w64-mingw32-gcc -fstack-protector-strong -o div.exe div.c
> $ ./div.exe
> C:/cygwin/home/Lee/t/div.exe: error while loading shared libraries: ?:
> cannot open shared object file: No such file or directory
> $ objdump -x ./div.exe | egrep -i "dll name"
>         DLL Name: KERNEL32.dll
>         DLL Name: msvcrt.dll
>         DLL Name: libssp-0.dll
> $ ls -l /usr/i686-w64-mingw32/sys-root/mingw/bin/libssp-0.dll
> -rwxr-xr-x 1 root None 14336 Aug 17 08:26
> /usr/i686-w64-mingw32/sys-root/mingw/bin/libssp-0.dll

You created a MinGW executable which depends on other MinGW DLLs.
Therefore, either you have to tell it where to find its dependencies:

PATH=3D"$(cygpath -S):$(cygpath
-W):/usr/i686-w64-mingw32/sys-root/mingw/bin:$PATH" \
./div.exe

Or, since you're only using GCC's libraries, just link with -static.

--=20
Yaakov


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